diff --git a/docs/bookdown_example/01-cross-format.Rmd b/docs/bookdown_example/01-cross-format.Rmd
new file mode 100644
index 0000000..172b523
--- /dev/null
+++ b/docs/bookdown_example/01-cross-format.Rmd
@@ -0,0 +1,38 @@
+# Cross-format Tables in Bookdown
+
+> Note that if kableExtra 0.9.0 doesn't support the EPUB format. If you need to output tables in `.epub`, please upgrade to the dev version or version 1.0 on CRAN once it's released.
+
+## Use the "K-M" approach instead of "M-K"
+Please read this chapter about the "K-M"/"M-K" approaches in `bookdown`:
+https://bookdown.org/yihui/bookdown/new-session.html
+
+To generate cross-format tables with `kableExtra` in a multi-format bookdown project, you will have to use the "M-K" approach by setting `new_session: true` in `_bookdown.yml`. Somehow the "M-K" approach, which merges chapters to a big Rmd and then renders, shares the global environment across formats. For now, I'm not sure if this is a bug or intended behavior. It might be fixable in the future but please don't count on that. By setting `new_session: true`, we force R to use a new session for every chapter for different formats. In this way, tables are generated differently in different formats. 
+
+Note that the "M-K" approach is slower than the "K-M" approach. At the same time, packages and data are not shared accross chapter.
+
+```
+# Example _bookdown.yml
+book_filename: "bookdown_example"
+delete_merged_file: true
+new_session: true
+language:
+  ui:
+    chapter_name: "Chapter "
+```
+
+## Prepare Your Tables for Both Formats
+In most cases, functions in `kable` and `kableExtra` use the same API to accomplish the same styling task in HTML and LaTeX. However, you also need some format specific settings so your tables will look good in both formats. Some common items here include the `booktabs` and `longtable` settings in `kable` and the `bootstrap_options` and `latex_options` in `kable_styling`. 
+
+Here is an example for a table that will work in both HTML and LaTeX.
+
+```{r}
+library(kableExtra)
+mtcars[1:5, 1:5] %>%
+  kable(booktabs = T) %>% 
+  kable_styling(
+    latex_options = c("striped"),
+    full_width = F
+  ) %>%
+  column_spec(1, bold = T) %>%
+  add_header_above(c(" ", "Group A" = 2, "Group B" = 3))
+```
\ No newline at end of file
diff --git a/docs/bookdown_example/02-bootstrap_in_gitbook.Rmd b/docs/bookdown_example/02-bootstrap_in_gitbook.Rmd
new file mode 100644
index 0000000..796f910
--- /dev/null
+++ b/docs/bookdown_example/02-bootstrap_in_gitbook.Rmd
@@ -0,0 +1,29 @@
+# Use Bootstrap Tables in gitbooks & epub
+
+## Gitbook
+Most of `kableExtra` tricks will work in `bookdown` except those requires [`bootstrap`](http://getbootstrap.com/). By default, `rmarkdown` won't load `bootstrap` for you on gitbook as it's not necesary. In `kableExtra`, I used the [bootstrap 3.3.7 customization tool](https://getbootstrap.com/docs/3.3/customize/) and made a customized css copy. You can load it by setting `options(kableExtra.html.bsTable = T)`. 
+
+```{r}
+library(kableExtra)
+options(kableExtra.html.bsTable = T)
+
+mtcars[1:5, 1:5] %>%
+  kable(booktabs = T) %>% 
+  kable_styling(
+    bootstrap_options = c("striped","hover", "bordered"),
+    latex_options = c("striped"),
+    full_width = F
+  ) %>%
+  column_spec(1, color = "red") %>%
+  add_header_above(c(" ", "Group A" = 2, "Group B" = 3))
+```
+
+However, very unfortunately, as we can see, the `hover` part is not working and the table still looks different from a regular bootstrap table. The reason is that gitbook defines its own way to style tables and some of its rules are conflicting with the one defined in bootstrap. For css, it's like once you load something, it's impossible to really unload it. As a result, unless there are some changes in `bookdown` (for example, we can replace the gitbook table part with bootstrap tables), there is nothing we can do here. 
+
+## Epub
+Right now, it's impossible to load addition CSS through HTML dependency (due to a setting in rmarkdown). I will file an issue in `rmarkdown` and see if this is something that can be changed. In the mean time, to use bootstrap tables in Epub, you will have to manually load [this stylesheet](https://github.com/haozhu233/kableExtra/blob/master/inst/bootstrapTable-3.3.7/bootstrapTable.min.css) by putting it to a CSS file (such as "style.css") and load it in `_output.yml`. For example,
+
+```
+bookdown::epub_book: 
+  stylesheet: style.css
+```
\ No newline at end of file
diff --git a/docs/bookdown_example/README.md b/docs/bookdown_example/README.md
new file mode 100644
index 0000000..6948df7
--- /dev/null
+++ b/docs/bookdown_example/README.md
@@ -0,0 +1 @@
+This is a minimal example of a book based on R Markdown and **bookdown** (https://github.com/rstudio/bookdown). Please see the page "Get Started" at https://bookdown.org/ for how to compile this example.
diff --git a/docs/bookdown_example/_book/01-cross-format.md b/docs/bookdown_example/_book/01-cross-format.md
new file mode 100644
index 0000000..bf02a3f
--- /dev/null
+++ b/docs/bookdown_example/_book/01-cross-format.md
@@ -0,0 +1,99 @@
+# Cross-format Tables in Bookdown
+
+> Note that if kableExtra 0.9.0 doesn't support the EPUB format. If you need to output tables in `.epub`, please upgrade to the dev version or version 1.0 on CRAN once it's released.
+
+## Use the "K-M" approach instead of "M-K"
+Please read this chapter about the "K-M"/"M-K" approaches in `bookdown`:
+https://bookdown.org/yihui/bookdown/new-session.html
+
+To generate cross-format tables with `kableExtra` in a multi-format bookdown project, you will have to use the "M-K" approach by setting `new_session: true` in `_bookdown.yml`. Somehow the "M-K" approach, which merges chapters to a big Rmd and then renders, shares the global environment across formats. For now, I'm not sure if this is a bug or intended behavior. It might be fixable in the future but please don't count on that. By setting `new_session: true`, we force R to use a new session for every chapter for different formats. In this way, tables are generated differently in different formats. 
+
+Note that the "M-K" approach is slower than the "K-M" approach. At the same time, packages and data are not shared accross chapter.
+
+```
+# Example _bookdown.yml
+book_filename: "bookdown_example"
+delete_merged_file: true
+new_session: true
+language:
+  ui:
+    chapter_name: "Chapter "
+```
+
+## Prepare Your Tables for Both Formats
+In most cases, functions in `kable` and `kableExtra` use the same API to accomplish the same styling task in HTML and LaTeX. However, you also need some format specific settings so your tables will look good in both formats. Some common items here include the `booktabs` and `longtable` settings in `kable` and the `bootstrap_options` and `latex_options` in `kable_styling`. 
+
+Here is an example for a table that will work in both HTML and LaTeX.
+
+
+```r
+library(kableExtra)
+mtcars[1:5, 1:5] %>%
+  kable(booktabs = T) %>% 
+  kable_styling(
+    latex_options = c("striped"),
+    full_width = F
+  ) %>%
+  column_spec(1, bold = T) %>%
+  add_header_above(c(" ", "Group A" = 2, "Group B" = 3))
+```
+
+<table class="table" style="width: auto !important; margin-left: auto; margin-right: auto;">
+ <thead>
+<tr>
+<th style="border-bottom:hidden" colspan="1"></th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="2"><div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">Group A</div></th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="3"><div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">Group B</div></th>
+</tr>
+  <tr>
+   <th style="text-align:left;">   </th>
+   <th style="text-align:right;"> mpg </th>
+   <th style="text-align:right;"> cyl </th>
+   <th style="text-align:right;"> disp </th>
+   <th style="text-align:right;"> hp </th>
+   <th style="text-align:right;"> drat </th>
+  </tr>
+ </thead>
+<tbody>
+  <tr>
+   <td style="text-align:left;font-weight: bold;"> Mazda RX4 </td>
+   <td style="text-align:right;"> 21.0 </td>
+   <td style="text-align:right;"> 6 </td>
+   <td style="text-align:right;"> 160 </td>
+   <td style="text-align:right;"> 110 </td>
+   <td style="text-align:right;"> 3.90 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;font-weight: bold;"> Mazda RX4 Wag </td>
+   <td style="text-align:right;"> 21.0 </td>
+   <td style="text-align:right;"> 6 </td>
+   <td style="text-align:right;"> 160 </td>
+   <td style="text-align:right;"> 110 </td>
+   <td style="text-align:right;"> 3.90 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;font-weight: bold;"> Datsun 710 </td>
+   <td style="text-align:right;"> 22.8 </td>
+   <td style="text-align:right;"> 4 </td>
+   <td style="text-align:right;"> 108 </td>
+   <td style="text-align:right;"> 93 </td>
+   <td style="text-align:right;"> 3.85 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;font-weight: bold;"> Hornet 4 Drive </td>
+   <td style="text-align:right;"> 21.4 </td>
+   <td style="text-align:right;"> 6 </td>
+   <td style="text-align:right;"> 258 </td>
+   <td style="text-align:right;"> 110 </td>
+   <td style="text-align:right;"> 3.08 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;font-weight: bold;"> Hornet Sportabout </td>
+   <td style="text-align:right;"> 18.7 </td>
+   <td style="text-align:right;"> 8 </td>
+   <td style="text-align:right;"> 360 </td>
+   <td style="text-align:right;"> 175 </td>
+   <td style="text-align:right;"> 3.15 </td>
+  </tr>
+</tbody>
+</table>
diff --git a/docs/bookdown_example/_book/02-bootstrap_in_gitbook.md b/docs/bookdown_example/_book/02-bootstrap_in_gitbook.md
new file mode 100644
index 0000000..8028195
--- /dev/null
+++ b/docs/bookdown_example/_book/02-bootstrap_in_gitbook.md
@@ -0,0 +1,90 @@
+# Use Bootstrap Tables in gitbooks & epub
+
+## Gitbook
+Most of `kableExtra` tricks will work in `bookdown` except those requires [`bootstrap`](http://getbootstrap.com/). By default, `rmarkdown` won't load `bootstrap` for you on gitbook as it's not necesary. In `kableExtra`, I used the [bootstrap 3.3.7 customization tool](https://getbootstrap.com/docs/3.3/customize/) and made a customized css copy. You can load it by setting `options(kableExtra.html.bsTable = T)`. 
+
+
+```r
+library(kableExtra)
+options(kableExtra.html.bsTable = T)
+
+mtcars[1:5, 1:5] %>%
+  kable(booktabs = T) %>% 
+  kable_styling(
+    bootstrap_options = c("striped","hover", "bordered"),
+    latex_options = c("striped"),
+    full_width = F
+  ) %>%
+  column_spec(1, color = "red") %>%
+  add_header_above(c(" ", "Group A" = 2, "Group B" = 3))
+```
+
+<table class="table table-striped table-hover table-bordered" style="width: auto !important; margin-left: auto; margin-right: auto;">
+ <thead>
+<tr>
+<th style="border-bottom:hidden" colspan="1"></th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="2"><div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">Group A</div></th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="3"><div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">Group B</div></th>
+</tr>
+  <tr>
+   <th style="text-align:left;">   </th>
+   <th style="text-align:right;"> mpg </th>
+   <th style="text-align:right;"> cyl </th>
+   <th style="text-align:right;"> disp </th>
+   <th style="text-align:right;"> hp </th>
+   <th style="text-align:right;"> drat </th>
+  </tr>
+ </thead>
+<tbody>
+  <tr>
+   <td style="text-align:left;color: red;"> Mazda RX4 </td>
+   <td style="text-align:right;"> 21.0 </td>
+   <td style="text-align:right;"> 6 </td>
+   <td style="text-align:right;"> 160 </td>
+   <td style="text-align:right;"> 110 </td>
+   <td style="text-align:right;"> 3.90 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;color: red;"> Mazda RX4 Wag </td>
+   <td style="text-align:right;"> 21.0 </td>
+   <td style="text-align:right;"> 6 </td>
+   <td style="text-align:right;"> 160 </td>
+   <td style="text-align:right;"> 110 </td>
+   <td style="text-align:right;"> 3.90 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;color: red;"> Datsun 710 </td>
+   <td style="text-align:right;"> 22.8 </td>
+   <td style="text-align:right;"> 4 </td>
+   <td style="text-align:right;"> 108 </td>
+   <td style="text-align:right;"> 93 </td>
+   <td style="text-align:right;"> 3.85 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;color: red;"> Hornet 4 Drive </td>
+   <td style="text-align:right;"> 21.4 </td>
+   <td style="text-align:right;"> 6 </td>
+   <td style="text-align:right;"> 258 </td>
+   <td style="text-align:right;"> 110 </td>
+   <td style="text-align:right;"> 3.08 </td>
+  </tr>
+  <tr>
+   <td style="text-align:left;color: red;"> Hornet Sportabout </td>
+   <td style="text-align:right;"> 18.7 </td>
+   <td style="text-align:right;"> 8 </td>
+   <td style="text-align:right;"> 360 </td>
+   <td style="text-align:right;"> 175 </td>
+   <td style="text-align:right;"> 3.15 </td>
+  </tr>
+</tbody>
+</table>
+
+However, very unfortunately, as we can see, the `hover` part is not working and the table still looks different from a regular bootstrap table. The reason is that gitbook defines its own way to style tables and some of its rules are conflicting with the one defined in bootstrap. For css, it's like once you load something, it's impossible to really unload it. As a result, unless there are some changes in `bookdown` (for example, we can replace the gitbook table part with bootstrap tables), there is nothing we can do here. 
+
+## Epub
+Right now, it's impossible to load addition CSS through HTML dependency (due to a setting in rmarkdown). I will file an issue in `rmarkdown` and see if this is something that can be changed. In the mean time, to use bootstrap tables in Epub, you will have to manually load [this stylesheet](https://github.com/haozhu233/kableExtra/blob/master/inst/bootstrapTable-3.3.7/bootstrapTable.min.css) by putting it to a CSS file (such as "style.css") and load it in `_output.yml`. For example,
+
+```
+bookdown::epub_book: 
+  stylesheet: style.css
+```
diff --git a/docs/bookdown_example/_book/bookdown_example.epub b/docs/bookdown_example/_book/bookdown_example.epub
new file mode 100644
index 0000000..4364f32
--- /dev/null
+++ b/docs/bookdown_example/_book/bookdown_example.epub
Binary files differ
diff --git a/docs/bookdown_example/_book/bookdown_example.pdf b/docs/bookdown_example/_book/bookdown_example.pdf
new file mode 100644
index 0000000..c8d8ca4
--- /dev/null
+++ b/docs/bookdown_example/_book/bookdown_example.pdf
Binary files differ
diff --git a/docs/bookdown_example/_book/bookdown_example.tex b/docs/bookdown_example/_book/bookdown_example.tex
new file mode 100644
index 0000000..8ddc0f0
--- /dev/null
+++ b/docs/bookdown_example/_book/bookdown_example.tex
@@ -0,0 +1,343 @@
+\documentclass[]{book}
+\usepackage{lmodern}
+\usepackage{amssymb,amsmath}
+\usepackage{ifxetex,ifluatex}
+\usepackage{fixltx2e} % provides \textsubscript
+\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
+  \usepackage[T1]{fontenc}
+  \usepackage[utf8]{inputenc}
+\else % if luatex or xelatex
+  \ifxetex
+    \usepackage{mathspec}
+  \else
+    \usepackage{fontspec}
+  \fi
+  \defaultfontfeatures{Ligatures=TeX,Scale=MatchLowercase}
+\fi
+% use upquote if available, for straight quotes in verbatim environments
+\IfFileExists{upquote.sty}{\usepackage{upquote}}{}
+% use microtype if available
+\IfFileExists{microtype.sty}{%
+\usepackage{microtype}
+\UseMicrotypeSet[protrusion]{basicmath} % disable protrusion for tt fonts
+}{}
+\usepackage[margin=1in]{geometry}
+\usepackage{hyperref}
+\hypersetup{unicode=true,
+            pdftitle={Using kableExtra in Bookdown Projects},
+            pdfauthor={Hao Zhu},
+            pdfborder={0 0 0},
+            breaklinks=true}
+\urlstyle{same}  % don't use monospace font for urls
+\usepackage{natbib}
+\bibliographystyle{apalike}
+\usepackage{color}
+\usepackage{fancyvrb}
+\newcommand{\VerbBar}{|}
+\newcommand{\VERB}{\Verb[commandchars=\\\{\}]}
+\DefineVerbatimEnvironment{Highlighting}{Verbatim}{commandchars=\\\{\}}
+% Add ',fontsize=\small' for more characters per line
+\usepackage{framed}
+\definecolor{shadecolor}{RGB}{248,248,248}
+\newenvironment{Shaded}{\begin{snugshade}}{\end{snugshade}}
+\newcommand{\AlertTok}[1]{\textcolor[rgb]{0.94,0.16,0.16}{#1}}
+\newcommand{\AnnotationTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{\textbf{\textit{#1}}}}
+\newcommand{\AttributeTok}[1]{\textcolor[rgb]{0.77,0.63,0.00}{#1}}
+\newcommand{\BaseNTok}[1]{\textcolor[rgb]{0.00,0.00,0.81}{#1}}
+\newcommand{\BuiltInTok}[1]{#1}
+\newcommand{\CharTok}[1]{\textcolor[rgb]{0.31,0.60,0.02}{#1}}
+\newcommand{\CommentTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{\textit{#1}}}
+\newcommand{\CommentVarTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{\textbf{\textit{#1}}}}
+\newcommand{\ConstantTok}[1]{\textcolor[rgb]{0.00,0.00,0.00}{#1}}
+\newcommand{\ControlFlowTok}[1]{\textcolor[rgb]{0.13,0.29,0.53}{\textbf{#1}}}
+\newcommand{\DataTypeTok}[1]{\textcolor[rgb]{0.13,0.29,0.53}{#1}}
+\newcommand{\DecValTok}[1]{\textcolor[rgb]{0.00,0.00,0.81}{#1}}
+\newcommand{\DocumentationTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{\textbf{\textit{#1}}}}
+\newcommand{\ErrorTok}[1]{\textcolor[rgb]{0.64,0.00,0.00}{\textbf{#1}}}
+\newcommand{\ExtensionTok}[1]{#1}
+\newcommand{\FloatTok}[1]{\textcolor[rgb]{0.00,0.00,0.81}{#1}}
+\newcommand{\FunctionTok}[1]{\textcolor[rgb]{0.00,0.00,0.00}{#1}}
+\newcommand{\ImportTok}[1]{#1}
+\newcommand{\InformationTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{\textbf{\textit{#1}}}}
+\newcommand{\KeywordTok}[1]{\textcolor[rgb]{0.13,0.29,0.53}{\textbf{#1}}}
+\newcommand{\NormalTok}[1]{#1}
+\newcommand{\OperatorTok}[1]{\textcolor[rgb]{0.81,0.36,0.00}{\textbf{#1}}}
+\newcommand{\OtherTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{#1}}
+\newcommand{\PreprocessorTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{\textit{#1}}}
+\newcommand{\RegionMarkerTok}[1]{#1}
+\newcommand{\SpecialCharTok}[1]{\textcolor[rgb]{0.00,0.00,0.00}{#1}}
+\newcommand{\SpecialStringTok}[1]{\textcolor[rgb]{0.31,0.60,0.02}{#1}}
+\newcommand{\StringTok}[1]{\textcolor[rgb]{0.31,0.60,0.02}{#1}}
+\newcommand{\VariableTok}[1]{\textcolor[rgb]{0.00,0.00,0.00}{#1}}
+\newcommand{\VerbatimStringTok}[1]{\textcolor[rgb]{0.31,0.60,0.02}{#1}}
+\newcommand{\WarningTok}[1]{\textcolor[rgb]{0.56,0.35,0.01}{\textbf{\textit{#1}}}}
+\usepackage{longtable,booktabs}
+\usepackage{graphicx,grffile}
+\makeatletter
+\def\maxwidth{\ifdim\Gin@nat@width>\linewidth\linewidth\else\Gin@nat@width\fi}
+\def\maxheight{\ifdim\Gin@nat@height>\textheight\textheight\else\Gin@nat@height\fi}
+\makeatother
+% Scale images if necessary, so that they will not overflow the page
+% margins by default, and it is still possible to overwrite the defaults
+% using explicit options in \includegraphics[width, height, ...]{}
+\setkeys{Gin}{width=\maxwidth,height=\maxheight,keepaspectratio}
+\IfFileExists{parskip.sty}{%
+\usepackage{parskip}
+}{% else
+\setlength{\parindent}{0pt}
+\setlength{\parskip}{6pt plus 2pt minus 1pt}
+}
+\setlength{\emergencystretch}{3em}  % prevent overfull lines
+\providecommand{\tightlist}{%
+  \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
+\setcounter{secnumdepth}{5}
+% Redefines (sub)paragraphs to behave more like sections
+\ifx\paragraph\undefined\else
+\let\oldparagraph\paragraph
+\renewcommand{\paragraph}[1]{\oldparagraph{#1}\mbox{}}
+\fi
+\ifx\subparagraph\undefined\else
+\let\oldsubparagraph\subparagraph
+\renewcommand{\subparagraph}[1]{\oldsubparagraph{#1}\mbox{}}
+\fi
+
+%%% Use protect on footnotes to avoid problems with footnotes in titles
+\let\rmarkdownfootnote\footnote%
+\def\footnote{\protect\rmarkdownfootnote}
+
+%%% Change title format to be more compact
+\usepackage{titling}
+
+% Create subtitle command for use in maketitle
+\newcommand{\subtitle}[1]{
+  \posttitle{
+    \begin{center}\large#1\end{center}
+    }
+}
+
+\setlength{\droptitle}{-2em}
+
+  \title{Using kableExtra in Bookdown Projects}
+    \pretitle{\vspace{\droptitle}\centering\huge}
+  \posttitle{\par}
+    \author{Hao Zhu}
+    \preauthor{\centering\large\emph}
+  \postauthor{\par}
+      \predate{\centering\large\emph}
+  \postdate{\par}
+    \date{2018-10-03}
+
+\usepackage{booktabs}
+\usepackage{booktabs}
+\usepackage{longtable}
+\usepackage{array}
+\usepackage{multirow}
+\usepackage[table]{xcolor}
+\usepackage{wrapfig}
+\usepackage{float}
+\usepackage{colortbl}
+\usepackage{pdflscape}
+\usepackage{tabu}
+\usepackage{threeparttable}
+\usepackage{threeparttablex}
+\usepackage[normalem]{ulem}
+\usepackage{makecell}
+
+\begin{document}
+\maketitle
+
+{
+\setcounter{tocdepth}{1}
+\tableofcontents
+}
+\hypertarget{introduction}{%
+\chapter{Introduction}\label{introduction}}
+
+If you have tried to use \texttt{kableExtra} in a \texttt{bookdown}
+project with mutltiple formats, you may have experienced some problems.
+For example, you might not be able to render HTML and PDF tables at the
+same time using the same piece of code. At the same time, you might
+start to wonder if it's possible to create \texttt{bootstrap} style
+tables in \texttt{gitbook}. I will try to address these issues using
+this example.
+
+This book is hosted at
+\url{https://github.com/haozhu233/kableExtra/tree/master/docs}.
+
+You can find the source code for this project at
+\url{https://github.com/haozhu233/kableExtra/tree/master/docs}.
+
+\hypertarget{cross-format-tables-in-bookdown}{%
+\chapter{Cross-format Tables in
+Bookdown}\label{cross-format-tables-in-bookdown}}
+
+\begin{quote}
+Note that if kableExtra 0.9.0 doesn't support the EPUB format. If you
+need to output tables in \texttt{.epub}, please upgrade to the dev
+version or version 1.0 on CRAN once it's released.
+\end{quote}
+
+\hypertarget{use-the-k-m-approach-instead-of-m-k}{%
+\section{Use the ``K-M'' approach instead of
+``M-K''}\label{use-the-k-m-approach-instead-of-m-k}}
+
+Please read this chapter about the ``K-M''/``M-K'' approaches in
+\texttt{bookdown}:
+\url{https://bookdown.org/yihui/bookdown/new-session.html}
+
+To generate cross-format tables with \texttt{kableExtra} in a
+multi-format bookdown project, you will have to use the ``M-K'' approach
+by setting \texttt{new\_session:\ true} in \texttt{\_bookdown.yml}.
+Somehow the ``M-K'' approach, which merges chapters to a big Rmd and
+then renders, shares the global environment across formats. For now, I'm
+not sure if this is a bug or intended behavior. It might be fixable in
+the future but please don't count on that. By setting
+\texttt{new\_session:\ true}, we force R to use a new session for every
+chapter for different formats. In this way, tables are generated
+differently in different formats.
+
+Note that the ``M-K'' approach is slower than the ``K-M'' approach. At
+the same time, packages and data are not shared accross chapter.
+
+\begin{verbatim}
+# Example _bookdown.yml
+book_filename: "bookdown_example"
+delete_merged_file: true
+new_session: true
+language:
+  ui:
+    chapter_name: "Chapter "
+\end{verbatim}
+
+\hypertarget{prepare-your-tables-for-both-formats}{%
+\section{Prepare Your Tables for Both
+Formats}\label{prepare-your-tables-for-both-formats}}
+
+In most cases, functions in \texttt{kable} and \texttt{kableExtra} use
+the same API to accomplish the same styling task in HTML and LaTeX.
+However, you also need some format specific settings so your tables will
+look good in both formats. Some common items here include the
+\texttt{booktabs} and \texttt{longtable} settings in \texttt{kable} and
+the \texttt{bootstrap\_options} and \texttt{latex\_options} in
+\texttt{kable\_styling}.
+
+Here is an example for a table that will work in both HTML and LaTeX.
+
+\begin{Shaded}
+\begin{Highlighting}[]
+\KeywordTok{library}\NormalTok{(kableExtra)}
+\NormalTok{mtcars[}\DecValTok{1}\OperatorTok{:}\DecValTok{5}\NormalTok{, }\DecValTok{1}\OperatorTok{:}\DecValTok{5}\NormalTok{] }\OperatorTok{%>%}
+\StringTok{  }\KeywordTok{kable}\NormalTok{(}\DataTypeTok{booktabs =}\NormalTok{ T) }\OperatorTok{%>%}\StringTok{ }
+\StringTok{  }\KeywordTok{kable_styling}\NormalTok{(}
+    \DataTypeTok{latex_options =} \KeywordTok{c}\NormalTok{(}\StringTok{"striped"}\NormalTok{),}
+    \DataTypeTok{full_width =}\NormalTok{ F}
+\NormalTok{  ) }\OperatorTok{%>%}
+\StringTok{  }\KeywordTok{column_spec}\NormalTok{(}\DecValTok{1}\NormalTok{, }\DataTypeTok{bold =}\NormalTok{ T) }\OperatorTok{%>%}
+\StringTok{  }\KeywordTok{add_header_above}\NormalTok{(}\KeywordTok{c}\NormalTok{(}\StringTok{" "}\NormalTok{, }\StringTok{"Group A"}\NormalTok{ =}\StringTok{ }\DecValTok{2}\NormalTok{, }\StringTok{"Group B"}\NormalTok{ =}\StringTok{ }\DecValTok{3}\NormalTok{))}
+\end{Highlighting}
+\end{Shaded}
+
+\begin{table}[H]
+\centering\rowcolors{2}{gray!6}{white}
+
+\begin{tabular}{>{\bfseries}lrrrrr}
+\hiderowcolors
+\toprule
+\multicolumn{1}{c}{ } & \multicolumn{2}{c}{Group A} & \multicolumn{3}{c}{Group B} \\
+\cmidrule(l{3pt}r{3pt}){2-3} \cmidrule(l{3pt}r{3pt}){4-6}
+  & mpg & cyl & disp & hp & drat\\
+\midrule
+\showrowcolors
+Mazda RX4 & 21.0 & 6 & 160 & 110 & 3.90\\
+Mazda RX4 Wag & 21.0 & 6 & 160 & 110 & 3.90\\
+Datsun 710 & 22.8 & 4 & 108 & 93 & 3.85\\
+Hornet 4 Drive & 21.4 & 6 & 258 & 110 & 3.08\\
+Hornet Sportabout & 18.7 & 8 & 360 & 175 & 3.15\\
+\bottomrule
+\end{tabular}
+\rowcolors{2}{white}{white}
+\end{table}
+
+\hypertarget{use-bootstrap-tables-in-gitbooks-epub}{%
+\chapter{Use Bootstrap Tables in gitbooks \&
+epub}\label{use-bootstrap-tables-in-gitbooks-epub}}
+
+\hypertarget{gitbook}{%
+\section{Gitbook}\label{gitbook}}
+
+Most of \texttt{kableExtra} tricks will work in \texttt{bookdown} except
+those requires \href{http://getbootstrap.com/}{\texttt{bootstrap}}. By
+default, \texttt{rmarkdown} won't load \texttt{bootstrap} for you on
+gitbook as it's not necesary. In \texttt{kableExtra}, I used the
+\href{https://getbootstrap.com/docs/3.3/customize/}{bootstrap 3.3.7
+customization tool} and made a customized css copy. You can load it by
+setting \texttt{options(kableExtra.html.bsTable\ =\ T)}.
+
+\begin{Shaded}
+\begin{Highlighting}[]
+\KeywordTok{library}\NormalTok{(kableExtra)}
+\KeywordTok{options}\NormalTok{(}\DataTypeTok{kableExtra.html.bsTable =}\NormalTok{ T)}
+
+\NormalTok{mtcars[}\DecValTok{1}\OperatorTok{:}\DecValTok{5}\NormalTok{, }\DecValTok{1}\OperatorTok{:}\DecValTok{5}\NormalTok{] }\OperatorTok{%>%}
+\StringTok{  }\KeywordTok{kable}\NormalTok{(}\DataTypeTok{booktabs =}\NormalTok{ T) }\OperatorTok{%>%}\StringTok{ }
+\StringTok{  }\KeywordTok{kable_styling}\NormalTok{(}
+    \DataTypeTok{bootstrap_options =} \KeywordTok{c}\NormalTok{(}\StringTok{"striped"}\NormalTok{,}\StringTok{"hover"}\NormalTok{, }\StringTok{"bordered"}\NormalTok{),}
+    \DataTypeTok{latex_options =} \KeywordTok{c}\NormalTok{(}\StringTok{"striped"}\NormalTok{),}
+    \DataTypeTok{full_width =}\NormalTok{ F}
+\NormalTok{  ) }\OperatorTok{%>%}
+\StringTok{  }\KeywordTok{column_spec}\NormalTok{(}\DecValTok{1}\NormalTok{, }\DataTypeTok{color =} \StringTok{"red"}\NormalTok{) }\OperatorTok{%>%}
+\StringTok{  }\KeywordTok{add_header_above}\NormalTok{(}\KeywordTok{c}\NormalTok{(}\StringTok{" "}\NormalTok{, }\StringTok{"Group A"}\NormalTok{ =}\StringTok{ }\DecValTok{2}\NormalTok{, }\StringTok{"Group B"}\NormalTok{ =}\StringTok{ }\DecValTok{3}\NormalTok{))}
+\end{Highlighting}
+\end{Shaded}
+
+\begin{table}[H]
+\centering\rowcolors{2}{gray!6}{white}
+
+\begin{tabular}{>{\leavevmode\color{red}}lrrrrr}
+\hiderowcolors
+\toprule
+\multicolumn{1}{c}{ } & \multicolumn{2}{c}{Group A} & \multicolumn{3}{c}{Group B} \\
+\cmidrule(l{3pt}r{3pt}){2-3} \cmidrule(l{3pt}r{3pt}){4-6}
+  & mpg & cyl & disp & hp & drat\\
+\midrule
+\showrowcolors
+Mazda RX4 & 21.0 & 6 & 160 & 110 & 3.90\\
+Mazda RX4 Wag & 21.0 & 6 & 160 & 110 & 3.90\\
+Datsun 710 & 22.8 & 4 & 108 & 93 & 3.85\\
+Hornet 4 Drive & 21.4 & 6 & 258 & 110 & 3.08\\
+Hornet Sportabout & 18.7 & 8 & 360 & 175 & 3.15\\
+\bottomrule
+\end{tabular}
+\rowcolors{2}{white}{white}
+\end{table}
+
+However, very unfortunately, as we can see, the \texttt{hover} part is
+not working and the table still looks different from a regular bootstrap
+table. The reason is that gitbook defines its own way to style tables
+and some of its rules are conflicting with the one defined in bootstrap.
+For css, it's like once you load something, it's impossible to really
+unload it. As a result, unless there are some changes in
+\texttt{bookdown} (for example, we can replace the gitbook table part
+with bootstrap tables), there is nothing we can do here.
+
+\hypertarget{epub}{%
+\section{Epub}\label{epub}}
+
+Right now, it's impossible to load addition CSS through HTML dependency
+(due to a setting in rmarkdown). I will file an issue in
+\texttt{rmarkdown} and see if this is something that can be changed. In
+the mean time, to use bootstrap tables in Epub, you will have to
+manually load
+\href{https://github.com/haozhu233/kableExtra/blob/master/inst/bootstrapTable-3.3.7/bootstrapTable.min.css}{this
+stylesheet} by putting it to a CSS file (such as ``style.css'') and load
+it in \texttt{\_output.yml}. For example,
+
+\begin{verbatim}
+bookdown::epub_book: 
+  stylesheet: style.css
+\end{verbatim}
+
+\bibliography{book.bib,packages.bib}
+
+
+\end{document}
diff --git a/docs/bookdown_example/_book/cross-format-tables-in-bookdown.html b/docs/bookdown_example/_book/cross-format-tables-in-bookdown.html
new file mode 100644
index 0000000..c45999e
--- /dev/null
+++ b/docs/bookdown_example/_book/cross-format-tables-in-bookdown.html
@@ -0,0 +1,381 @@
+<!DOCTYPE html>
+<html >
+
+<head>
+
+  <meta charset="UTF-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <title>Using kableExtra in Bookdown Projects</title>
+  <meta name="description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects.">
+  <meta name="generator" content="bookdown  and GitBook 2.6.7">
+
+  <meta property="og:title" content="Using kableExtra in Bookdown Projects" />
+  <meta property="og:type" content="book" />
+  
+  
+  <meta property="og:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
+  
+
+  <meta name="twitter:card" content="summary" />
+  <meta name="twitter:title" content="Using kableExtra in Bookdown Projects" />
+  
+  <meta name="twitter:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
+  
+
+<meta name="author" content="Hao Zhu">
+
+
+<meta name="date" content="2018-10-03">
+
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black">
+  
+  
+<link rel="prev" href="index.html">
+<link rel="next" href="use-bootstrap-tables-in-gitbooks-epub.html">
+<script src="libs/jquery-2.2.3/jquery.min.js"></script>
+<link href="libs/gitbook-2.6.7/css/style.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-bookdown.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-highlight.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-search.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-fontsettings.css" rel="stylesheet" />
+
+
+
+
+
+
+
+<script src="libs/kePrint-0.0.1/kePrint.js"></script>
+<link href="libs/bsTable-3.3.7/bootstrapTable.min.css" rel="stylesheet" />
+
+
+<style type="text/css">
+a.sourceLine { display: inline-block; line-height: 1.25; }
+a.sourceLine { pointer-events: none; color: inherit; text-decoration: inherit; }
+a.sourceLine:empty { height: 1.2em; position: absolute; }
+.sourceCode { overflow: visible; }
+code.sourceCode { white-space: pre; position: relative; }
+div.sourceCode { margin: 1em 0; }
+pre.sourceCode { margin: 0; }
+@media screen {
+div.sourceCode { overflow: auto; }
+}
+@media print {
+code.sourceCode { white-space: pre-wrap; }
+a.sourceLine { text-indent: -1em; padding-left: 1em; }
+}
+pre.numberSource a.sourceLine
+  { position: relative; }
+pre.numberSource a.sourceLine:empty
+  { position: absolute; }
+pre.numberSource a.sourceLine::before
+  { content: attr(data-line-number);
+    position: absolute; left: -5em; text-align: right; vertical-align: baseline;
+    border: none; pointer-events: all;
+    -webkit-touch-callout: none; -webkit-user-select: none;
+    -khtml-user-select: none; -moz-user-select: none;
+    -ms-user-select: none; user-select: none;
+    padding: 0 4px; width: 4em;
+    color: #aaaaaa;
+  }
+pre.numberSource { margin-left: 3em; border-left: 1px solid #aaaaaa;  padding-left: 4px; }
+div.sourceCode
+  {  }
+@media screen {
+a.sourceLine::before { text-decoration: underline; }
+}
+code span.al { color: #ff0000; font-weight: bold; } /* Alert */
+code span.an { color: #60a0b0; font-weight: bold; font-style: italic; } /* Annotation */
+code span.at { color: #7d9029; } /* Attribute */
+code span.bn { color: #40a070; } /* BaseN */
+code span.bu { } /* BuiltIn */
+code span.cf { color: #007020; font-weight: bold; } /* ControlFlow */
+code span.ch { color: #4070a0; } /* Char */
+code span.cn { color: #880000; } /* Constant */
+code span.co { color: #60a0b0; font-style: italic; } /* Comment */
+code span.cv { color: #60a0b0; font-weight: bold; font-style: italic; } /* CommentVar */
+code span.do { color: #ba2121; font-style: italic; } /* Documentation */
+code span.dt { color: #902000; } /* DataType */
+code span.dv { color: #40a070; } /* DecVal */
+code span.er { color: #ff0000; font-weight: bold; } /* Error */
+code span.ex { } /* Extension */
+code span.fl { color: #40a070; } /* Float */
+code span.fu { color: #06287e; } /* Function */
+code span.im { } /* Import */
+code span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Information */
+code span.kw { color: #007020; font-weight: bold; } /* Keyword */
+code span.op { color: #666666; } /* Operator */
+code span.ot { color: #007020; } /* Other */
+code span.pp { color: #bc7a00; } /* Preprocessor */
+code span.sc { color: #4070a0; } /* SpecialChar */
+code span.ss { color: #bb6688; } /* SpecialString */
+code span.st { color: #4070a0; } /* String */
+code span.va { color: #19177c; } /* Variable */
+code span.vs { color: #4070a0; } /* VerbatimString */
+code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */
+</style>
+
+</head>
+
+<body>
+
+
+
+  <div class="book without-animation with-summary font-size-2 font-family-1" data-basepath=".">
+
+    <div class="book-summary">
+      <nav role="navigation">
+
+<ul class="summary">
+<li class="chapter" data-level="1" data-path="index.html"><a href="index.html"><i class="fa fa-check"></i><b>1</b> Introduction</a></li>
+<li class="chapter" data-level="2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html"><i class="fa fa-check"></i><b>2</b> Cross-format Tables in Bookdown</a><ul>
+<li class="chapter" data-level="2.1" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#use-the-k-m-approach-instead-of-m-k"><i class="fa fa-check"></i><b>2.1</b> Use the “K-M” approach instead of “M-K”</a></li>
+<li class="chapter" data-level="2.2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#prepare-your-tables-for-both-formats"><i class="fa fa-check"></i><b>2.2</b> Prepare Your Tables for Both Formats</a></li>
+</ul></li>
+<li class="chapter" data-level="3" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html"><i class="fa fa-check"></i><b>3</b> Use Bootstrap Tables in gitbooks &amp; epub</a><ul>
+<li class="chapter" data-level="3.1" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html#gitbook"><i class="fa fa-check"></i><b>3.1</b> Gitbook</a></li>
+<li class="chapter" data-level="3.2" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html#epub"><i class="fa fa-check"></i><b>3.2</b> Epub</a></li>
+</ul></li>
+</ul>
+
+      </nav>
+    </div>
+
+    <div class="book-body">
+      <div class="body-inner">
+        <div class="book-header" role="navigation">
+          <h1>
+            <i class="fa fa-circle-o-notch fa-spin"></i><a href="./">Using kableExtra in Bookdown Projects</a>
+          </h1>
+        </div>
+
+        <div class="page-wrapper" tabindex="-1" role="main">
+          <div class="page-inner">
+
+            <section class="normal" id="section-">
+<div id="cross-format-tables-in-bookdown" class="section level1">
+<h1><span class="header-section-number">Chapter 2</span> Cross-format Tables in Bookdown</h1>
+<blockquote>
+<p>Note that if kableExtra 0.9.0 doesn’t support the EPUB format. If you need to output tables in <code>.epub</code>, please upgrade to the dev version or version 1.0 on CRAN once it’s released.</p>
+</blockquote>
+<div id="use-the-k-m-approach-instead-of-m-k" class="section level2">
+<h2><span class="header-section-number">2.1</span> Use the “K-M” approach instead of “M-K”</h2>
+<p>Please read this chapter about the “K-M”/“M-K” approaches in <code>bookdown</code>:
+<a href="https://bookdown.org/yihui/bookdown/new-session.html" class="uri">https://bookdown.org/yihui/bookdown/new-session.html</a></p>
+<p>To generate cross-format tables with <code>kableExtra</code> in a multi-format bookdown project, you will have to use the “M-K” approach by setting <code>new_session: true</code> in <code>_bookdown.yml</code>. Somehow the “M-K” approach, which merges chapters to a big Rmd and then renders, shares the global environment across formats. For now, I’m not sure if this is a bug or intended behavior. It might be fixable in the future but please don’t count on that. By setting <code>new_session: true</code>, we force R to use a new session for every chapter for different formats. In this way, tables are generated differently in different formats.</p>
+<p>Note that the “M-K” approach is slower than the “K-M” approach. At the same time, packages and data are not shared accross chapter.</p>
+<pre><code># Example _bookdown.yml
+book_filename: &quot;bookdown_example&quot;
+delete_merged_file: true
+new_session: true
+language:
+  ui:
+    chapter_name: &quot;Chapter &quot;</code></pre>
+</div>
+<div id="prepare-your-tables-for-both-formats" class="section level2">
+<h2><span class="header-section-number">2.2</span> Prepare Your Tables for Both Formats</h2>
+<p>In most cases, functions in <code>kable</code> and <code>kableExtra</code> use the same API to accomplish the same styling task in HTML and LaTeX. However, you also need some format specific settings so your tables will look good in both formats. Some common items here include the <code>booktabs</code> and <code>longtable</code> settings in <code>kable</code> and the <code>bootstrap_options</code> and <code>latex_options</code> in <code>kable_styling</code>.</p>
+<p>Here is an example for a table that will work in both HTML and LaTeX.</p>
+<pre class="sourceCode r"><code class="sourceCode r"><span class="kw">library</span>(kableExtra)
+mtcars[<span class="dv">1</span><span class="op">:</span><span class="dv">5</span>, <span class="dv">1</span><span class="op">:</span><span class="dv">5</span>] <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">kable</span>(<span class="dt">booktabs =</span> T) <span class="op">%&gt;%</span><span class="st"> </span>
+<span class="st">  </span><span class="kw">kable_styling</span>(
+    <span class="dt">latex_options =</span> <span class="kw">c</span>(<span class="st">&quot;striped&quot;</span>),
+    <span class="dt">full_width =</span> F
+  ) <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">column_spec</span>(<span class="dv">1</span>, <span class="dt">bold =</span> T) <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">add_header_above</span>(<span class="kw">c</span>(<span class="st">&quot; &quot;</span>, <span class="st">&quot;Group A&quot;</span> =<span class="st"> </span><span class="dv">2</span>, <span class="st">&quot;Group B&quot;</span> =<span class="st"> </span><span class="dv">3</span>))</code></pre>
+<table class="table" style="width: auto !important; margin-left: auto; margin-right: auto;">
+<thead>
+<tr>
+<th style="border-bottom:hidden" colspan="1">
+</th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="2">
+<div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">
+Group A
+</div>
+</th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="3">
+<div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">
+Group B
+</div>
+</th>
+</tr>
+<tr>
+<th style="text-align:left;">
+</th>
+<th style="text-align:right;">
+mpg
+</th>
+<th style="text-align:right;">
+cyl
+</th>
+<th style="text-align:right;">
+disp
+</th>
+<th style="text-align:right;">
+hp
+</th>
+<th style="text-align:right;">
+drat
+</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td style="text-align:left;font-weight: bold;">
+Mazda RX4
+</td>
+<td style="text-align:right;">
+21.0
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+160
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.90
+</td>
+</tr>
+<tr>
+<td style="text-align:left;font-weight: bold;">
+Mazda RX4 Wag
+</td>
+<td style="text-align:right;">
+21.0
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+160
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.90
+</td>
+</tr>
+<tr>
+<td style="text-align:left;font-weight: bold;">
+Datsun 710
+</td>
+<td style="text-align:right;">
+22.8
+</td>
+<td style="text-align:right;">
+4
+</td>
+<td style="text-align:right;">
+108
+</td>
+<td style="text-align:right;">
+93
+</td>
+<td style="text-align:right;">
+3.85
+</td>
+</tr>
+<tr>
+<td style="text-align:left;font-weight: bold;">
+Hornet 4 Drive
+</td>
+<td style="text-align:right;">
+21.4
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+258
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.08
+</td>
+</tr>
+<tr>
+<td style="text-align:left;font-weight: bold;">
+Hornet Sportabout
+</td>
+<td style="text-align:right;">
+18.7
+</td>
+<td style="text-align:right;">
+8
+</td>
+<td style="text-align:right;">
+360
+</td>
+<td style="text-align:right;">
+175
+</td>
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+<!DOCTYPE html>
+<html >
+
+<head>
+
+  <meta charset="UTF-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <title>Using kableExtra in Bookdown Projects</title>
+  <meta name="description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects.">
+  <meta name="generator" content="bookdown  and GitBook 2.6.7">
+
+  <meta property="og:title" content="Using kableExtra in Bookdown Projects" />
+  <meta property="og:type" content="book" />
+  
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+  <meta property="og:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
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+  <meta name="twitter:card" content="summary" />
+  <meta name="twitter:title" content="Using kableExtra in Bookdown Projects" />
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+  <meta name="twitter:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
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+<meta name="author" content="Hao Zhu">
+
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+<meta name="date" content="2018-10-03">
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+
+    <div class="book-summary">
+      <nav role="navigation">
+
+<ul class="summary">
+<li class="chapter" data-level="1" data-path="index.html"><a href="index.html"><i class="fa fa-check"></i><b>1</b> Introduction</a></li>
+<li class="chapter" data-level="2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html"><i class="fa fa-check"></i><b>2</b> Cross-format Tables in Bookdown</a><ul>
+<li class="chapter" data-level="2.1" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#use-the-k-m-approach-instead-of-m-k"><i class="fa fa-check"></i><b>2.1</b> Use the “K-M” approach instead of “M-K”</a></li>
+<li class="chapter" data-level="2.2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#prepare-your-tables-for-both-formats"><i class="fa fa-check"></i><b>2.2</b> Prepare Your Tables for Both Formats</a></li>
+</ul></li>
+<li class="chapter" data-level="3" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html"><i class="fa fa-check"></i><b>3</b> Use Bootstrap Tables in gitbooks &amp; epub</a><ul>
+<li class="chapter" data-level="3.1" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html#gitbook"><i class="fa fa-check"></i><b>3.1</b> Gitbook</a></li>
+<li class="chapter" data-level="3.2" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html#epub"><i class="fa fa-check"></i><b>3.2</b> Epub</a></li>
+</ul></li>
+</ul>
+
+      </nav>
+    </div>
+
+    <div class="book-body">
+      <div class="body-inner">
+        <div class="book-header" role="navigation">
+          <h1>
+            <i class="fa fa-circle-o-notch fa-spin"></i><a href="./">Using kableExtra in Bookdown Projects</a>
+          </h1>
+        </div>
+
+        <div class="page-wrapper" tabindex="-1" role="main">
+          <div class="page-inner">
+
+            <section class="normal" id="section-">
+<div id="header">
+<h1 class="title">Using kableExtra in Bookdown Projects</h1>
+<p class="author"><em>Hao Zhu</em></p>
+<p class="date"><em>2018-10-03</em></p>
+</div>
+<div id="introduction" class="section level1">
+<h1><span class="header-section-number">Chapter 1</span> Introduction</h1>
+<p>If you have tried to use <code>kableExtra</code> in a <code>bookdown</code> project with mutltiple formats, you may have experienced some problems. For example, you might not be able to render HTML and PDF tables at the same time using the same piece of code. At the same time, you might start to wonder if it’s possible to create <code>bootstrap</code> style tables in <code>gitbook</code>. I will try to address these issues using this example.</p>
+<p>This book is hosted at <a href="https://github.com/haozhu233/kableExtra/tree/master/docs" class="uri">https://github.com/haozhu233/kableExtra/tree/master/docs</a>.</p>
+<p>You can find the source code for this project at <a href="https://github.com/haozhu233/kableExtra/tree/master/docs" class="uri">https://github.com/haozhu233/kableExtra/tree/master/docs</a>.</p>
+
+</div>
+            </section>
+
+          </div>
+        </div>
+      </div>
+
+<a href="cross-format-tables-in-bookdown.html" class="navigation navigation-next navigation-unique" aria-label="Next page"><i class="fa fa-angle-right"></i></a>
+    </div>
+  </div>
+<script src="libs/gitbook-2.6.7/js/app.min.js"></script>
+<script src="libs/gitbook-2.6.7/js/lunr.js"></script>
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diff --git a/docs/bookdown_example/_book/index.md b/docs/bookdown_example/_book/index.md
new file mode 100644
index 0000000..feed0b4
--- /dev/null
+++ b/docs/bookdown_example/_book/index.md
@@ -0,0 +1,19 @@
+--- 
+title: "Using kableExtra in Bookdown Projects"
+author: "Hao Zhu"
+date: "2018-10-03"
+site: bookdown::bookdown_site
+documentclass: book
+bibliography: [book.bib, packages.bib]
+biblio-style: apalike
+link-citations: yes
+description: "This example provides documentations for using kableExtra to customize tables in bookdown projects. "
+---
+
+# Introduction
+
+If you have tried to use `kableExtra` in a `bookdown` project with mutltiple formats, you may have experienced some problems. For example, you might not be able to render HTML and PDF tables at the same time using the same piece of code. At the same time, you might start to wonder if it's possible to create `bootstrap` style tables in `gitbook`. I will try to address these issues using this example. 
+
+This book is hosted at https://github.com/haozhu233/kableExtra/tree/master/docs.
+
+You can find the source code for this project at https://github.com/haozhu233/kableExtra/tree/master/docs.
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diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/fontawesome/fontawesome-webfont.ttf b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/fontawesome/fontawesome-webfont.ttf
new file mode 100644
index 0000000..35acda2
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/fontawesome/fontawesome-webfont.ttf
Binary files differ
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-bookdown.css b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-bookdown.css
new file mode 100644
index 0000000..8e5bb8a
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-bookdown.css
@@ -0,0 +1,99 @@
+.book .book-header h1 {
+  padding-left: 20px;
+  padding-right: 20px;
+}
+.book .book-header.fixed {
+  position: fixed;
+  right: 0;
+  top: 0;
+  left: 0;
+  border-bottom: 1px solid rgba(0,0,0,.07);
+}
+span.search-highlight {
+  background-color: #ffff88;
+}
+@media (min-width: 600px) {
+  .book.with-summary .book-header.fixed {
+    left: 300px;
+  }
+}
+@media (max-width: 1240px) {
+  .book .book-body.fixed {
+    top: 50px;
+  }
+  .book .book-body.fixed .body-inner {
+    top: auto;
+  }
+}
+@media (max-width: 600px) {
+  .book.with-summary .book-header.fixed {
+    left: calc(100% - 60px);
+    min-width: 300px;
+  }
+  .book.with-summary .book-body {
+    transform: none;
+    left: calc(100% - 60px);
+    min-width: 300px;
+  }
+  .book .book-body.fixed {
+    top: 0;
+  }
+}
+
+.book .book-body.fixed .body-inner {
+  top: 50px;
+}
+.book .book-body .page-wrapper .page-inner section.normal sub, .book .book-body .page-wrapper .page-inner section.normal sup {
+  font-size: 85%;
+}
+
+@media print {
+  .book .book-summary, .book .book-body .book-header, .fa {
+    display: none !important;
+  }
+  .book .book-body.fixed {
+    left: 0px;
+  }
+  .book .book-body,.book .book-body .body-inner, .book.with-summary {
+    overflow: visible !important;
+  }
+}
+.kable_wrapper {
+  border-spacing: 20px 0;
+  border-collapse: separate;
+  border: none;
+  margin: auto;
+}
+.kable_wrapper > tbody > tr > td {
+  vertical-align: top;
+}
+.book .book-body .page-wrapper .page-inner section.normal table tr.header {
+  border-top-width: 2px;
+}
+.book .book-body .page-wrapper .page-inner section.normal table tr:last-child td {
+  border-bottom-width: 2px;
+}
+.book .book-body .page-wrapper .page-inner section.normal table td, .book .book-body .page-wrapper .page-inner section.normal table th {
+  border-left: none;
+  border-right: none;
+}
+.book .book-body .page-wrapper .page-inner section.normal table.kable_wrapper > tbody > tr, .book .book-body .page-wrapper .page-inner section.normal table.kable_wrapper > tbody > tr > td {
+  border-top: none;
+}
+.book .book-body .page-wrapper .page-inner section.normal table.kable_wrapper > tbody > tr:last-child > td {
+    border-bottom: none;
+}
+
+div.theorem, div.lemma, div.corollary, div.proposition, div.conjecture {
+  font-style: italic;
+}
+span.theorem, span.lemma, span.corollary, span.proposition, span.conjecture {
+  font-style: normal;
+}
+div.proof:after {
+  content: "\25a2";
+  float: right;
+}
+.header-section-number {
+  padding-right: .5em;
+}
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-fontsettings.css b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-fontsettings.css
new file mode 100644
index 0000000..87236b4
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-fontsettings.css
@@ -0,0 +1,292 @@
+/*
+ * Theme 1
+ */
+.color-theme-1 .dropdown-menu {
+  background-color: #111111;
+  border-color: #7e888b;
+}
+.color-theme-1 .dropdown-menu .dropdown-caret .caret-inner {
+  border-bottom: 9px solid #111111;
+}
+.color-theme-1 .dropdown-menu .buttons {
+  border-color: #7e888b;
+}
+.color-theme-1 .dropdown-menu .button {
+  color: #afa790;
+}
+.color-theme-1 .dropdown-menu .button:hover {
+  color: #73553c;
+}
+/*
+ * Theme 2
+ */
+.color-theme-2 .dropdown-menu {
+  background-color: #2d3143;
+  border-color: #272a3a;
+}
+.color-theme-2 .dropdown-menu .dropdown-caret .caret-inner {
+  border-bottom: 9px solid #2d3143;
+}
+.color-theme-2 .dropdown-menu .buttons {
+  border-color: #272a3a;
+}
+.color-theme-2 .dropdown-menu .button {
+  color: #62677f;
+}
+.color-theme-2 .dropdown-menu .button:hover {
+  color: #f4f4f5;
+}
+.book .book-header .font-settings .font-enlarge {
+  line-height: 30px;
+  font-size: 1.4em;
+}
+.book .book-header .font-settings .font-reduce {
+  line-height: 30px;
+  font-size: 1em;
+}
+.book.color-theme-1 .book-body {
+  color: #704214;
+  background: #f3eacb;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section {
+  background: #f3eacb;
+}
+.book.color-theme-2 .book-body {
+  color: #bdcadb;
+  background: #1c1f2b;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section {
+  background: #1c1f2b;
+}
+.book.font-size-0 .book-body .page-inner section {
+  font-size: 1.2rem;
+}
+.book.font-size-1 .book-body .page-inner section {
+  font-size: 1.4rem;
+}
+.book.font-size-2 .book-body .page-inner section {
+  font-size: 1.6rem;
+}
+.book.font-size-3 .book-body .page-inner section {
+  font-size: 2.2rem;
+}
+.book.font-size-4 .book-body .page-inner section {
+  font-size: 4rem;
+}
+.book.font-family-0 {
+  font-family: Georgia, serif;
+}
+.book.font-family-1 {
+  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal {
+  color: #704214;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal a {
+  color: inherit;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h1,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h2,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h3,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h4,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h5,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h6 {
+  color: inherit;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h1,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h2 {
+  border-color: inherit;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal h6 {
+  color: inherit;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal hr {
+  background-color: inherit;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal blockquote {
+  border-color: #c4b29f;
+  opacity: 0.9;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal pre,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal code {
+  background: #fdf6e3;
+  color: #657b83;
+  border-color: #f8df9c;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal .highlight {
+  background-color: inherit;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal table th,
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal table td {
+  border-color: #f5d06c;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal table tr {
+  color: inherit;
+  background-color: #fdf6e3;
+  border-color: #444444;
+}
+.book.color-theme-1 .book-body .page-wrapper .page-inner section.normal table tr:nth-child(2n) {
+  background-color: #fbeecb;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal {
+  color: #bdcadb;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal a {
+  color: #3eb1d0;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h1,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h2,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h3,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h4,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h5,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h6 {
+  color: #fffffa;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h1,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h2 {
+  border-color: #373b4e;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal h6 {
+  color: #373b4e;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal hr {
+  background-color: #373b4e;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal blockquote {
+  border-color: #373b4e;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal pre,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal code {
+  color: #9dbed8;
+  background: #2d3143;
+  border-color: #2d3143;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal .highlight {
+  background-color: #282a39;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal table th,
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal table td {
+  border-color: #3b3f54;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal table tr {
+  color: #b6c2d2;
+  background-color: #2d3143;
+  border-color: #3b3f54;
+}
+.book.color-theme-2 .book-body .page-wrapper .page-inner section.normal table tr:nth-child(2n) {
+  background-color: #35394b;
+}
+.book.color-theme-1 .book-header {
+  color: #afa790;
+  background: transparent;
+}
+.book.color-theme-1 .book-header .btn {
+  color: #afa790;
+}
+.book.color-theme-1 .book-header .btn:hover {
+  color: #73553c;
+  background: none;
+}
+.book.color-theme-1 .book-header h1 {
+  color: #704214;
+}
+.book.color-theme-2 .book-header {
+  color: #7e888b;
+  background: transparent;
+}
+.book.color-theme-2 .book-header .btn {
+  color: #3b3f54;
+}
+.book.color-theme-2 .book-header .btn:hover {
+  color: #fffff5;
+  background: none;
+}
+.book.color-theme-2 .book-header h1 {
+  color: #bdcadb;
+}
+.book.color-theme-1 .book-body .navigation {
+  color: #afa790;
+}
+.book.color-theme-1 .book-body .navigation:hover {
+  color: #73553c;
+}
+.book.color-theme-2 .book-body .navigation {
+  color: #383f52;
+}
+.book.color-theme-2 .book-body .navigation:hover {
+  color: #fffff5;
+}
+/*
+ * Theme 1
+ */
+.book.color-theme-1 .book-summary {
+  color: #afa790;
+  background: #111111;
+  border-right: 1px solid rgba(0, 0, 0, 0.07);
+}
+.book.color-theme-1 .book-summary .book-search {
+  background: transparent;
+}
+.book.color-theme-1 .book-summary .book-search input,
+.book.color-theme-1 .book-summary .book-search input:focus {
+  border: 1px solid transparent;
+}
+.book.color-theme-1 .book-summary ul.summary li.divider {
+  background: #7e888b;
+  box-shadow: none;
+}
+.book.color-theme-1 .book-summary ul.summary li i.fa-check {
+  color: #33cc33;
+}
+.book.color-theme-1 .book-summary ul.summary li.done > a {
+  color: #877f6a;
+}
+.book.color-theme-1 .book-summary ul.summary li a,
+.book.color-theme-1 .book-summary ul.summary li span {
+  color: #877f6a;
+  background: transparent;
+  font-weight: normal;
+}
+.book.color-theme-1 .book-summary ul.summary li.active > a,
+.book.color-theme-1 .book-summary ul.summary li a:hover {
+  color: #704214;
+  background: transparent;
+  font-weight: normal;
+}
+/*
+ * Theme 2
+ */
+.book.color-theme-2 .book-summary {
+  color: #bcc1d2;
+  background: #2d3143;
+  border-right: none;
+}
+.book.color-theme-2 .book-summary .book-search {
+  background: transparent;
+}
+.book.color-theme-2 .book-summary .book-search input,
+.book.color-theme-2 .book-summary .book-search input:focus {
+  border: 1px solid transparent;
+}
+.book.color-theme-2 .book-summary ul.summary li.divider {
+  background: #272a3a;
+  box-shadow: none;
+}
+.book.color-theme-2 .book-summary ul.summary li i.fa-check {
+  color: #33cc33;
+}
+.book.color-theme-2 .book-summary ul.summary li.done > a {
+  color: #62687f;
+}
+.book.color-theme-2 .book-summary ul.summary li a,
+.book.color-theme-2 .book-summary ul.summary li span {
+  color: #c1c6d7;
+  background: transparent;
+  font-weight: 600;
+}
+.book.color-theme-2 .book-summary ul.summary li.active > a,
+.book.color-theme-2 .book-summary ul.summary li a:hover {
+  color: #f4f4f5;
+  background: #252737;
+  font-weight: 600;
+}
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-highlight.css b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-highlight.css
new file mode 100644
index 0000000..2aabd3d
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-highlight.css
@@ -0,0 +1,426 @@
+.book .book-body .page-wrapper .page-inner section.normal pre,
+.book .book-body .page-wrapper .page-inner section.normal code {
+  /* http://jmblog.github.com/color-themes-for-google-code-highlightjs */
+  /* Tomorrow Comment */
+  /* Tomorrow Red */
+  /* Tomorrow Orange */
+  /* Tomorrow Yellow */
+  /* Tomorrow Green */
+  /* Tomorrow Aqua */
+  /* Tomorrow Blue */
+  /* Tomorrow Purple */
+}
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-comment,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-comment,
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-title,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-title {
+  color: #8e908c;
+}
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-variable,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-variable,
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-attribute,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-attribute,
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-tag,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-tag,
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-regexp,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-regexp,
+.book .book-body .page-wrapper .page-inner section.normal pre .ruby .hljs-constant,
+.book .book-body .page-wrapper .page-inner section.normal code .ruby .hljs-constant,
+.book .book-body .page-wrapper .page-inner section.normal pre .xml .hljs-tag .hljs-title,
+.book .book-body .page-wrapper .page-inner section.normal code .xml .hljs-tag .hljs-title,
+.book .book-body .page-wrapper .page-inner section.normal pre .xml .hljs-pi,
+.book .book-body .page-wrapper .page-inner section.normal code .xml .hljs-pi,
+.book .book-body .page-wrapper .page-inner section.normal pre .xml .hljs-doctype,
+.book .book-body .page-wrapper .page-inner section.normal code .xml .hljs-doctype,
+.book .book-body .page-wrapper .page-inner section.normal pre .html .hljs-doctype,
+.book .book-body .page-wrapper .page-inner section.normal code .html .hljs-doctype,
+.book .book-body .page-wrapper .page-inner section.normal pre .css .hljs-id,
+.book .book-body .page-wrapper .page-inner section.normal code .css .hljs-id,
+.book .book-body .page-wrapper .page-inner section.normal pre .css .hljs-class,
+.book .book-body .page-wrapper .page-inner section.normal code .css .hljs-class,
+.book .book-body .page-wrapper .page-inner section.normal pre .css .hljs-pseudo,
+.book .book-body .page-wrapper .page-inner section.normal code .css .hljs-pseudo {
+  color: #c82829;
+}
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-number,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-number,
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-preprocessor,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-preprocessor,
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-pragma,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-pragma,
+.book .book-body .page-wrapper .page-inner section.normal pre .hljs-built_in,
+.book .book-body .page-wrapper .page-inner section.normal code .hljs-built_in,
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+  /*
+
+Orginal Style from ethanschoonover.com/solarized (c) Jeremy Hull <sourdrums@gmail.com>
+
+*/
+  /* Solarized Green */
+  /* Solarized Cyan */
+  /* Solarized Blue */
+  /* Solarized Yellow */
+  /* Solarized Orange */
+  /* Solarized Red */
+  /* Solarized Violet */
+}
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+  /* Tomorrow Night Bright Theme */
+  /* Original theme - https://github.com/chriskempson/tomorrow-theme */
+  /* http://jmblog.github.com/color-themes-for-google-code-highlightjs */
+  /* Tomorrow Comment */
+  /* Tomorrow Red */
+  /* Tomorrow Orange */
+  /* Tomorrow Yellow */
+  /* Tomorrow Green */
+  /* Tomorrow Aqua */
+  /* Tomorrow Blue */
+  /* Tomorrow Purple */
+}
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new file mode 100644
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+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/plugin-search.css
@@ -0,0 +1,28 @@
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+  padding: 6px;
+  background: transparent;
+  position: absolute;
+  top: -50px;
+  left: 0px;
+  right: 0px;
+  transition: top 0.5s ease;
+}
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+.book .book-summary .book-search input:focus,
+.book .book-summary .book-search input:hover {
+  width: 100%;
+  background: transparent;
+  border: 1px solid #ccc;
+  box-shadow: none;
+  outline: none;
+  line-height: 22px;
+  padding: 7px 4px;
+  color: inherit;
+  box-sizing: border-box;
+}
+.book.with-search .book-summary .book-search {
+  top: 0px;
+}
+.book.with-search .book-summary ul.summary {
+  top: 50px;
+}
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/style.css b/docs/bookdown_example/_book/libs/gitbook-2.6.7/css/style.css
new file mode 100644
index 0000000..edad73e
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baseReduce(collection,iteratee,accumulator,initFromCollection,eachFunc){eachFunc(collection,function(value,index,collection){accumulator=initFromCollection?(initFromCollection=false,value):iteratee(accumulator,value,index,collection)});return accumulator}var baseSetData=!metaMap?identity:function(func,data){metaMap.set(func,data);return func};function baseSlice(array,start,end){var index=-1,length=array.length;start=start==null?0:+start||0;if(start<0){start=-start>length?0:length+start}end=end===undefined||end>length?length:+end||0;if(end<0){end+=length}length=start>end?0:end-start>>>0;start>>>=0;var result=Array(length);while(++index<length){result[index]=array[index+start]}return result}function baseSome(collection,predicate){var result;baseEach(collection,function(value,index,collection){result=predicate(value,index,collection);return!result});return!!result}function baseSortBy(array,comparer){var length=array.length;array.sort(comparer);while(length--){array[length]=array[length].value}return array}function baseSortByOrder(collection,iteratees,orders){var callback=getCallback(),index=-1;iteratees=arrayMap(iteratees,function(iteratee){return callback(iteratee)});var result=baseMap(collection,function(value){var criteria=arrayMap(iteratees,function(iteratee){return iteratee(value)});return{criteria:criteria,index:++index,value:value}});return baseSortBy(result,function(object,other){return compareMultiple(object,other,orders)})}function baseSum(collection,iteratee){var result=0;baseEach(collection,function(value,index,collection){result+=+iteratee(value,index,collection)||0});return result}function baseUniq(array,iteratee){var index=-1,indexOf=getIndexOf(),length=array.length,isCommon=indexOf==baseIndexOf,isLarge=isCommon&&length>=LARGE_ARRAY_SIZE,seen=isLarge?createCache():null,result=[];if(seen){indexOf=cacheIndexOf;isCommon=false}else{isLarge=false;seen=iteratee?[]:result}outer:while(++index<length){var value=array[index],computed=iteratee?iteratee(value,index,array):value;if(isCommon&&value===value){var seenIndex=seen.length;while(seenIndex--){if(seen[seenIndex]===computed){continue outer}}if(iteratee){seen.push(computed)}result.push(value)}else if(indexOf(seen,computed,0)<0){if(iteratee||isLarge){seen.push(computed)}result.push(value)}}return result}function baseValues(object,props){var index=-1,length=props.length,result=Array(length);while(++index<length){result[index]=object[props[index]]}return result}function baseWhile(array,predicate,isDrop,fromRight){var length=array.length,index=fromRight?length:-1;while((fromRight?index--:++index<length)&&predicate(array[index],index,array)){}return isDrop?baseSlice(array,fromRight?0:index,fromRight?index+1:length):baseSlice(array,fromRight?index+1:0,fromRight?length:index)}function baseWrapperValue(value,actions){var result=value;if(result instanceof LazyWrapper){result=result.value()}var index=-1,length=actions.length;while(++index<length){var action=actions[index];result=action.func.apply(action.thisArg,arrayPush([result],action.args))}return result}function binaryIndex(array,value,retHighest){var low=0,high=array?array.length:low;if(typeof value=="number"&&value===value&&high<=HALF_MAX_ARRAY_LENGTH){while(low<high){var mid=low+high>>>1,computed=array[mid];if((retHighest?computed<=value:computed<value)&&computed!==null){low=mid+1}else{high=mid}}return high}return binaryIndexBy(array,value,identity,retHighest)}function binaryIndexBy(array,value,iteratee,retHighest){value=iteratee(value);var low=0,high=array?array.length:0,valIsNaN=value!==value,valIsNull=value===null,valIsUndef=value===undefined;while(low<high){var mid=nativeFloor((low+high)/2),computed=iteratee(array[mid]),isDef=computed!==undefined,isReflexive=computed===computed;if(valIsNaN){var setLow=isReflexive||retHighest}else if(valIsNull){setLow=isReflexive&&isDef&&(retHighest||computed!=null);
+}else if(valIsUndef){setLow=isReflexive&&(retHighest||isDef)}else if(computed==null){setLow=false}else{setLow=retHighest?computed<=value:computed<value}if(setLow){low=mid+1}else{high=mid}}return nativeMin(high,MAX_ARRAY_INDEX)}function bindCallback(func,thisArg,argCount){if(typeof func!="function"){return identity}if(thisArg===undefined){return func}switch(argCount){case 1:return function(value){return func.call(thisArg,value)};case 3:return function(value,index,collection){return func.call(thisArg,value,index,collection)};case 4:return function(accumulator,value,index,collection){return func.call(thisArg,accumulator,value,index,collection)};case 5:return function(value,other,key,object,source){return func.call(thisArg,value,other,key,object,source)}}return function(){return func.apply(thisArg,arguments)}}function bufferClone(buffer){var result=new ArrayBuffer(buffer.byteLength),view=new Uint8Array(result);view.set(new Uint8Array(buffer));return result}function composeArgs(args,partials,holders){var holdersLength=holders.length,argsIndex=-1,argsLength=nativeMax(args.length-holdersLength,0),leftIndex=-1,leftLength=partials.length,result=Array(leftLength+argsLength);while(++leftIndex<leftLength){result[leftIndex]=partials[leftIndex]}while(++argsIndex<holdersLength){result[holders[argsIndex]]=args[argsIndex]}while(argsLength--){result[leftIndex++]=args[argsIndex++]}return result}function composeArgsRight(args,partials,holders){var holdersIndex=-1,holdersLength=holders.length,argsIndex=-1,argsLength=nativeMax(args.length-holdersLength,0),rightIndex=-1,rightLength=partials.length,result=Array(argsLength+rightLength);while(++argsIndex<argsLength){result[argsIndex]=args[argsIndex]}var offset=argsIndex;while(++rightIndex<rightLength){result[offset+rightIndex]=partials[rightIndex]}while(++holdersIndex<holdersLength){result[offset+holders[holdersIndex]]=args[argsIndex++]}return result}function createAggregator(setter,initializer){return function(collection,iteratee,thisArg){var result=initializer?initializer():{};iteratee=getCallback(iteratee,thisArg,3);if(isArray(collection)){var index=-1,length=collection.length;while(++index<length){var value=collection[index];setter(result,value,iteratee(value,index,collection),collection)}}else{baseEach(collection,function(value,key,collection){setter(result,value,iteratee(value,key,collection),collection)})}return result}}function createAssigner(assigner){return restParam(function(object,sources){var index=-1,length=object==null?0:sources.length,customizer=length>2?sources[length-2]:undefined,guard=length>2?sources[2]:undefined,thisArg=length>1?sources[length-1]:undefined;if(typeof customizer=="function"){customizer=bindCallback(customizer,thisArg,5);length-=2}else{customizer=typeof thisArg=="function"?thisArg:undefined;length-=customizer?1:0}if(guard&&isIterateeCall(sources[0],sources[1],guard)){customizer=length<3?undefined:customizer;length=1}while(++index<length){var source=sources[index];if(source){assigner(object,source,customizer)}}return object})}function createBaseEach(eachFunc,fromRight){return function(collection,iteratee){var length=collection?getLength(collection):0;if(!isLength(length)){return eachFunc(collection,iteratee)}var index=fromRight?length:-1,iterable=toObject(collection);while(fromRight?index--:++index<length){if(iteratee(iterable[index],index,iterable)===false){break}}return collection}}function createBaseFor(fromRight){return function(object,iteratee,keysFunc){var iterable=toObject(object),props=keysFunc(object),length=props.length,index=fromRight?length:-1;while(fromRight?index--:++index<length){var key=props[index];if(iteratee(iterable[key],key,iterable)===false){break}}return object}}function createBindWrapper(func,thisArg){var Ctor=createCtorWrapper(func);function wrapper(){var fn=this&&this!==root&&this instanceof wrapper?Ctor:func;return fn.apply(thisArg,arguments)}return wrapper}function createCache(values){return nativeCreate&&Set?new SetCache(values):null}function createCompounder(callback){return function(string){var index=-1,array=words(deburr(string)),length=array.length,result="";while(++index<length){result=callback(result,array[index],index)}return result}}function createCtorWrapper(Ctor){return function(){var args=arguments;switch(args.length){case 0:return new Ctor;case 1:return new Ctor(args[0]);case 2:return new Ctor(args[0],args[1]);case 3:return new Ctor(args[0],args[1],args[2]);case 4:return new Ctor(args[0],args[1],args[2],args[3]);case 5:return new Ctor(args[0],args[1],args[2],args[3],args[4]);case 6:return new Ctor(args[0],args[1],args[2],args[3],args[4],args[5]);case 7:return new Ctor(args[0],args[1],args[2],args[3],args[4],args[5],args[6])}var thisBinding=baseCreate(Ctor.prototype),result=Ctor.apply(thisBinding,args);return isObject(result)?result:thisBinding}}function createCurry(flag){function curryFunc(func,arity,guard){if(guard&&isIterateeCall(func,arity,guard)){arity=undefined}var result=createWrapper(func,flag,undefined,undefined,undefined,undefined,undefined,arity);result.placeholder=curryFunc.placeholder;return result}return curryFunc}function createDefaults(assigner,customizer){return restParam(function(args){var object=args[0];if(object==null){return object}args.push(customizer);return assigner.apply(undefined,args)})}function createExtremum(comparator,exValue){return function(collection,iteratee,thisArg){if(thisArg&&isIterateeCall(collection,iteratee,thisArg)){iteratee=undefined}iteratee=getCallback(iteratee,thisArg,3);if(iteratee.length==1){collection=isArray(collection)?collection:toIterable(collection);var result=arrayExtremum(collection,iteratee,comparator,exValue);if(!(collection.length&&result===exValue)){return result}}return baseExtremum(collection,iteratee,comparator,exValue)}}function createFind(eachFunc,fromRight){return function(collection,predicate,thisArg){predicate=getCallback(predicate,thisArg,3);if(isArray(collection)){var index=baseFindIndex(collection,predicate,fromRight);return index>-1?collection[index]:undefined}return baseFind(collection,predicate,eachFunc)}}function createFindIndex(fromRight){return function(array,predicate,thisArg){if(!(array&&array.length)){return-1}predicate=getCallback(predicate,thisArg,3);return baseFindIndex(array,predicate,fromRight)}}function createFindKey(objectFunc){return function(object,predicate,thisArg){predicate=getCallback(predicate,thisArg,3);return baseFind(object,predicate,objectFunc,true)}}function createFlow(fromRight){return function(){var wrapper,length=arguments.length,index=fromRight?length:-1,leftIndex=0,funcs=Array(length);while(fromRight?index--:++index<length){var func=funcs[leftIndex++]=arguments[index];if(typeof func!="function"){throw new TypeError(FUNC_ERROR_TEXT)}if(!wrapper&&LodashWrapper.prototype.thru&&getFuncName(func)=="wrapper"){wrapper=new LodashWrapper([],true)}}index=wrapper?-1:length;while(++index<length){func=funcs[index];var funcName=getFuncName(func),data=funcName=="wrapper"?getData(func):undefined;if(data&&isLaziable(data[0])&&data[1]==(ARY_FLAG|CURRY_FLAG|PARTIAL_FLAG|REARG_FLAG)&&!data[4].length&&data[9]==1){wrapper=wrapper[getFuncName(data[0])].apply(wrapper,data[3])}else{wrapper=func.length==1&&isLaziable(func)?wrapper[funcName]():wrapper.thru(func)}}return function(){var args=arguments,value=args[0];if(wrapper&&args.length==1&&isArray(value)&&value.length>=LARGE_ARRAY_SIZE){return wrapper.plant(value).value()}var index=0,result=length?funcs[index].apply(this,args):value;while(++index<length){result=funcs[index].call(this,result)}return result}}}function createForEach(arrayFunc,eachFunc){return function(collection,iteratee,thisArg){return typeof iteratee=="function"&&thisArg===undefined&&isArray(collection)?arrayFunc(collection,iteratee):eachFunc(collection,bindCallback(iteratee,thisArg,3))}}function createForIn(objectFunc){return function(object,iteratee,thisArg){if(typeof iteratee!="function"||thisArg!==undefined){iteratee=bindCallback(iteratee,thisArg,3)}return objectFunc(object,iteratee,keysIn)}}function createForOwn(objectFunc){return function(object,iteratee,thisArg){if(typeof iteratee!="function"||thisArg!==undefined){iteratee=bindCallback(iteratee,thisArg,3)}return objectFunc(object,iteratee)}}function createObjectMapper(isMapKeys){return function(object,iteratee,thisArg){var result={};iteratee=getCallback(iteratee,thisArg,3);baseForOwn(object,function(value,key,object){var mapped=iteratee(value,key,object);key=isMapKeys?mapped:key;value=isMapKeys?value:mapped;result[key]=value});return result}}function createPadDir(fromRight){return function(string,length,chars){string=baseToString(string);return(fromRight?string:"")+createPadding(string,length,chars)+(fromRight?"":string)}}function createPartial(flag){var partialFunc=restParam(function(func,partials){var holders=replaceHolders(partials,partialFunc.placeholder);return createWrapper(func,flag,undefined,partials,holders)});return partialFunc}function createReduce(arrayFunc,eachFunc){return function(collection,iteratee,accumulator,thisArg){var initFromArray=arguments.length<3;return typeof iteratee=="function"&&thisArg===undefined&&isArray(collection)?arrayFunc(collection,iteratee,accumulator,initFromArray):baseReduce(collection,getCallback(iteratee,thisArg,4),accumulator,initFromArray,eachFunc)}}function createHybridWrapper(func,bitmask,thisArg,partials,holders,partialsRight,holdersRight,argPos,ary,arity){var isAry=bitmask&ARY_FLAG,isBind=bitmask&BIND_FLAG,isBindKey=bitmask&BIND_KEY_FLAG,isCurry=bitmask&CURRY_FLAG,isCurryBound=bitmask&CURRY_BOUND_FLAG,isCurryRight=bitmask&CURRY_RIGHT_FLAG,Ctor=isBindKey?undefined:createCtorWrapper(func);function wrapper(){var length=arguments.length,index=length,args=Array(length);while(index--){args[index]=arguments[index]}if(partials){args=composeArgs(args,partials,holders)}if(partialsRight){args=composeArgsRight(args,partialsRight,holdersRight)}if(isCurry||isCurryRight){var placeholder=wrapper.placeholder,argsHolders=replaceHolders(args,placeholder);length-=argsHolders.length;if(length<arity){var newArgPos=argPos?arrayCopy(argPos):undefined,newArity=nativeMax(arity-length,0),newsHolders=isCurry?argsHolders:undefined,newHoldersRight=isCurry?undefined:argsHolders,newPartials=isCurry?args:undefined,newPartialsRight=isCurry?undefined:args;bitmask|=isCurry?PARTIAL_FLAG:PARTIAL_RIGHT_FLAG;bitmask&=~(isCurry?PARTIAL_RIGHT_FLAG:PARTIAL_FLAG);if(!isCurryBound){bitmask&=~(BIND_FLAG|BIND_KEY_FLAG)}var newData=[func,bitmask,thisArg,newPartials,newsHolders,newPartialsRight,newHoldersRight,newArgPos,ary,newArity],result=createHybridWrapper.apply(undefined,newData);if(isLaziable(func)){setData(result,newData)}result.placeholder=placeholder;return result}}var thisBinding=isBind?thisArg:this,fn=isBindKey?thisBinding[func]:func;if(argPos){args=reorder(args,argPos)}if(isAry&&ary<args.length){args.length=ary}if(this&&this!==root&&this instanceof wrapper){fn=Ctor||createCtorWrapper(func)}return fn.apply(thisBinding,args)}return wrapper}function createPadding(string,length,chars){var strLength=string.length;length=+length;if(strLength>=length||!nativeIsFinite(length)){return""}var padLength=length-strLength;chars=chars==null?" ":chars+"";return repeat(chars,nativeCeil(padLength/chars.length)).slice(0,padLength)}function createPartialWrapper(func,bitmask,thisArg,partials){var isBind=bitmask&BIND_FLAG,Ctor=createCtorWrapper(func);function wrapper(){var argsIndex=-1,argsLength=arguments.length,leftIndex=-1,leftLength=partials.length,args=Array(leftLength+argsLength);while(++leftIndex<leftLength){args[leftIndex]=partials[leftIndex]}while(argsLength--){args[leftIndex++]=arguments[++argsIndex]}var fn=this&&this!==root&&this instanceof wrapper?Ctor:func;return fn.apply(isBind?thisArg:this,args)}return wrapper}function createRound(methodName){var func=Math[methodName];return function(number,precision){precision=precision===undefined?0:+precision||0;if(precision){precision=pow(10,precision);return func(number*precision)/precision}return func(number)}}function createSortedIndex(retHighest){return function(array,value,iteratee,thisArg){var callback=getCallback(iteratee);return iteratee==null&&callback===baseCallback?binaryIndex(array,value,retHighest):binaryIndexBy(array,value,callback(iteratee,thisArg,1),retHighest)}}function createWrapper(func,bitmask,thisArg,partials,holders,argPos,ary,arity){var isBindKey=bitmask&BIND_KEY_FLAG;if(!isBindKey&&typeof func!="function"){throw new TypeError(FUNC_ERROR_TEXT)}var length=partials?partials.length:0;if(!length){bitmask&=~(PARTIAL_FLAG|PARTIAL_RIGHT_FLAG);partials=holders=undefined}length-=holders?holders.length:0;if(bitmask&PARTIAL_RIGHT_FLAG){var partialsRight=partials,holdersRight=holders;partials=holders=undefined}var data=isBindKey?undefined:getData(func),newData=[func,bitmask,thisArg,partials,holders,partialsRight,holdersRight,argPos,ary,arity];if(data){mergeData(newData,data);bitmask=newData[1];arity=newData[9]}newData[9]=arity==null?isBindKey?0:func.length:nativeMax(arity-length,0)||0;if(bitmask==BIND_FLAG){var result=createBindWrapper(newData[0],newData[2])}else if((bitmask==PARTIAL_FLAG||bitmask==(BIND_FLAG|PARTIAL_FLAG))&&!newData[4].length){result=createPartialWrapper.apply(undefined,newData)}else{result=createHybridWrapper.apply(undefined,newData)}var setter=data?baseSetData:setData;return setter(result,newData)}function equalArrays(array,other,equalFunc,customizer,isLoose,stackA,stackB){var index=-1,arrLength=array.length,othLength=other.length;if(arrLength!=othLength&&!(isLoose&&othLength>arrLength)){return false}while(++index<arrLength){var arrValue=array[index],othValue=other[index],result=customizer?customizer(isLoose?othValue:arrValue,isLoose?arrValue:othValue,index):undefined;if(result!==undefined){if(result){continue}return false}if(isLoose){if(!arraySome(other,function(othValue){return arrValue===othValue||equalFunc(arrValue,othValue,customizer,isLoose,stackA,stackB)})){return false}}else if(!(arrValue===othValue||equalFunc(arrValue,othValue,customizer,isLoose,stackA,stackB))){return false}}return true}function equalByTag(object,other,tag){switch(tag){case boolTag:case dateTag:return+object==+other;case errorTag:return object.name==other.name&&object.message==other.message;case numberTag:return object!=+object?other!=+other:object==+other;case regexpTag:case stringTag:return object==other+""}return false}function equalObjects(object,other,equalFunc,customizer,isLoose,stackA,stackB){var objProps=keys(object),objLength=objProps.length,othProps=keys(other),othLength=othProps.length;if(objLength!=othLength&&!isLoose){return false}var index=objLength;while(index--){var key=objProps[index];if(!(isLoose?key in other:hasOwnProperty.call(other,key))){return false}}var skipCtor=isLoose;while(++index<objLength){key=objProps[index];var objValue=object[key],othValue=other[key],result=customizer?customizer(isLoose?othValue:objValue,isLoose?objValue:othValue,key):undefined;if(!(result===undefined?equalFunc(objValue,othValue,customizer,isLoose,stackA,stackB):result)){return false}skipCtor||(skipCtor=key=="constructor")}if(!skipCtor){var objCtor=object.constructor,othCtor=other.constructor;if(objCtor!=othCtor&&("constructor"in object&&"constructor"in other)&&!(typeof objCtor=="function"&&objCtor instanceof objCtor&&typeof othCtor=="function"&&othCtor instanceof othCtor)){return false}}return true}function getCallback(func,thisArg,argCount){var result=lodash.callback||callback;result=result===callback?baseCallback:result;return argCount?result(func,thisArg,argCount):result}var getData=!metaMap?noop:function(func){return metaMap.get(func)};function getFuncName(func){var result=func.name,array=realNames[result],length=array?array.length:0;while(length--){var data=array[length],otherFunc=data.func;if(otherFunc==null||otherFunc==func){return data.name}}return result}function getIndexOf(collection,target,fromIndex){var result=lodash.indexOf||indexOf;result=result===indexOf?baseIndexOf:result;return collection?result(collection,target,fromIndex):result}var getLength=baseProperty("length");function getMatchData(object){var result=pairs(object),length=result.length;while(length--){result[length][2]=isStrictComparable(result[length][1])}return result}function getNative(object,key){var value=object==null?undefined:object[key];return isNative(value)?value:undefined}function getView(start,end,transforms){var index=-1,length=transforms.length;while(++index<length){var data=transforms[index],size=data.size;switch(data.type){case"drop":start+=size;break;case"dropRight":end-=size;break;case"take":end=nativeMin(end,start+size);break;case"takeRight":start=nativeMax(start,end-size);break}}return{start:start,end:end}}function initCloneArray(array){var length=array.length,result=new array.constructor(length);if(length&&typeof array[0]=="string"&&hasOwnProperty.call(array,"index")){result.index=array.index;result.input=array.input}return result}function initCloneObject(object){var Ctor=object.constructor;if(!(typeof Ctor=="function"&&Ctor instanceof Ctor)){Ctor=Object}return new Ctor}function initCloneByTag(object,tag,isDeep){var Ctor=object.constructor;switch(tag){case arrayBufferTag:return bufferClone(object);case boolTag:case dateTag:return new Ctor(+object);case float32Tag:case float64Tag:case int8Tag:case int16Tag:case int32Tag:case uint8Tag:case uint8ClampedTag:case uint16Tag:case uint32Tag:var buffer=object.buffer;return new Ctor(isDeep?bufferClone(buffer):buffer,object.byteOffset,object.length);case numberTag:case stringTag:return new Ctor(object);case regexpTag:var result=new Ctor(object.source,reFlags.exec(object));result.lastIndex=object.lastIndex}return result}function invokePath(object,path,args){if(object!=null&&!isKey(path,object)){path=toPath(path);object=path.length==1?object:baseGet(object,baseSlice(path,0,-1));path=last(path)}var func=object==null?object:object[path];return func==null?undefined:func.apply(object,args)}function isArrayLike(value){return value!=null&&isLength(getLength(value))}function isIndex(value,length){value=typeof value=="number"||reIsUint.test(value)?+value:-1;length=length==null?MAX_SAFE_INTEGER:length;return value>-1&&value%1==0&&value<length}function isIterateeCall(value,index,object){if(!isObject(object)){return false}var type=typeof index;if(type=="number"?isArrayLike(object)&&isIndex(index,object.length):type=="string"&&index in object){var other=object[index];return value===value?value===other:other!==other}return false}function isKey(value,object){var type=typeof value;if(type=="string"&&reIsPlainProp.test(value)||type=="number"){return true}if(isArray(value)){return false}var result=!reIsDeepProp.test(value);return result||object!=null&&value in toObject(object)}function isLaziable(func){var funcName=getFuncName(func);if(!(funcName in LazyWrapper.prototype)){return false}var other=lodash[funcName];if(func===other){return true}var data=getData(other);return!!data&&func===data[0]}function isLength(value){return typeof value=="number"&&value>-1&&value%1==0&&value<=MAX_SAFE_INTEGER}function isStrictComparable(value){return value===value&&!isObject(value)}function mergeData(data,source){var bitmask=data[1],srcBitmask=source[1],newBitmask=bitmask|srcBitmask,isCommon=newBitmask<ARY_FLAG;var isCombo=srcBitmask==ARY_FLAG&&bitmask==CURRY_FLAG||srcBitmask==ARY_FLAG&&bitmask==REARG_FLAG&&data[7].length<=source[8]||srcBitmask==(ARY_FLAG|REARG_FLAG)&&bitmask==CURRY_FLAG;if(!(isCommon||isCombo)){return data}if(srcBitmask&BIND_FLAG){data[2]=source[2];newBitmask|=bitmask&BIND_FLAG?0:CURRY_BOUND_FLAG}var value=source[3];if(value){var 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result={};baseForIn(object,function(value,key,object){if(predicate(value,key,object)){result[key]=value}});return result}function reorder(array,indexes){var arrLength=array.length,length=nativeMin(indexes.length,arrLength),oldArray=arrayCopy(array);while(length--){var index=indexes[length];array[length]=isIndex(index,arrLength)?oldArray[index]:undefined}return array}var setData=function(){var count=0,lastCalled=0;return function(key,value){var stamp=now(),remaining=HOT_SPAN-(stamp-lastCalled);lastCalled=stamp;if(remaining>0){if(++count>=HOT_COUNT){return key}}else{count=0}return baseSetData(key,value)}}();function shimKeys(object){var props=keysIn(object),propsLength=props.length,length=propsLength&&object.length;var allowIndexes=!!length&&isLength(length)&&(isArray(object)||isArguments(object));var index=-1,result=[];while(++index<propsLength){var key=props[index];if(allowIndexes&&isIndex(key,length)||hasOwnProperty.call(object,key)){result.push(key)}}return result}function 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result=Array(length);while(++index<length){result[index]=arrayMap(array,baseProperty(index))}return result}function unzipWith(array,iteratee,thisArg){var length=array?array.length:0;if(!length){return[]}var result=unzip(array);if(iteratee==null){return result}iteratee=bindCallback(iteratee,thisArg,4);return arrayMap(result,function(group){return arrayReduce(group,iteratee,undefined,true)})}var without=restParam(function(array,values){return isArrayLike(array)?baseDifference(array,values):[]});function xor(){var index=-1,length=arguments.length;while(++index<length){var array=arguments[index];if(isArrayLike(array)){var result=result?arrayPush(baseDifference(result,array),baseDifference(array,result)):array}}return result?baseUniq(result):[]}var zip=restParam(unzip);function zipObject(props,values){var index=-1,length=props?props.length:0,result={};if(length&&!values&&!isArray(props[0])){values=[]}while(++index<length){var key=props[index];if(values){result[key]=values[index]}else 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result,parent=this;while(parent instanceof baseLodash){var clone=wrapperClone(parent);if(result){previous.__wrapped__=clone}else{result=clone}var previous=clone;parent=parent.__wrapped__}previous.__wrapped__=value;return result}function wrapperReverse(){var value=this.__wrapped__;var interceptor=function(value){return wrapped&&wrapped.__dir__<0?value:value.reverse()};if(value instanceof LazyWrapper){var wrapped=value;if(this.__actions__.length){wrapped=new LazyWrapper(this)}wrapped=wrapped.reverse();wrapped.__actions__.push({func:thru,args:[interceptor],thisArg:undefined});return new LodashWrapper(wrapped,this.__chain__)}return this.thru(interceptor)}function wrapperToString(){return this.value()+""}function wrapperValue(){return baseWrapperValue(this.__wrapped__,this.__actions__)}var at=restParam(function(collection,props){return baseAt(collection,baseFlatten(props))});var countBy=createAggregator(function(result,value,key){hasOwnProperty.call(result,key)?++result[key]:result[key]=1});function every(collection,predicate,thisArg){var func=isArray(collection)?arrayEvery:baseEvery;if(thisArg&&isIterateeCall(collection,predicate,thisArg)){predicate=undefined}if(typeof predicate!="function"||thisArg!==undefined){predicate=getCallback(predicate,thisArg,3)}return func(collection,predicate)}function filter(collection,predicate,thisArg){var func=isArray(collection)?arrayFilter:baseFilter;predicate=getCallback(predicate,thisArg,3);return func(collection,predicate)}var find=createFind(baseEach);var findLast=createFind(baseEachRight,true);function findWhere(collection,source){return find(collection,baseMatches(source))}var forEach=createForEach(arrayEach,baseEach);var forEachRight=createForEach(arrayEachRight,baseEachRight);
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func=isFunc?path:isProp&&value!=null?value[path]:undefined;result[++index]=func?func.apply(value,args):invokePath(value,path,args)});return result});function map(collection,iteratee,thisArg){var func=isArray(collection)?arrayMap:baseMap;iteratee=getCallback(iteratee,thisArg,3);return func(collection,iteratee)}var partition=createAggregator(function(result,value,key){result[key?0:1].push(value)},function(){return[[],[]]});function pluck(collection,path){return map(collection,property(path))}var reduce=createReduce(arrayReduce,baseEach);var reduceRight=createReduce(arrayReduceRight,baseEachRight);function reject(collection,predicate,thisArg){var func=isArray(collection)?arrayFilter:baseFilter;predicate=getCallback(predicate,thisArg,3);return func(collection,function(value,index,collection){return!predicate(value,index,collection)})}function sample(collection,n,guard){if(guard?isIterateeCall(collection,n,guard):n==null){collection=toIterable(collection);var length=collection.length;return length>0?collection[baseRandom(0,length-1)]:undefined}var index=-1,result=toArray(collection),length=result.length,lastIndex=length-1;n=nativeMin(n<0?0:+n||0,length);while(++index<n){var rand=baseRandom(index,lastIndex),value=result[rand];result[rand]=result[index];result[index]=value}result.length=n;return result}function shuffle(collection){return sample(collection,POSITIVE_INFINITY)}function size(collection){var length=collection?getLength(collection):0;return isLength(length)?length:keys(collection).length}function some(collection,predicate,thisArg){var func=isArray(collection)?arraySome:baseSome;if(thisArg&&isIterateeCall(collection,predicate,thisArg)){predicate=undefined}if(typeof predicate!="function"||thisArg!==undefined){predicate=getCallback(predicate,thisArg,3)}return func(collection,predicate)}function sortBy(collection,iteratee,thisArg){if(collection==null){return[]}if(thisArg&&isIterateeCall(collection,iteratee,thisArg)){iteratee=undefined}var index=-1;iteratee=getCallback(iteratee,thisArg,3);var result=baseMap(collection,function(value,key,collection){return{criteria:iteratee(value,key,collection),index:++index,value:value}});return baseSortBy(result,compareAscending)}var sortByAll=restParam(function(collection,iteratees){if(collection==null){return[]}var guard=iteratees[2];if(guard&&isIterateeCall(iteratees[0],iteratees[1],guard)){iteratees.length=1}return baseSortByOrder(collection,baseFlatten(iteratees),[])});function sortByOrder(collection,iteratees,orders,guard){if(collection==null){return[]}if(guard&&isIterateeCall(iteratees,orders,guard)){orders=undefined}if(!isArray(iteratees)){iteratees=iteratees==null?[]:[iteratees]}if(!isArray(orders)){orders=orders==null?[]:[orders]}return baseSortByOrder(collection,iteratees,orders)}function where(collection,source){return filter(collection,baseMatches(source))}var now=nativeNow||function(){return(new Date).getTime()};function after(n,func){if(typeof func!="function"){if(typeof n=="function"){var temp=n;n=func;func=temp}else{throw new TypeError(FUNC_ERROR_TEXT)}}n=nativeIsFinite(n=+n)?n:0;return function(){if(--n<1){return func.apply(this,arguments)}}}function ary(func,n,guard){if(guard&&isIterateeCall(func,n,guard)){n=undefined}n=func&&n==null?func.length:nativeMax(+n||0,0);return createWrapper(func,ARY_FLAG,undefined,undefined,undefined,undefined,n)}function before(n,func){var result;if(typeof func!="function"){if(typeof n=="function"){var temp=n;n=func;func=temp}else{throw new TypeError(FUNC_ERROR_TEXT)}}return function(){if(--n>0){result=func.apply(this,arguments)}if(n<=1){func=undefined}return result}}var bind=restParam(function(func,thisArg,partials){var bitmask=BIND_FLAG;if(partials.length){var holders=replaceHolders(partials,bind.placeholder);bitmask|=PARTIAL_FLAG}return createWrapper(func,bitmask,thisArg,partials,holders)});var bindAll=restParam(function(object,methodNames){methodNames=methodNames.length?baseFlatten(methodNames):functions(object);var 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cancel(){if(timeoutId){clearTimeout(timeoutId)}if(maxTimeoutId){clearTimeout(maxTimeoutId)}lastCalled=0;maxTimeoutId=timeoutId=trailingCall=undefined}function complete(isCalled,id){if(id){clearTimeout(id)}maxTimeoutId=timeoutId=trailingCall=undefined;if(isCalled){lastCalled=now();result=func.apply(thisArg,args);if(!timeoutId&&!maxTimeoutId){args=thisArg=undefined}}}function delayed(){var remaining=wait-(now()-stamp);if(remaining<=0||remaining>wait){complete(trailingCall,maxTimeoutId)}else{timeoutId=setTimeout(delayed,remaining)}}function maxDelayed(){complete(trailing,timeoutId)}function debounced(){args=arguments;stamp=now();thisArg=this;trailingCall=trailing&&(timeoutId||!leading);if(maxWait===false){var leadingCall=leading&&!timeoutId}else{if(!maxTimeoutId&&!leading){lastCalled=stamp}var remaining=maxWait-(stamp-lastCalled),isCalled=remaining<=0||remaining>maxWait;if(isCalled){if(maxTimeoutId){maxTimeoutId=clearTimeout(maxTimeoutId)}lastCalled=stamp;result=func.apply(thisArg,args)}else if(!maxTimeoutId){maxTimeoutId=setTimeout(maxDelayed,remaining)}}if(isCalled&&timeoutId){timeoutId=clearTimeout(timeoutId)}else if(!timeoutId&&wait!==maxWait){timeoutId=setTimeout(delayed,wait)}if(leadingCall){isCalled=true;result=func.apply(thisArg,args)}if(isCalled&&!timeoutId&&!maxTimeoutId){args=thisArg=undefined}return result}debounced.cancel=cancel;return debounced}var defer=restParam(function(func,args){return baseDelay(func,1,args)});var delay=restParam(function(func,wait,args){return baseDelay(func,wait,args)});var flow=createFlow();var flowRight=createFlow(true);function memoize(func,resolver){if(typeof func!="function"||resolver&&typeof resolver!="function"){throw new TypeError(FUNC_ERROR_TEXT)}var memoized=function(){var 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checkIteratee=/^(?:filter|map|reject)|While$/.test(methodName),retUnwrapped=/^(?:first|last)$/.test(methodName),lodashFunc=lodash[retUnwrapped?"take"+(methodName=="last"?"Right":""):methodName];if(!lodashFunc){return}lodash.prototype[methodName]=function(){var args=retUnwrapped?[1]:arguments,chainAll=this.__chain__,value=this.__wrapped__,isHybrid=!!this.__actions__.length,isLazy=value instanceof LazyWrapper,iteratee=args[0],useLazy=isLazy||isArray(value);if(useLazy&&checkIteratee&&typeof iteratee=="function"&&iteratee.length!=1){isLazy=useLazy=false}var interceptor=function(value){return retUnwrapped&&chainAll?lodashFunc(value,1)[0]:lodashFunc.apply(undefined,arrayPush([value],args))};var action={func:thru,args:[interceptor],thisArg:undefined},onlyLazy=isLazy&&!isHybrid;if(retUnwrapped&&!chainAll){if(onlyLazy){value=value.clone();value.__actions__.push(action);return func.call(value)}return lodashFunc.call(undefined,this.value())[0]}if(!retUnwrapped&&useLazy){value=onlyLazy?value:new LazyWrapper(this);var result=func.apply(value,args);result.__actions__.push(action);return new LodashWrapper(result,chainAll)}return this.thru(interceptor)}});arrayEach(["join","pop","push","replace","shift","sort","splice","split","unshift"],function(methodName){var func=(/^(?:replace|split)$/.test(methodName)?stringProto:arrayProto)[methodName],chainName=/^(?:push|sort|unshift)$/.test(methodName)?"tap":"thru",retUnwrapped=/^(?:join|pop|replace|shift)$/.test(methodName);lodash.prototype[methodName]=function(){var args=arguments;if(retUnwrapped&&!this.__chain__){return func.apply(this.value(),args)}return this[chainName](function(value){return func.apply(value,args)})}});baseForOwn(LazyWrapper.prototype,function(func,methodName){var lodashFunc=lodash[methodName];if(lodashFunc){var key=lodashFunc.name,names=realNames[key]||(realNames[key]=[]);names.push({name:methodName,func:lodashFunc})}});realNames[createHybridWrapper(undefined,BIND_KEY_FLAG).name]=[{name:"wrapper",func:undefined}];LazyWrapper.prototype.clone=lazyClone;LazyWrapper.prototype.reverse=lazyReverse;LazyWrapper.prototype.value=lazyValue;lodash.prototype.chain=wrapperChain;lodash.prototype.commit=wrapperCommit;lodash.prototype.concat=wrapperConcat;lodash.prototype.plant=wrapperPlant;lodash.prototype.reverse=wrapperReverse;lodash.prototype.toString=wrapperToString;lodash.prototype.run=lodash.prototype.toJSON=lodash.prototype.valueOf=lodash.prototype.value=wrapperValue;lodash.prototype.collect=lodash.prototype.map;lodash.prototype.head=lodash.prototype.first;lodash.prototype.select=lodash.prototype.filter;lodash.prototype.tail=lodash.prototype.rest;return lodash}var _=runInContext();if(typeof define=="function"&&typeof define.amd=="object"&&define.amd){root._=_;define(function(){return _})}else if(freeExports&&freeModule){if(moduleExports){(freeModule.exports=_)._=_}else{freeExports._=_}}else{root._=_}}).call(this)}).call(this,typeof global!=="undefined"?global:typeof self!=="undefined"?self:typeof window!=="undefined"?window:{})},{}],3:[function(require,module,exports){(function(window,document,undefined){var _MAP={8:"backspace",9:"tab",13:"enter",16:"shift",17:"ctrl",18:"alt",20:"capslock",27:"esc",32:"space",33:"pageup",34:"pagedown",35:"end",36:"home",37:"left",38:"up",39:"right",40:"down",45:"ins",46:"del",91:"meta",93:"meta",224:"meta"};var _KEYCODE_MAP={106:"*",107:"+",109:"-",110:".",111:"/",186:";",187:"=",188:",",189:"-",190:".",191:"/",192:"`",219:"[",220:"\\",221:"]",222:"'"};var _SHIFT_MAP={"~":"`","!":"1","@":"2","#":"3",$:"4","%":"5","^":"6","&":"7","*":"8","(":"9",")":"0",_:"-","+":"=",":":";",'"':"'","<":",",">":".","?":"/","|":"\\"};var _SPECIAL_ALIASES={option:"alt",command:"meta","return":"enter",escape:"esc",plus:"+",mod:/Mac|iPod|iPhone|iPad/.test(navigator.platform)?"meta":"ctrl"};var _REVERSE_MAP;for(var i=1;i<20;++i){_MAP[111+i]="f"+i}for(i=0;i<=9;++i){_MAP[i+96]=i}function _addEvent(object,type,callback){if(object.addEventListener){object.addEventListener(type,callback,false);return}object.attachEvent("on"+type,callback)}function _characterFromEvent(e){if(e.type=="keypress"){var character=String.fromCharCode(e.which);if(!e.shiftKey){character=character.toLowerCase()}return character}if(_MAP[e.which]){return _MAP[e.which]}if(_KEYCODE_MAP[e.which]){return _KEYCODE_MAP[e.which]}return String.fromCharCode(e.which).toLowerCase()}function _modifiersMatch(modifiers1,modifiers2){return modifiers1.sort().join(",")===modifiers2.sort().join(",")}function _eventModifiers(e){var modifiers=[];if(e.shiftKey){modifiers.push("shift")}if(e.altKey){modifiers.push("alt")}if(e.ctrlKey){modifiers.push("ctrl")}if(e.metaKey){modifiers.push("meta")}return modifiers}function _preventDefault(e){if(e.preventDefault){e.preventDefault();return}e.returnValue=false}function _stopPropagation(e){if(e.stopPropagation){e.stopPropagation();return}e.cancelBubble=true}function _isModifier(key){return key=="shift"||key=="ctrl"||key=="alt"||key=="meta"}function _getReverseMap(){if(!_REVERSE_MAP){_REVERSE_MAP={};for(var key in _MAP){if(key>95&&key<112){continue}if(_MAP.hasOwnProperty(key)){_REVERSE_MAP[_MAP[key]]=key}}}return _REVERSE_MAP}function _pickBestAction(key,modifiers,action){if(!action){action=_getReverseMap()[key]?"keydown":"keypress"}if(action=="keypress"&&modifiers.length){action="keydown"}return action}function _keysFromString(combination){if(combination==="+"){return["+"]}combination=combination.replace(/\+{2}/g,"+plus");return combination.split("+")}function _getKeyInfo(combination,action){var keys;var key;var i;var modifiers=[];keys=_keysFromString(combination);for(i=0;i<keys.length;++i){key=keys[i];if(_SPECIAL_ALIASES[key]){key=_SPECIAL_ALIASES[key]}if(action&&action!="keypress"&&_SHIFT_MAP[key]){key=_SHIFT_MAP[key];modifiers.push("shift")}if(_isModifier(key)){modifiers.push(key)}}action=_pickBestAction(key,modifiers,action);return{key:key,modifiers:modifiers,action:action}}function _belongsTo(element,ancestor){if(element===null||element===document){return false}if(element===ancestor){return true}return _belongsTo(element.parentNode,ancestor)}function Mousetrap(targetElement){var self=this;targetElement=targetElement||document;if(!(self instanceof Mousetrap)){return new Mousetrap(targetElement)}self.target=targetElement;self._callbacks={};self._directMap={};var _sequenceLevels={};var _resetTimer;var _ignoreNextKeyup=false;var _ignoreNextKeypress=false;var _nextExpectedAction=false;function _resetSequences(doNotReset){doNotReset=doNotReset||{};var activeSequences=false,key;for(key in _sequenceLevels){if(doNotReset[key]){activeSequences=true;continue}_sequenceLevels[key]=0}if(!activeSequences){_nextExpectedAction=false}}function _getMatches(character,modifiers,e,sequenceName,combination,level){var i;var callback;var matches=[];var action=e.type;if(!self._callbacks[character]){return[]}if(action=="keyup"&&_isModifier(character)){modifiers=[character]}for(i=0;i<self._callbacks[character].length;++i){callback=self._callbacks[character][i];if(!sequenceName&&callback.seq&&_sequenceLevels[callback.seq]!=callback.level){continue}if(action!=callback.action){continue}if(action=="keypress"&&!e.metaKey&&!e.ctrlKey||_modifiersMatch(modifiers,callback.modifiers)){var deleteCombo=!sequenceName&&callback.combo==combination;var deleteSequence=sequenceName&&callback.seq==sequenceName&&callback.level==level;if(deleteCombo||deleteSequence){self._callbacks[character].splice(i,1)}matches.push(callback)}}return matches}function _fireCallback(callback,e,combo,sequence){if(self.stopCallback(e,e.target||e.srcElement,combo,sequence)){return}if(callback(e,combo)===false){_preventDefault(e);_stopPropagation(e)}}self._handleKey=function(character,modifiers,e){var callbacks=_getMatches(character,modifiers,e);var i;var doNotReset={};var maxLevel=0;var processedSequenceCallback=false;for(i=0;i<callbacks.length;++i){if(callbacks[i].seq){maxLevel=Math.max(maxLevel,callbacks[i].level)}}for(i=0;i<callbacks.length;++i){if(callbacks[i].seq){if(callbacks[i].level!=maxLevel){continue}processedSequenceCallback=true;doNotReset[callbacks[i].seq]=1;_fireCallback(callbacks[i].callback,e,callbacks[i].combo,callbacks[i].seq);continue}if(!processedSequenceCallback){_fireCallback(callbacks[i].callback,e,callbacks[i].combo)}}var ignoreThisKeypress=e.type=="keypress"&&_ignoreNextKeypress;if(e.type==_nextExpectedAction&&!_isModifier(character)&&!ignoreThisKeypress){_resetSequences(doNotReset)}_ignoreNextKeypress=processedSequenceCallback&&e.type=="keydown"};function _handleKeyEvent(e){if(typeof e.which!=="number"){e.which=e.keyCode}var character=_characterFromEvent(e);if(!character){return}if(e.type=="keyup"&&_ignoreNextKeyup===character){_ignoreNextKeyup=false;return}self.handleKey(character,_eventModifiers(e),e)}function _resetSequenceTimer(){clearTimeout(_resetTimer);_resetTimer=setTimeout(_resetSequences,1e3)}function _bindSequence(combo,keys,callback,action){_sequenceLevels[combo]=0;function _increaseSequence(nextAction){return function(){_nextExpectedAction=nextAction;++_sequenceLevels[combo];_resetSequenceTimer()}}function _callbackAndReset(e){_fireCallback(callback,e,combo);if(action!=="keyup"){_ignoreNextKeyup=_characterFromEvent(e)}setTimeout(_resetSequences,10)}for(var i=0;i<keys.length;++i){var isFinal=i+1===keys.length;var wrappedCallback=isFinal?_callbackAndReset:_increaseSequence(action||_getKeyInfo(keys[i+1]).action);_bindSingle(keys[i],wrappedCallback,action,combo,i)}}function _bindSingle(combination,callback,action,sequenceName,level){self._directMap[combination+":"+action]=callback;combination=combination.replace(/\s+/g," ");var sequence=combination.split(" ");var info;if(sequence.length>1){_bindSequence(combination,sequence,callback,action);return}info=_getKeyInfo(combination,action);self._callbacks[info.key]=self._callbacks[info.key]||[];_getMatches(info.key,info.modifiers,{type:info.action},sequenceName,combination,level);self._callbacks[info.key][sequenceName?"unshift":"push"]({callback:callback,modifiers:info.modifiers,action:info.action,seq:sequenceName,level:level,combo:combination})}self._bindMultiple=function(combinations,callback,action){for(var i=0;i<combinations.length;++i){_bindSingle(combinations[i],callback,action)}};_addEvent(targetElement,"keypress",_handleKeyEvent);_addEvent(targetElement,"keydown",_handleKeyEvent);_addEvent(targetElement,"keyup",_handleKeyEvent)}Mousetrap.prototype.bind=function(keys,callback,action){var self=this;keys=keys instanceof Array?keys:[keys];self._bindMultiple.call(self,keys,callback,action);return self};Mousetrap.prototype.unbind=function(keys,action){var self=this;return self.bind.call(self,keys,function(){},action)};Mousetrap.prototype.trigger=function(keys,action){var self=this;if(self._directMap[keys+":"+action]){self._directMap[keys+":"+action]({},keys)}return self};Mousetrap.prototype.reset=function(){var self=this;self._callbacks={};self._directMap={};return self};Mousetrap.prototype.stopCallback=function(e,element){var self=this;if((" "+element.className+" ").indexOf(" mousetrap ")>-1){return false}if(_belongsTo(element,self.target)){return false}return element.tagName=="INPUT"||element.tagName=="SELECT"||element.tagName=="TEXTAREA"||element.isContentEditable};Mousetrap.prototype.handleKey=function(){var self=this;return self._handleKey.apply(self,arguments)};Mousetrap.init=function(){var documentMousetrap=Mousetrap(document);for(var method in documentMousetrap){if(method.charAt(0)!=="_"){Mousetrap[method]=function(method){return function(){return documentMousetrap[method].apply(documentMousetrap,arguments)}}(method)}}};Mousetrap.init();window.Mousetrap=Mousetrap;if(typeof module!=="undefined"&&module.exports){module.exports=Mousetrap}if(typeof define==="function"&&define.amd){define(function(){return Mousetrap})}})(window,document)},{}],4:[function(require,module,exports){(function(process){function normalizeArray(parts,allowAboveRoot){var up=0;for(var i=parts.length-1;i>=0;i--){var last=parts[i];if(last==="."){parts.splice(i,1)}else if(last===".."){parts.splice(i,1);up++}else if(up){parts.splice(i,1);up--}}if(allowAboveRoot){for(;up--;up){parts.unshift("..")}}return parts}var splitPathRe=/^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;var splitPath=function(filename){return splitPathRe.exec(filename).slice(1)};exports.resolve=function(){var resolvedPath="",resolvedAbsolute=false;for(var i=arguments.length-1;i>=-1&&!resolvedAbsolute;i--){var path=i>=0?arguments[i]:process.cwd();if(typeof path!=="string"){throw new TypeError("Arguments to path.resolve must be strings")}else if(!path){continue}resolvedPath=path+"/"+resolvedPath;resolvedAbsolute=path.charAt(0)==="/"}resolvedPath=normalizeArray(filter(resolvedPath.split("/"),function(p){return!!p}),!resolvedAbsolute).join("/");return(resolvedAbsolute?"/":"")+resolvedPath||"."};exports.normalize=function(path){var isAbsolute=exports.isAbsolute(path),trailingSlash=substr(path,-1)==="/";path=normalizeArray(filter(path.split("/"),function(p){return!!p}),!isAbsolute).join("/");if(!path&&!isAbsolute){path="."}if(path&&trailingSlash){path+="/"}return(isAbsolute?"/":"")+path};exports.isAbsolute=function(path){return path.charAt(0)==="/"};exports.join=function(){var paths=Array.prototype.slice.call(arguments,0);return exports.normalize(filter(paths,function(p,index){if(typeof p!=="string"){throw new TypeError("Arguments to path.join must be strings")}return p}).join("/"))};exports.relative=function(from,to){from=exports.resolve(from).substr(1);to=exports.resolve(to).substr(1);function trim(arr){var start=0;for(;start<arr.length;start++){if(arr[start]!=="")break}var end=arr.length-1;for(;end>=0;end--){if(arr[end]!=="")break}if(start>end)return[];return arr.slice(start,end-start+1)}var fromParts=trim(from.split("/"));var toParts=trim(to.split("/"));var length=Math.min(fromParts.length,toParts.length);var samePartsLength=length;for(var i=0;i<length;i++){if(fromParts[i]!==toParts[i]){samePartsLength=i;break}}var outputParts=[];for(var i=samePartsLength;i<fromParts.length;i++){outputParts.push("..")}outputParts=outputParts.concat(toParts.slice(samePartsLength));return outputParts.join("/")};exports.sep="/";exports.delimiter=":";exports.dirname=function(path){var result=splitPath(path),root=result[0],dir=result[1];if(!root&&!dir){return"."}if(dir){dir=dir.substr(0,dir.length-1)}return root+dir};exports.basename=function(path,ext){var f=splitPath(path)[2];if(ext&&f.substr(-1*ext.length)===ext){f=f.substr(0,f.length-ext.length)}return f};exports.extname=function(path){return splitPath(path)[3]};function filter(xs,f){if(xs.filter)return xs.filter(f);var res=[];for(var i=0;i<xs.length;i++){if(f(xs[i],i,xs))res.push(xs[i])}return res}var substr="ab".substr(-1)==="b"?function(str,start,len){return str.substr(start,len)}:function(str,start,len){if(start<0)start=str.length+start;return str.substr(start,len)}}).call(this,require("_process"))},{_process:5}],5:[function(require,module,exports){var process=module.exports={};var queue=[];var draining=false;var currentQueue;var queueIndex=-1;function cleanUpNextTick(){draining=false;if(currentQueue.length){queue=currentQueue.concat(queue)}else{queueIndex=-1}if(queue.length){drainQueue()}}function drainQueue(){if(draining){return}var timeout=setTimeout(cleanUpNextTick);draining=true;var len=queue.length;while(len){currentQueue=queue;queue=[];while(++queueIndex<len){if(currentQueue){currentQueue[queueIndex].run()}}queueIndex=-1;len=queue.length}currentQueue=null;draining=false;clearTimeout(timeout)}process.nextTick=function(fun){var args=new Array(arguments.length-1);if(arguments.length>1){for(var i=1;i<arguments.length;i++){args[i-1]=arguments[i]}}queue.push(new Item(fun,args));if(queue.length===1&&!draining){setTimeout(drainQueue,0)}};function Item(fun,array){this.fun=fun;this.array=array}Item.prototype.run=function(){this.fun.apply(null,this.array)};process.title="browser";process.browser=true;process.env={};process.argv=[];process.version="";process.versions={};function noop(){}process.on=noop;process.addListener=noop;process.once=noop;process.off=noop;process.removeListener=noop;process.removeAllListeners=noop;process.emit=noop;process.binding=function(name){throw new Error("process.binding is not supported")};process.cwd=function(){return"/"};process.chdir=function(dir){throw new Error("process.chdir is not supported")};process.umask=function(){return 0}},{}],6:[function(require,module,exports){(function(global){(function(root){var freeExports=typeof exports=="object"&&exports&&!exports.nodeType&&exports;var freeModule=typeof module=="object"&&module&&!module.nodeType&&module;var freeGlobal=typeof global=="object"&&global;if(freeGlobal.global===freeGlobal||freeGlobal.window===freeGlobal||freeGlobal.self===freeGlobal){root=freeGlobal}var punycode,maxInt=2147483647,base=36,tMin=1,tMax=26,skew=38,damp=700,initialBias=72,initialN=128,delimiter="-",regexPunycode=/^xn--/,regexNonASCII=/[^\x20-\x7E]/,regexSeparators=/[\x2E\u3002\uFF0E\uFF61]/g,errors={overflow:"Overflow: input needs wider integers to process","not-basic":"Illegal input >= 0x80 (not a basic code point)","invalid-input":"Invalid input"},baseMinusTMin=base-tMin,floor=Math.floor,stringFromCharCode=String.fromCharCode,key;function error(type){throw RangeError(errors[type])}function map(array,fn){var length=array.length;var result=[];while(length--){result[length]=fn(array[length])}return result}function mapDomain(string,fn){var parts=string.split("@");var result="";if(parts.length>1){result=parts[0]+"@";string=parts[1]}string=string.replace(regexSeparators,".");var labels=string.split(".");var encoded=map(labels,fn).join(".");return result+encoded}function ucs2decode(string){var output=[],counter=0,length=string.length,value,extra;while(counter<length){value=string.charCodeAt(counter++);if(value>=55296&&value<=56319&&counter<length){extra=string.charCodeAt(counter++);if((extra&64512)==56320){output.push(((value&1023)<<10)+(extra&1023)+65536)}else{output.push(value);counter--}}else{output.push(value)}}return output}function ucs2encode(array){return map(array,function(value){var output="";if(value>65535){value-=65536;output+=stringFromCharCode(value>>>10&1023|55296);value=56320|value&1023}output+=stringFromCharCode(value);return output}).join("")}function basicToDigit(codePoint){if(codePoint-48<10){return codePoint-22}if(codePoint-65<26){return codePoint-65}if(codePoint-97<26){return codePoint-97}return base}function digitToBasic(digit,flag){return digit+22+75*(digit<26)-((flag!=0)<<5)}function adapt(delta,numPoints,firstTime){var k=0;delta=firstTime?floor(delta/damp):delta>>1;delta+=floor(delta/numPoints);for(;delta>baseMinusTMin*tMax>>1;k+=base){delta=floor(delta/baseMinusTMin)}return floor(k+(baseMinusTMin+1)*delta/(delta+skew))}function decode(input){var output=[],inputLength=input.length,out,i=0,n=initialN,bias=initialBias,basic,j,index,oldi,w,k,digit,t,baseMinusT;basic=input.lastIndexOf(delimiter);if(basic<0){basic=0}for(j=0;j<basic;++j){if(input.charCodeAt(j)>=128){error("not-basic")}output.push(input.charCodeAt(j))}for(index=basic>0?basic+1:0;index<inputLength;){for(oldi=i,w=1,k=base;;k+=base){if(index>=inputLength){error("invalid-input")}digit=basicToDigit(input.charCodeAt(index++));if(digit>=base||digit>floor((maxInt-i)/w)){error("overflow")}i+=digit*w;t=k<=bias?tMin:k>=bias+tMax?tMax:k-bias;if(digit<t){break}baseMinusT=base-t;if(w>floor(maxInt/baseMinusT)){error("overflow")}w*=baseMinusT}out=output.length+1;bias=adapt(i-oldi,out,oldi==0);if(floor(i/out)>maxInt-n){error("overflow")}n+=floor(i/out);i%=out;output.splice(i++,0,n)}return ucs2encode(output)}function encode(input){var n,delta,handledCPCount,basicLength,bias,j,m,q,k,t,currentValue,output=[],inputLength,handledCPCountPlusOne,baseMinusT,qMinusT;input=ucs2decode(input);inputLength=input.length;n=initialN;delta=0;bias=initialBias;for(j=0;j<inputLength;++j){currentValue=input[j];if(currentValue<128){output.push(stringFromCharCode(currentValue))}}handledCPCount=basicLength=output.length;if(basicLength){output.push(delimiter)}while(handledCPCount<inputLength){for(m=maxInt,j=0;j<inputLength;++j){currentValue=input[j];if(currentValue>=n&&currentValue<m){m=currentValue}}handledCPCountPlusOne=handledCPCount+1;if(m-n>floor((maxInt-delta)/handledCPCountPlusOne)){error("overflow")}delta+=(m-n)*handledCPCountPlusOne;n=m;for(j=0;j<inputLength;++j){currentValue=input[j];if(currentValue<n&&++delta>maxInt){error("overflow")}if(currentValue==n){for(q=delta,k=base;;k+=base){t=k<=bias?tMin:k>=bias+tMax?tMax:k-bias;if(q<t){break}qMinusT=q-t;baseMinusT=base-t;output.push(stringFromCharCode(digitToBasic(t+qMinusT%baseMinusT,0)));q=floor(qMinusT/baseMinusT)}output.push(stringFromCharCode(digitToBasic(q,0)));bias=adapt(delta,handledCPCountPlusOne,handledCPCount==basicLength);delta=0;++handledCPCount}}++delta;++n}return output.join("")}function toUnicode(input){return mapDomain(input,function(string){return regexPunycode.test(string)?decode(string.slice(4).toLowerCase()):string})}function toASCII(input){return mapDomain(input,function(string){return regexNonASCII.test(string)?"xn--"+encode(string):string})}punycode={version:"1.3.2",ucs2:{decode:ucs2decode,encode:ucs2encode},decode:decode,encode:encode,toASCII:toASCII,toUnicode:toUnicode};if(typeof define=="function"&&typeof define.amd=="object"&&define.amd){define("punycode",function(){return punycode})}else if(freeExports&&freeModule){if(module.exports==freeExports){freeModule.exports=punycode}else{for(key in punycode){punycode.hasOwnProperty(key)&&(freeExports[key]=punycode[key])}}}else{root.punycode=punycode}})(this)}).call(this,typeof global!=="undefined"?global:typeof self!=="undefined"?self:typeof window!=="undefined"?window:{})},{}],7:[function(require,module,exports){"use strict";function hasOwnProperty(obj,prop){return Object.prototype.hasOwnProperty.call(obj,prop)}module.exports=function(qs,sep,eq,options){sep=sep||"&";eq=eq||"=";var obj={};if(typeof qs!=="string"||qs.length===0){return obj}var regexp=/\+/g;qs=qs.split(sep);var maxKeys=1e3;if(options&&typeof options.maxKeys==="number"){maxKeys=options.maxKeys}var len=qs.length;if(maxKeys>0&&len>maxKeys){len=maxKeys}for(var i=0;i<len;++i){var x=qs[i].replace(regexp,"%20"),idx=x.indexOf(eq),kstr,vstr,k,v;if(idx>=0){kstr=x.substr(0,idx);vstr=x.substr(idx+1)}else{kstr=x;vstr=""}k=decodeURIComponent(kstr);v=decodeURIComponent(vstr);if(!hasOwnProperty(obj,k)){obj[k]=v}else if(isArray(obj[k])){obj[k].push(v)}else{obj[k]=[obj[k],v]}}return obj};var isArray=Array.isArray||function(xs){return Object.prototype.toString.call(xs)==="[object Array]"}},{}],8:[function(require,module,exports){"use strict";var stringifyPrimitive=function(v){switch(typeof v){case"string":return v;case"boolean":return v?"true":"false";case"number":return isFinite(v)?v:"";default:return""}};module.exports=function(obj,sep,eq,name){sep=sep||"&";eq=eq||"=";if(obj===null){obj=undefined}if(typeof obj==="object"){return map(objectKeys(obj),function(k){var ks=encodeURIComponent(stringifyPrimitive(k))+eq;if(isArray(obj[k])){return map(obj[k],function(v){return ks+encodeURIComponent(stringifyPrimitive(v))}).join(sep)}else{return ks+encodeURIComponent(stringifyPrimitive(obj[k]))}}).join(sep)}if(!name)return"";return encodeURIComponent(stringifyPrimitive(name))+eq+encodeURIComponent(stringifyPrimitive(obj))};var isArray=Array.isArray||function(xs){return Object.prototype.toString.call(xs)==="[object Array]"};function map(xs,f){if(xs.map)return xs.map(f);var res=[];for(var i=0;i<xs.length;i++){res.push(f(xs[i],i))}return res}var objectKeys=Object.keys||function(obj){var res=[];for(var key in obj){if(Object.prototype.hasOwnProperty.call(obj,key))res.push(key)}return res}},{}],9:[function(require,module,exports){"use strict";exports.decode=exports.parse=require("./decode");exports.encode=exports.stringify=require("./encode")},{"./decode":7,"./encode":8}],10:[function(require,module,exports){var punycode=require("punycode");exports.parse=urlParse;exports.resolve=urlResolve;exports.resolveObject=urlResolveObject;exports.format=urlFormat;exports.Url=Url;function Url(){this.protocol=null;this.slashes=null;this.auth=null;this.host=null;this.port=null;this.hostname=null;this.hash=null;this.search=null;this.query=null;this.pathname=null;this.path=null;this.href=null}var protocolPattern=/^([a-z0-9.+-]+:)/i,portPattern=/:[0-9]*$/,delims=["<",">",'"',"`"," ","\r","\n","	"],unwise=["{","}","|","\\","^","`"].concat(delims),autoEscape=["'"].concat(unwise),nonHostChars=["%","/","?",";","#"].concat(autoEscape),hostEndingChars=["/","?","#"],hostnameMaxLen=255,hostnamePartPattern=/^[a-z0-9A-Z_-]{0,63}$/,hostnamePartStart=/^([a-z0-9A-Z_-]{0,63})(.*)$/,unsafeProtocol={javascript:true,"javascript:":true},hostlessProtocol={javascript:true,"javascript:":true},slashedProtocol={http:true,https:true,ftp:true,gopher:true,file:true,"http:":true,"https:":true,"ftp:":true,"gopher:":true,"file:":true},querystring=require("querystring");function urlParse(url,parseQueryString,slashesDenoteHost){if(url&&isObject(url)&&url instanceof Url)return url;var u=new Url;u.parse(url,parseQueryString,slashesDenoteHost);return u}Url.prototype.parse=function(url,parseQueryString,slashesDenoteHost){if(!isString(url)){throw new TypeError("Parameter 'url' must be a string, not "+typeof url)}var rest=url;rest=rest.trim();var proto=protocolPattern.exec(rest);if(proto){proto=proto[0];var lowerProto=proto.toLowerCase();this.protocol=lowerProto;rest=rest.substr(proto.length)}if(slashesDenoteHost||proto||rest.match(/^\/\/[^@\/]+@[^@\/]+/)){var slashes=rest.substr(0,2)==="//";if(slashes&&!(proto&&hostlessProtocol[proto])){rest=rest.substr(2);this.slashes=true}}if(!hostlessProtocol[proto]&&(slashes||proto&&!slashedProtocol[proto])){var hostEnd=-1;for(var i=0;i<hostEndingChars.length;i++){var hec=rest.indexOf(hostEndingChars[i]);if(hec!==-1&&(hostEnd===-1||hec<hostEnd))hostEnd=hec}var auth,atSign;if(hostEnd===-1){atSign=rest.lastIndexOf("@")}else{atSign=rest.lastIndexOf("@",hostEnd)}if(atSign!==-1){auth=rest.slice(0,atSign);rest=rest.slice(atSign+1);this.auth=decodeURIComponent(auth)}hostEnd=-1;for(var i=0;i<nonHostChars.length;i++){var hec=rest.indexOf(nonHostChars[i]);if(hec!==-1&&(hostEnd===-1||hec<hostEnd))hostEnd=hec}if(hostEnd===-1)hostEnd=rest.length;this.host=rest.slice(0,hostEnd);rest=rest.slice(hostEnd);this.parseHost();this.hostname=this.hostname||"";var ipv6Hostname=this.hostname[0]==="["&&this.hostname[this.hostname.length-1]==="]";if(!ipv6Hostname){var hostparts=this.hostname.split(/\./);
+for(var i=0,l=hostparts.length;i<l;i++){var part=hostparts[i];if(!part)continue;if(!part.match(hostnamePartPattern)){var newpart="";for(var j=0,k=part.length;j<k;j++){if(part.charCodeAt(j)>127){newpart+="x"}else{newpart+=part[j]}}if(!newpart.match(hostnamePartPattern)){var validParts=hostparts.slice(0,i);var notHost=hostparts.slice(i+1);var bit=part.match(hostnamePartStart);if(bit){validParts.push(bit[1]);notHost.unshift(bit[2])}if(notHost.length){rest="/"+notHost.join(".")+rest}this.hostname=validParts.join(".");break}}}}if(this.hostname.length>hostnameMaxLen){this.hostname=""}else{this.hostname=this.hostname.toLowerCase()}if(!ipv6Hostname){var domainArray=this.hostname.split(".");var newOut=[];for(var i=0;i<domainArray.length;++i){var s=domainArray[i];newOut.push(s.match(/[^A-Za-z0-9_-]/)?"xn--"+punycode.encode(s):s)}this.hostname=newOut.join(".")}var p=this.port?":"+this.port:"";var h=this.hostname||"";this.host=h+p;this.href+=this.host;if(ipv6Hostname){this.hostname=this.hostname.substr(1,this.hostname.length-2);if(rest[0]!=="/"){rest="/"+rest}}}if(!unsafeProtocol[lowerProto]){for(var i=0,l=autoEscape.length;i<l;i++){var ae=autoEscape[i];var esc=encodeURIComponent(ae);if(esc===ae){esc=escape(ae)}rest=rest.split(ae).join(esc)}}var hash=rest.indexOf("#");if(hash!==-1){this.hash=rest.substr(hash);rest=rest.slice(0,hash)}var qm=rest.indexOf("?");if(qm!==-1){this.search=rest.substr(qm);this.query=rest.substr(qm+1);if(parseQueryString){this.query=querystring.parse(this.query)}rest=rest.slice(0,qm)}else if(parseQueryString){this.search="";this.query={}}if(rest)this.pathname=rest;if(slashedProtocol[lowerProto]&&this.hostname&&!this.pathname){this.pathname="/"}if(this.pathname||this.search){var p=this.pathname||"";var s=this.search||"";this.path=p+s}this.href=this.format();return this};function urlFormat(obj){if(isString(obj))obj=urlParse(obj);if(!(obj instanceof Url))return Url.prototype.format.call(obj);return obj.format()}Url.prototype.format=function(){var auth=this.auth||"";if(auth){auth=encodeURIComponent(auth);auth=auth.replace(/%3A/i,":");auth+="@"}var protocol=this.protocol||"",pathname=this.pathname||"",hash=this.hash||"",host=false,query="";if(this.host){host=auth+this.host}else if(this.hostname){host=auth+(this.hostname.indexOf(":")===-1?this.hostname:"["+this.hostname+"]");if(this.port){host+=":"+this.port}}if(this.query&&isObject(this.query)&&Object.keys(this.query).length){query=querystring.stringify(this.query)}var search=this.search||query&&"?"+query||"";if(protocol&&protocol.substr(-1)!==":")protocol+=":";if(this.slashes||(!protocol||slashedProtocol[protocol])&&host!==false){host="//"+(host||"");if(pathname&&pathname.charAt(0)!=="/")pathname="/"+pathname}else if(!host){host=""}if(hash&&hash.charAt(0)!=="#")hash="#"+hash;if(search&&search.charAt(0)!=="?")search="?"+search;pathname=pathname.replace(/[?#]/g,function(match){return encodeURIComponent(match)});search=search.replace("#","%23");return protocol+host+pathname+search+hash};function urlResolve(source,relative){return urlParse(source,false,true).resolve(relative)}Url.prototype.resolve=function(relative){return this.resolveObject(urlParse(relative,false,true)).format()};function urlResolveObject(source,relative){if(!source)return relative;return urlParse(source,false,true).resolveObject(relative)}Url.prototype.resolveObject=function(relative){if(isString(relative)){var rel=new Url;rel.parse(relative,false,true);relative=rel}var result=new Url;Object.keys(this).forEach(function(k){result[k]=this[k]},this);result.hash=relative.hash;if(relative.href===""){result.href=result.format();return result}if(relative.slashes&&!relative.protocol){Object.keys(relative).forEach(function(k){if(k!=="protocol")result[k]=relative[k]});if(slashedProtocol[result.protocol]&&result.hostname&&!result.pathname){result.path=result.pathname="/"}result.href=result.format();return result}if(relative.protocol&&relative.protocol!==result.protocol){if(!slashedProtocol[relative.protocol]){Object.keys(relative).forEach(function(k){result[k]=relative[k]});result.href=result.format();return result}result.protocol=relative.protocol;if(!relative.host&&!hostlessProtocol[relative.protocol]){var relPath=(relative.pathname||"").split("/");while(relPath.length&&!(relative.host=relPath.shift()));if(!relative.host)relative.host="";if(!relative.hostname)relative.hostname="";if(relPath[0]!=="")relPath.unshift("");if(relPath.length<2)relPath.unshift("");result.pathname=relPath.join("/")}else{result.pathname=relative.pathname}result.search=relative.search;result.query=relative.query;result.host=relative.host||"";result.auth=relative.auth;result.hostname=relative.hostname||relative.host;result.port=relative.port;if(result.pathname||result.search){var p=result.pathname||"";var s=result.search||"";result.path=p+s}result.slashes=result.slashes||relative.slashes;result.href=result.format();return result}var isSourceAbs=result.pathname&&result.pathname.charAt(0)==="/",isRelAbs=relative.host||relative.pathname&&relative.pathname.charAt(0)==="/",mustEndAbs=isRelAbs||isSourceAbs||result.host&&relative.pathname,removeAllDots=mustEndAbs,srcPath=result.pathname&&result.pathname.split("/")||[],relPath=relative.pathname&&relative.pathname.split("/")||[],psychotic=result.protocol&&!slashedProtocol[result.protocol];if(psychotic){result.hostname="";result.port=null;if(result.host){if(srcPath[0]==="")srcPath[0]=result.host;else srcPath.unshift(result.host)}result.host="";if(relative.protocol){relative.hostname=null;relative.port=null;if(relative.host){if(relPath[0]==="")relPath[0]=relative.host;else relPath.unshift(relative.host)}relative.host=null}mustEndAbs=mustEndAbs&&(relPath[0]===""||srcPath[0]==="")}if(isRelAbs){result.host=relative.host||relative.host===""?relative.host:result.host;result.hostname=relative.hostname||relative.hostname===""?relative.hostname:result.hostname;result.search=relative.search;result.query=relative.query;srcPath=relPath}else if(relPath.length){if(!srcPath)srcPath=[];srcPath.pop();srcPath=srcPath.concat(relPath);result.search=relative.search;result.query=relative.query}else if(!isNullOrUndefined(relative.search)){if(psychotic){result.hostname=result.host=srcPath.shift();var authInHost=result.host&&result.host.indexOf("@")>0?result.host.split("@"):false;if(authInHost){result.auth=authInHost.shift();result.host=result.hostname=authInHost.shift()}}result.search=relative.search;result.query=relative.query;if(!isNull(result.pathname)||!isNull(result.search)){result.path=(result.pathname?result.pathname:"")+(result.search?result.search:"")}result.href=result.format();return result}if(!srcPath.length){result.pathname=null;if(result.search){result.path="/"+result.search}else{result.path=null}result.href=result.format();return result}var last=srcPath.slice(-1)[0];var hasTrailingSlash=(result.host||relative.host)&&(last==="."||last==="..")||last==="";var up=0;for(var i=srcPath.length;i>=0;i--){last=srcPath[i];if(last=="."){srcPath.splice(i,1)}else if(last===".."){srcPath.splice(i,1);up++}else if(up){srcPath.splice(i,1);up--}}if(!mustEndAbs&&!removeAllDots){for(;up--;up){srcPath.unshift("..")}}if(mustEndAbs&&srcPath[0]!==""&&(!srcPath[0]||srcPath[0].charAt(0)!=="/")){srcPath.unshift("")}if(hasTrailingSlash&&srcPath.join("/").substr(-1)!=="/"){srcPath.push("")}var isAbsolute=srcPath[0]===""||srcPath[0]&&srcPath[0].charAt(0)==="/";if(psychotic){result.hostname=result.host=isAbsolute?"":srcPath.length?srcPath.shift():"";var authInHost=result.host&&result.host.indexOf("@")>0?result.host.split("@"):false;if(authInHost){result.auth=authInHost.shift();result.host=result.hostname=authInHost.shift()}}mustEndAbs=mustEndAbs||result.host&&srcPath.length;if(mustEndAbs&&!isAbsolute){srcPath.unshift("")}if(!srcPath.length){result.pathname=null;result.path=null}else{result.pathname=srcPath.join("/")}if(!isNull(result.pathname)||!isNull(result.search)){result.path=(result.pathname?result.pathname:"")+(result.search?result.search:"")}result.auth=relative.auth||result.auth;result.slashes=result.slashes||relative.slashes;result.href=result.format();return result};Url.prototype.parseHost=function(){var host=this.host;var port=portPattern.exec(host);if(port){port=port[0];if(port!==":"){this.port=port.substr(1)}host=host.substr(0,host.length-port.length)}if(host)this.hostname=host};function isString(arg){return typeof arg==="string"}function isObject(arg){return typeof arg==="object"&&arg!==null}function isNull(arg){return arg===null}function isNullOrUndefined(arg){return arg==null}},{punycode:6,querystring:9}],11:[function(require,module,exports){var $=require("jquery");function toggleDropdown(e){var $dropdown=$(e.currentTarget).parent().find(".dropdown-menu");$dropdown.toggleClass("open");e.stopPropagation();e.preventDefault()}function closeDropdown(e){$(".dropdown-menu").removeClass("open")}function init(){$(document).on("click",".toggle-dropdown",toggleDropdown);$(document).on("click",".dropdown-menu",function(e){e.stopPropagation()});$(document).on("click",closeDropdown)}module.exports={init:init}},{jquery:1}],12:[function(require,module,exports){var $=require("jquery");module.exports=$({})},{jquery:1}],13:[function(require,module,exports){var $=require("jquery");var _=require("lodash");var storage=require("./storage");var dropdown=require("./dropdown");var events=require("./events");var state=require("./state");var keyboard=require("./keyboard");var navigation=require("./navigation");var sidebar=require("./sidebar");var toolbar=require("./toolbar");function start(config){sidebar.init();keyboard.init();dropdown.init();navigation.init();toolbar.createButton({index:0,icon:"fa fa-align-justify",onClick:function(e){e.preventDefault();sidebar.toggle()}});events.trigger("start",config);navigation.notify()}var gitbook={start:start,events:events,state:state,toolbar:toolbar,sidebar:sidebar,storage:storage,keyboard:keyboard};var MODULES={gitbook:gitbook,jquery:$,lodash:_};window.gitbook=gitbook;window.$=$;window.jQuery=$;gitbook.require=function(mods,fn){mods=_.map(mods,function(mod){mod=mod.toLowerCase();if(!MODULES[mod]){throw new Error("GitBook module "+mod+" doesn't exist")}return MODULES[mod]});fn.apply(null,mods)};module.exports={}},{"./dropdown":11,"./events":12,"./keyboard":14,"./navigation":16,"./sidebar":18,"./state":19,"./storage":20,"./toolbar":21,jquery:1,lodash:2}],14:[function(require,module,exports){var Mousetrap=require("mousetrap");var navigation=require("./navigation");var sidebar=require("./sidebar");function bindShortcut(keys,fn){Mousetrap.bind(keys,function(e){fn();return false})}function init(){bindShortcut(["right"],function(e){navigation.goNext()});bindShortcut(["left"],function(e){navigation.goPrev()});bindShortcut(["s"],function(e){sidebar.toggle()})}module.exports={init:init,bind:bindShortcut}},{"./navigation":16,"./sidebar":18,mousetrap:3}],15:[function(require,module,exports){var state=require("./state");function showLoading(p){state.$book.addClass("is-loading");p.always(function(){state.$book.removeClass("is-loading")});return p}module.exports={show:showLoading}},{"./state":19}],16:[function(require,module,exports){var $=require("jquery");var url=require("url");var events=require("./events");var state=require("./state");var loading=require("./loading");var usePushState=typeof history.pushState!=="undefined";function handleNavigation(relativeUrl,push){var uri=url.resolve(window.location.pathname,relativeUrl);notifyPageChange();location.href=relativeUrl;return;return loading.show($.get(uri).done(function(html){if(push)history.pushState({path:uri},null,uri);html=html.replace(/<(\/?)(html|head|body)([^>]*)>/gi,function(a,b,c,d){return"<"+b+"div"+(b?"":' data-element="'+c+'"')+d+">"});var $page=$(html);var $pageHead=$page.find("[data-element=head]");var $pageBody=$page.find(".book");document.title=$pageHead.find("title").text();var $head=$("head");$head.find("link[rel=prev]").remove();$head.find("link[rel=next]").remove();$head.append($pageHead.find("link[rel=prev]"));$head.append($pageHead.find("link[rel=next]"));var bodyClass=$(".book").attr("class");var scrollPosition=$(".book-summary .summary").scrollTop();$pageBody.toggleClass("with-summary",$(".book").hasClass("with-summary"));$(".book").replaceWith($pageBody);$(".book").attr("class",bodyClass);$(".book-summary .summary").scrollTop(scrollPosition);state.update($("html"));preparePage()}).fail(function(e){location.href=relativeUrl}))}function updateNavigationPosition(){var bodyInnerWidth,pageWrapperWidth;bodyInnerWidth=parseInt($(".body-inner").css("width"),10);pageWrapperWidth=parseInt($(".page-wrapper").css("width"),10);$(".navigation-next").css("margin-right",bodyInnerWidth-pageWrapperWidth+"px")}function notifyPageChange(){events.trigger("page.change")}function preparePage(notify){var $bookBody=$(".book-body");var $bookInner=$bookBody.find(".body-inner");var $pageWrapper=$bookInner.find(".page-wrapper");updateNavigationPosition();$bookInner.scrollTop(0);$bookBody.scrollTop(0);if(notify!==false)notifyPageChange()}function isLeftClickEvent(e){return e.button===0}function isModifiedEvent(e){return!!(e.metaKey||e.altKey||e.ctrlKey||e.shiftKey)}function handlePagination(e){if(isModifiedEvent(e)||!isLeftClickEvent(e)){return}e.stopPropagation();e.preventDefault();var url=$(this).attr("href");if(url)handleNavigation(url,true)}function goNext(){var url=$(".navigation-next").attr("href");if(url)handleNavigation(url,true)}function goPrev(){var url=$(".navigation-prev").attr("href");if(url)handleNavigation(url,true)}function init(){$.ajaxSetup({});if(location.protocol!=="file:"){history.replaceState({path:window.location.href},"")}window.onpopstate=function(event){if(event.state===null){return}return handleNavigation(event.state.path,false)};$(document).on("click",".navigation-prev",handlePagination);$(document).on("click",".navigation-next",handlePagination);$(document).on("click",".summary [data-path] a",handlePagination);$(window).resize(updateNavigationPosition);preparePage(false)}module.exports={init:init,goNext:goNext,goPrev:goPrev,notify:notifyPageChange}},{"./events":12,"./loading":15,"./state":19,jquery:1,url:10}],17:[function(require,module,exports){module.exports={isMobile:function(){return document.body.clientWidth<=600}}},{}],18:[function(require,module,exports){var $=require("jquery");var _=require("lodash");var storage=require("./storage");var platform=require("./platform");var state=require("./state");function toggleSidebar(_state,animation){if(state!=null&&isOpen()==_state)return;if(animation==null)animation=true;state.$book.toggleClass("without-animation",!animation);state.$book.toggleClass("with-summary",_state);storage.set("sidebar",isOpen())}function isOpen(){return state.$book.hasClass("with-summary")}function init(){if(platform.isMobile()){toggleSidebar(false,false)}else{toggleSidebar(storage.get("sidebar",true),false)}$(document).on("click",".book-summary li.chapter a",function(e){if(platform.isMobile())toggleSidebar(false,false)})}function filterSummary(paths){var $summary=$(".book-summary");$summary.find("li").each(function(){var path=$(this).data("path");var st=paths==null||_.contains(paths,path);$(this).toggle(st);if(st)$(this).parents("li").show()})}module.exports={init:init,isOpen:isOpen,toggle:toggleSidebar,filter:filterSummary}},{"./platform":17,"./state":19,"./storage":20,jquery:1,lodash:2}],19:[function(require,module,exports){var $=require("jquery");var url=require("url");var path=require("path");var state={};state.update=function(dom){var $book=$(dom.find(".book"));state.$book=$book;state.level=$book.data("level");state.basePath=$book.data("basepath");state.innerLanguage=$book.data("innerlanguage");state.revision=$book.data("revision");state.filepath=$book.data("filepath");state.chapterTitle=$book.data("chapter-title");state.root=url.resolve(location.protocol+"//"+location.host,path.dirname(path.resolve(location.pathname.replace(/\/$/,"/index.html"),state.basePath))).replace(/\/?$/,"/");state.bookRoot=state.innerLanguage?url.resolve(state.root,".."):state.root};state.update($);module.exports=state},{jquery:1,path:4,url:10}],20:[function(require,module,exports){var baseKey="";module.exports={setBaseKey:function(key){baseKey=key},set:function(key,value){key=baseKey+":"+key;try{localStorage[key]=JSON.stringify(value)}catch(e){}},get:function(key,def){key=baseKey+":"+key;if(localStorage[key]===undefined)return def;try{var v=JSON.parse(localStorage[key]);return v==null?def:v}catch(err){return localStorage[key]||def}},remove:function(key){key=baseKey+":"+key;localStorage.removeItem(key)}}},{}],21:[function(require,module,exports){var $=require("jquery");var _=require("lodash");var events=require("./events");var buttons=[];function insertAt(parent,selector,index,element){var lastIndex=parent.children(selector).size();if(index<0){index=Math.max(0,lastIndex+1+index)}parent.append(element);if(index<lastIndex){parent.children(selector).eq(index).before(parent.children(selector).last())}}function defaultOnClick(e){e.preventDefault()}function createDropdownMenu(dropdown){var $menu=$("<div>",{"class":"dropdown-menu",html:'<div class="dropdown-caret"><span class="caret-outer"></span><span class="caret-inner"></span></div>'});if(_.isString(dropdown)){$menu.append(dropdown)}else{var groups=_.map(dropdown,function(group){if(_.isArray(group))return group;else return[group]});_.each(groups,function(group){var $group=$("<div>",{"class":"buttons"});var sizeClass="size-"+group.length;_.each(group,function(btn){btn=_.defaults(btn||{},{text:"",className:"",onClick:defaultOnClick});var $btn=$("<button>",{"class":"button "+sizeClass+" "+btn.className,text:btn.text});$btn.click(btn.onClick);$group.append($btn)});$menu.append($group)})}return $menu}function createButton(opts){opts=_.defaults(opts||{},{label:"",icon:"",text:"",position:"left",className:"",onClick:defaultOnClick,dropdown:null,index:null});buttons.push(opts);updateButton(opts)}function updateButton(opts){var $result;var $toolbar=$(".book-header");var $title=$toolbar.find("h1");var positionClass="pull-"+opts.position;var $btn=$("<a>",{"class":"btn",text:opts.text?" "+opts.text:"","aria-label":opts.label,href:"#"});$btn.click(opts.onClick);if(opts.icon){$("<i>",{"class":opts.icon}).prependTo($btn)}if(opts.dropdown){var $container=$("<div>",{"class":"dropdown "+positionClass+" "+opts.className});$btn.addClass("toggle-dropdown");$container.append($btn);var $menu=createDropdownMenu(opts.dropdown);$menu.addClass("dropdown-"+(opts.position=="right"?"left":"right"));$container.append($menu);$result=$container}else{$btn.addClass(positionClass);$btn.addClass(opts.className);$result=$btn}$result.addClass("js-toolbar-action");if(_.isNumber(opts.index)&&opts.index>=0){insertAt($toolbar,".btn, .dropdown, h1",opts.index,$result)}else{$result.insertBefore($title)}}module.exports={createButton:createButton}},{"./events":12,jquery:1,lodash:2}]},{},[13]);
+//# sourceMappingURL=app.min.map
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/jquery.highlight.js b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/jquery.highlight.js
new file mode 100644
index 0000000..a0b69fc
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/jquery.highlight.js
@@ -0,0 +1,84 @@
+gitbook.require(["jQuery"], function(jQuery) {
+
+/*
+ * jQuery Highlight plugin
+ *
+ * Based on highlight v3 by Johann Burkard
+ * http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html
+ *
+ * Code a little bit refactored and cleaned (in my humble opinion).
+ * Most important changes:
+ *  - has an option to highlight only entire words (wordsOnly - false by default),
+ *  - has an option to be case sensitive (caseSensitive - false by default)
+ *  - highlight element tag and class names can be specified in options
+ *
+ * Copyright (c) 2009 Bartek Szopka
+ *
+ * Licensed under MIT license.
+ *
+ */
+
+jQuery.extend({
+    highlight: function (node, re, nodeName, className) {
+        if (node.nodeType === 3) {
+            var match = node.data.match(re);
+            if (match) {
+                var highlight = document.createElement(nodeName || 'span');
+                highlight.className = className || 'highlight';
+                var wordNode = node.splitText(match.index);
+                wordNode.splitText(match[0].length);
+                var wordClone = wordNode.cloneNode(true);
+                highlight.appendChild(wordClone);
+                wordNode.parentNode.replaceChild(highlight, wordNode);
+                return 1; //skip added node in parent
+            }
+        } else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children
+                !/(script|style)/i.test(node.tagName) && // ignore script and style nodes
+                !(node.tagName === nodeName.toUpperCase() && node.className === className)) { // skip if already highlighted
+            for (var i = 0; i < node.childNodes.length; i++) {
+                i += jQuery.highlight(node.childNodes[i], re, nodeName, className);
+            }
+        }
+        return 0;
+    }
+});
+
+jQuery.fn.unhighlight = function (options) {
+    var settings = { className: 'highlight', element: 'span' };
+    jQuery.extend(settings, options);
+
+    return this.find(settings.element + "." + settings.className).each(function () {
+        var parent = this.parentNode;
+        parent.replaceChild(this.firstChild, this);
+        parent.normalize();
+    }).end();
+};
+
+jQuery.fn.highlight = function (words, options) {
+    var settings = { className: 'highlight', element: 'span', caseSensitive: false, wordsOnly: false };
+    jQuery.extend(settings, options);
+
+    if (words.constructor === String) {
+        words = [words];
+    }
+    words = jQuery.grep(words, function(word, i){
+      return word !== '';
+    });
+    words = jQuery.map(words, function(word, i) {
+      return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
+    });
+    if (words.length === 0) { return this; }
+
+    var flag = settings.caseSensitive ? "" : "i";
+    var pattern = "(" + words.join("|") + ")";
+    if (settings.wordsOnly) {
+        pattern = "\\b" + pattern + "\\b";
+    }
+    var re = new RegExp(pattern, flag);
+
+    return this.each(function () {
+        jQuery.highlight(this, re, settings.element, settings.className);
+    });
+};
+
+});
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/lunr.js b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/lunr.js
new file mode 100644
index 0000000..3f846a1
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/lunr.js
@@ -0,0 +1,7 @@
+/**
+ * lunr - http://lunrjs.com - A bit like Solr, but much smaller and not as bright - 0.5.12
+ * Copyright (C) 2015 Oliver Nightingale
+ * MIT Licensed
+ * @license
+ */
+!function(){var t=function(e){var n=new t.Index;return n.pipeline.add(t.trimmer,t.stopWordFilter,t.stemmer),e&&e.call(n,n),n};t.version="0.5.12",t.utils={},t.utils.warn=function(t){return function(e){t.console&&console.warn&&console.warn(e)}}(this),t.EventEmitter=function(){this.events={}},t.EventEmitter.prototype.addListener=function(){var t=Array.prototype.slice.call(arguments),e=t.pop(),n=t;if("function"!=typeof e)throw new TypeError("last argument must be a function");n.forEach(function(t){this.hasHandler(t)||(this.events[t]=[]),this.events[t].push(e)},this)},t.EventEmitter.prototype.removeListener=function(t,e){if(this.hasHandler(t)){var n=this.events[t].indexOf(e);this.events[t].splice(n,1),this.events[t].length||delete this.events[t]}},t.EventEmitter.prototype.emit=function(t){if(this.hasHandler(t)){var e=Array.prototype.slice.call(arguments,1);this.events[t].forEach(function(t){t.apply(void 0,e)})}},t.EventEmitter.prototype.hasHandler=function(t){return t in this.events},t.tokenizer=function(t){return arguments.length&&null!=t&&void 0!=t?Array.isArray(t)?t.map(function(t){return t.toLowerCase()}):t.toString().trim().toLowerCase().split(/[\s\-\/]+/):[]},t.Pipeline=function(){this._stack=[]},t.Pipeline.registeredFunctions={},t.Pipeline.registerFunction=function(e,n){n in this.registeredFunctions&&t.utils.warn("Overwriting existing registered function: "+n),e.label=n,t.Pipeline.registeredFunctions[e.label]=e},t.Pipeline.warnIfFunctionNotRegistered=function(e){var n=e.label&&e.label in this.registeredFunctions;n||t.utils.warn("Function is not registered with pipeline. This may cause problems when serialising the index.\n",e)},t.Pipeline.load=function(e){var n=new t.Pipeline;return e.forEach(function(e){var i=t.Pipeline.registeredFunctions[e];if(!i)throw new Error("Cannot load un-registered function: "+e);n.add(i)}),n},t.Pipeline.prototype.add=function(){var e=Array.prototype.slice.call(arguments);e.forEach(function(e){t.Pipeline.warnIfFunctionNotRegistered(e),this._stack.push(e)},this)},t.Pipeline.prototype.after=function(e,n){t.Pipeline.warnIfFunctionNotRegistered(n);var i=this._stack.indexOf(e);if(-1==i)throw new Error("Cannot find existingFn");i+=1,this._stack.splice(i,0,n)},t.Pipeline.prototype.before=function(e,n){t.Pipeline.warnIfFunctionNotRegistered(n);var i=this._stack.indexOf(e);if(-1==i)throw new Error("Cannot find existingFn");this._stack.splice(i,0,n)},t.Pipeline.prototype.remove=function(t){var e=this._stack.indexOf(t);-1!=e&&this._stack.splice(e,1)},t.Pipeline.prototype.run=function(t){for(var e=[],n=t.length,i=this._stack.length,o=0;n>o;o++){for(var r=t[o],s=0;i>s&&(r=this._stack[s](r,o,t),void 0!==r);s++);void 0!==r&&e.push(r)}return e},t.Pipeline.prototype.reset=function(){this._stack=[]},t.Pipeline.prototype.toJSON=function(){return this._stack.map(function(e){return t.Pipeline.warnIfFunctionNotRegistered(e),e.label})},t.Vector=function(){this._magnitude=null,this.list=void 0,this.length=0},t.Vector.Node=function(t,e,n){this.idx=t,this.val=e,this.next=n},t.Vector.prototype.insert=function(e,n){this._magnitude=void 0;var i=this.list;if(!i)return this.list=new t.Vector.Node(e,n,i),this.length++;if(e<i.idx)return this.list=new t.Vector.Node(e,n,i),this.length++;for(var o=i,r=i.next;void 0!=r;){if(e<r.idx)return o.next=new t.Vector.Node(e,n,r),this.length++;o=r,r=r.next}return o.next=new t.Vector.Node(e,n,r),this.length++},t.Vector.prototype.magnitude=function(){if(this._magnitude)return this._magnitude;for(var t,e=this.list,n=0;e;)t=e.val,n+=t*t,e=e.next;return this._magnitude=Math.sqrt(n)},t.Vector.prototype.dot=function(t){for(var e=this.list,n=t.list,i=0;e&&n;)e.idx<n.idx?e=e.next:e.idx>n.idx?n=n.next:(i+=e.val*n.val,e=e.next,n=n.next);return i},t.Vector.prototype.similarity=function(t){return this.dot(t)/(this.magnitude()*t.magnitude())},t.SortedSet=function(){this.length=0,this.elements=[]},t.SortedSet.load=function(t){var e=new this;return e.elements=t,e.length=t.length,e},t.SortedSet.prototype.add=function(){var t,e;for(t=0;t<arguments.length;t++)e=arguments[t],~this.indexOf(e)||this.elements.splice(this.locationFor(e),0,e);this.length=this.elements.length},t.SortedSet.prototype.toArray=function(){return this.elements.slice()},t.SortedSet.prototype.map=function(t,e){return this.elements.map(t,e)},t.SortedSet.prototype.forEach=function(t,e){return this.elements.forEach(t,e)},t.SortedSet.prototype.indexOf=function(t){for(var e=0,n=this.elements.length,i=n-e,o=e+Math.floor(i/2),r=this.elements[o];i>1;){if(r===t)return o;t>r&&(e=o),r>t&&(n=o),i=n-e,o=e+Math.floor(i/2),r=this.elements[o]}return r===t?o:-1},t.SortedSet.prototype.locationFor=function(t){for(var e=0,n=this.elements.length,i=n-e,o=e+Math.floor(i/2),r=this.elements[o];i>1;)t>r&&(e=o),r>t&&(n=o),i=n-e,o=e+Math.floor(i/2),r=this.elements[o];return r>t?o:t>r?o+1:void 0},t.SortedSet.prototype.intersect=function(e){for(var n=new t.SortedSet,i=0,o=0,r=this.length,s=e.length,a=this.elements,h=e.elements;;){if(i>r-1||o>s-1)break;a[i]!==h[o]?a[i]<h[o]?i++:a[i]>h[o]&&o++:(n.add(a[i]),i++,o++)}return n},t.SortedSet.prototype.clone=function(){var e=new t.SortedSet;return e.elements=this.toArray(),e.length=e.elements.length,e},t.SortedSet.prototype.union=function(t){var e,n,i;return this.length>=t.length?(e=this,n=t):(e=t,n=this),i=e.clone(),i.add.apply(i,n.toArray()),i},t.SortedSet.prototype.toJSON=function(){return this.toArray()},t.Index=function(){this._fields=[],this._ref="id",this.pipeline=new t.Pipeline,this.documentStore=new t.Store,this.tokenStore=new t.TokenStore,this.corpusTokens=new t.SortedSet,this.eventEmitter=new t.EventEmitter,this._idfCache={},this.on("add","remove","update",function(){this._idfCache={}}.bind(this))},t.Index.prototype.on=function(){var t=Array.prototype.slice.call(arguments);return this.eventEmitter.addListener.apply(this.eventEmitter,t)},t.Index.prototype.off=function(t,e){return this.eventEmitter.removeListener(t,e)},t.Index.load=function(e){e.version!==t.version&&t.utils.warn("version mismatch: current "+t.version+" importing "+e.version);var n=new this;return n._fields=e.fields,n._ref=e.ref,n.documentStore=t.Store.load(e.documentStore),n.tokenStore=t.TokenStore.load(e.tokenStore),n.corpusTokens=t.SortedSet.load(e.corpusTokens),n.pipeline=t.Pipeline.load(e.pipeline),n},t.Index.prototype.field=function(t,e){var e=e||{},n={name:t,boost:e.boost||1};return this._fields.push(n),this},t.Index.prototype.ref=function(t){return this._ref=t,this},t.Index.prototype.add=function(e,n){var i={},o=new t.SortedSet,r=e[this._ref],n=void 0===n?!0:n;this._fields.forEach(function(n){var r=this.pipeline.run(t.tokenizer(e[n.name]));i[n.name]=r,t.SortedSet.prototype.add.apply(o,r)},this),this.documentStore.set(r,o),t.SortedSet.prototype.add.apply(this.corpusTokens,o.toArray());for(var s=0;s<o.length;s++){var a=o.elements[s],h=this._fields.reduce(function(t,e){var n=i[e.name].length;if(!n)return t;var o=i[e.name].filter(function(t){return t===a}).length;return t+o/n*e.boost},0);this.tokenStore.add(a,{ref:r,tf:h})}n&&this.eventEmitter.emit("add",e,this)},t.Index.prototype.remove=function(t,e){var n=t[this._ref],e=void 0===e?!0:e;if(this.documentStore.has(n)){var i=this.documentStore.get(n);this.documentStore.remove(n),i.forEach(function(t){this.tokenStore.remove(t,n)},this),e&&this.eventEmitter.emit("remove",t,this)}},t.Index.prototype.update=function(t,e){var e=void 0===e?!0:e;this.remove(t,!1),this.add(t,!1),e&&this.eventEmitter.emit("update",t,this)},t.Index.prototype.idf=function(t){var e="@"+t;if(Object.prototype.hasOwnProperty.call(this._idfCache,e))return this._idfCache[e];var n=this.tokenStore.count(t),i=1;return n>0&&(i=1+Math.log(this.documentStore.length/n)),this._idfCache[e]=i},t.Index.prototype.search=function(e){var n=this.pipeline.run(t.tokenizer(e)),i=new t.Vector,o=[],r=this._fields.reduce(function(t,e){return t+e.boost},0),s=n.some(function(t){return this.tokenStore.has(t)},this);if(!s)return[];n.forEach(function(e,n,s){var a=1/s.length*this._fields.length*r,h=this,l=this.tokenStore.expand(e).reduce(function(n,o){var r=h.corpusTokens.indexOf(o),s=h.idf(o),l=1,u=new t.SortedSet;if(o!==e){var c=Math.max(3,o.length-e.length);l=1/Math.log(c)}return r>-1&&i.insert(r,a*s*l),Object.keys(h.tokenStore.get(o)).forEach(function(t){u.add(t)}),n.union(u)},new t.SortedSet);o.push(l)},this);var a=o.reduce(function(t,e){return t.intersect(e)});return a.map(function(t){return{ref:t,score:i.similarity(this.documentVector(t))}},this).sort(function(t,e){return e.score-t.score})},t.Index.prototype.documentVector=function(e){for(var n=this.documentStore.get(e),i=n.length,o=new t.Vector,r=0;i>r;r++){var s=n.elements[r],a=this.tokenStore.get(s)[e].tf,h=this.idf(s);o.insert(this.corpusTokens.indexOf(s),a*h)}return o},t.Index.prototype.toJSON=function(){return{version:t.version,fields:this._fields,ref:this._ref,documentStore:this.documentStore.toJSON(),tokenStore:this.tokenStore.toJSON(),corpusTokens:this.corpusTokens.toJSON(),pipeline:this.pipeline.toJSON()}},t.Index.prototype.use=function(t){var e=Array.prototype.slice.call(arguments,1);e.unshift(this),t.apply(this,e)},t.Store=function(){this.store={},this.length=0},t.Store.load=function(e){var n=new this;return n.length=e.length,n.store=Object.keys(e.store).reduce(function(n,i){return n[i]=t.SortedSet.load(e.store[i]),n},{}),n},t.Store.prototype.set=function(t,e){this.has(t)||this.length++,this.store[t]=e},t.Store.prototype.get=function(t){return this.store[t]},t.Store.prototype.has=function(t){return t in this.store},t.Store.prototype.remove=function(t){this.has(t)&&(delete this.store[t],this.length--)},t.Store.prototype.toJSON=function(){return{store:this.store,length:this.length}},t.stemmer=function(){var t={ational:"ate",tional:"tion",enci:"ence",anci:"ance",izer:"ize",bli:"ble",alli:"al",entli:"ent",eli:"e",ousli:"ous",ization:"ize",ation:"ate",ator:"ate",alism:"al",iveness:"ive",fulness:"ful",ousness:"ous",aliti:"al",iviti:"ive",biliti:"ble",logi:"log"},e={icate:"ic",ative:"",alize:"al",iciti:"ic",ical:"ic",ful:"",ness:""},n="[^aeiou]",i="[aeiouy]",o=n+"[^aeiouy]*",r=i+"[aeiou]*",s="^("+o+")?"+r+o,a="^("+o+")?"+r+o+"("+r+")?$",h="^("+o+")?"+r+o+r+o,l="^("+o+")?"+i,u=new RegExp(s),c=new RegExp(h),f=new RegExp(a),d=new RegExp(l),p=/^(.+?)(ss|i)es$/,m=/^(.+?)([^s])s$/,v=/^(.+?)eed$/,y=/^(.+?)(ed|ing)$/,g=/.$/,S=/(at|bl|iz)$/,w=new RegExp("([^aeiouylsz])\\1$"),x=new RegExp("^"+o+i+"[^aeiouwxy]$"),k=/^(.+?[^aeiou])y$/,b=/^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/,E=/^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/,_=/^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/,F=/^(.+?)(s|t)(ion)$/,O=/^(.+?)e$/,P=/ll$/,N=new RegExp("^"+o+i+"[^aeiouwxy]$"),T=function(n){var i,o,r,s,a,h,l;if(n.length<3)return n;if(r=n.substr(0,1),"y"==r&&(n=r.toUpperCase()+n.substr(1)),s=p,a=m,s.test(n)?n=n.replace(s,"$1$2"):a.test(n)&&(n=n.replace(a,"$1$2")),s=v,a=y,s.test(n)){var T=s.exec(n);s=u,s.test(T[1])&&(s=g,n=n.replace(s,""))}else if(a.test(n)){var T=a.exec(n);i=T[1],a=d,a.test(i)&&(n=i,a=S,h=w,l=x,a.test(n)?n+="e":h.test(n)?(s=g,n=n.replace(s,"")):l.test(n)&&(n+="e"))}if(s=k,s.test(n)){var T=s.exec(n);i=T[1],n=i+"i"}if(s=b,s.test(n)){var T=s.exec(n);i=T[1],o=T[2],s=u,s.test(i)&&(n=i+t[o])}if(s=E,s.test(n)){var T=s.exec(n);i=T[1],o=T[2],s=u,s.test(i)&&(n=i+e[o])}if(s=_,a=F,s.test(n)){var T=s.exec(n);i=T[1],s=c,s.test(i)&&(n=i)}else if(a.test(n)){var T=a.exec(n);i=T[1]+T[2],a=c,a.test(i)&&(n=i)}if(s=O,s.test(n)){var T=s.exec(n);i=T[1],s=c,a=f,h=N,(s.test(i)||a.test(i)&&!h.test(i))&&(n=i)}return s=P,a=c,s.test(n)&&a.test(n)&&(s=g,n=n.replace(s,"")),"y"==r&&(n=r.toLowerCase()+n.substr(1)),n};return T}(),t.Pipeline.registerFunction(t.stemmer,"stemmer"),t.stopWordFilter=function(e){return e&&t.stopWordFilter.stopWords[e]!==e?e:void 0},t.stopWordFilter.stopWords={a:"a",able:"able",about:"about",across:"across",after:"after",all:"all",almost:"almost",also:"also",am:"am",among:"among",an:"an",and:"and",any:"any",are:"are",as:"as",at:"at",be:"be",because:"because",been:"been",but:"but",by:"by",can:"can",cannot:"cannot",could:"could",dear:"dear",did:"did","do":"do",does:"does",either:"either","else":"else",ever:"ever",every:"every","for":"for",from:"from",get:"get",got:"got",had:"had",has:"has",have:"have",he:"he",her:"her",hers:"hers",him:"him",his:"his",how:"how",however:"however",i:"i","if":"if","in":"in",into:"into",is:"is",it:"it",its:"its",just:"just",least:"least",let:"let",like:"like",likely:"likely",may:"may",me:"me",might:"might",most:"most",must:"must",my:"my",neither:"neither",no:"no",nor:"nor",not:"not",of:"of",off:"off",often:"often",on:"on",only:"only",or:"or",other:"other",our:"our",own:"own",rather:"rather",said:"said",say:"say",says:"says",she:"she",should:"should",since:"since",so:"so",some:"some",than:"than",that:"that",the:"the",their:"their",them:"them",then:"then",there:"there",these:"these",they:"they","this":"this",tis:"tis",to:"to",too:"too",twas:"twas",us:"us",wants:"wants",was:"was",we:"we",were:"were",what:"what",when:"when",where:"where",which:"which","while":"while",who:"who",whom:"whom",why:"why",will:"will","with":"with",would:"would",yet:"yet",you:"you",your:"your"},t.Pipeline.registerFunction(t.stopWordFilter,"stopWordFilter"),t.trimmer=function(t){var e=t.replace(/^\W+/,"").replace(/\W+$/,"");return""===e?void 0:e},t.Pipeline.registerFunction(t.trimmer,"trimmer"),t.TokenStore=function(){this.root={docs:{}},this.length=0},t.TokenStore.load=function(t){var e=new this;return e.root=t.root,e.length=t.length,e},t.TokenStore.prototype.add=function(t,e,n){var n=n||this.root,i=t[0],o=t.slice(1);return i in n||(n[i]={docs:{}}),0===o.length?(n[i].docs[e.ref]=e,void(this.length+=1)):this.add(o,e,n[i])},t.TokenStore.prototype.has=function(t){if(!t)return!1;for(var e=this.root,n=0;n<t.length;n++){if(!e[t[n]])return!1;e=e[t[n]]}return!0},t.TokenStore.prototype.getNode=function(t){if(!t)return{};for(var e=this.root,n=0;n<t.length;n++){if(!e[t[n]])return{};e=e[t[n]]}return e},t.TokenStore.prototype.get=function(t,e){return this.getNode(t,e).docs||{}},t.TokenStore.prototype.count=function(t,e){return Object.keys(this.get(t,e)).length},t.TokenStore.prototype.remove=function(t,e){if(t){for(var n=this.root,i=0;i<t.length;i++){if(!(t[i]in n))return;n=n[t[i]]}delete n.docs[e]}},t.TokenStore.prototype.expand=function(t,e){var n=this.getNode(t),i=n.docs||{},e=e||[];return Object.keys(i).length&&e.push(t),Object.keys(n).forEach(function(n){"docs"!==n&&e.concat(this.expand(t+n,e))},this),e},t.TokenStore.prototype.toJSON=function(){return{root:this.root,length:this.length}},function(t,e){"function"==typeof define&&define.amd?define(e):"object"==typeof exports?module.exports=e():t.lunr=e()}(this,function(){return t})}();
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-bookdown.js b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-bookdown.js
new file mode 100644
index 0000000..bd90080
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-bookdown.js
@@ -0,0 +1,220 @@
+gitbook.require(["gitbook", "lodash", "jQuery"], function(gitbook, _, $) {
+
+  var gs = gitbook.storage;
+
+  gitbook.events.bind("start", function(e, config) {
+
+    // add the Edit button (edit on Github)
+    var edit = config.edit;
+    if (edit && edit.link) gitbook.toolbar.createButton({
+      icon: 'fa fa-edit',
+      label: edit.text || 'Edit',
+      position: 'left',
+      onClick: function(e) {
+        e.preventDefault();
+        window.open(edit.link);
+      }
+    });
+
+    var down = config.download;
+    var normalizeDownload = function() {
+      if (!down || !(down instanceof Array) || down.length === 0) return;
+      if (down[0] instanceof Array) return down;
+      return $.map(down, function(file, i) {
+        return [[file, file.replace(/.*[.]/g, '').toUpperCase()]];
+      });
+    };
+    down = normalizeDownload(down);
+    if (down) if (down.length === 1 && /[.]pdf$/.test(down[0][0])) {
+      gitbook.toolbar.createButton({
+        icon: 'fa fa-file-pdf-o',
+        label: down[0][1],
+        position: 'left',
+        onClick: function(e) {
+          e.preventDefault();
+          window.open(down[0][0]);
+        }
+      });
+    } else {
+      gitbook.toolbar.createButton({
+        icon: 'fa fa-download',
+        label: 'Download',
+        position: 'left',
+        dropdown: $.map(down, function(item, i) {
+          return {
+            text: item[1],
+            onClick: function(e) {
+              e.preventDefault();
+              window.open(item[0]);
+            }
+          };
+        })
+      });
+    }
+
+    // highlight the current section in TOC
+    var href = window.location.pathname;
+    href = href.substr(href.lastIndexOf('/') + 1);
+    if (href === '') href = 'index.html';
+    var li = $('a[href^="' + href + location.hash + '"]').parent('li.chapter').first();
+    var summary = $('ul.summary'), chaps = summary.find('li.chapter');
+    if (li.length === 0) li = chaps.first();
+    li.addClass('active');
+    chaps.on('click', function(e) {
+      chaps.removeClass('active');
+      $(this).addClass('active');
+      gs.set('tocScrollTop', summary.scrollTop());
+    });
+
+    var toc = config.toc;
+    // collapse TOC items that are not for the current chapter
+    if (toc && toc.collapse) (function() {
+      var type = toc.collapse;
+      if (type === 'none') return;
+      if (type !== 'section' && type !== 'subsection') return;
+      // sections under chapters
+      var toc_sub = summary.children('li[data-level]').children('ul');
+      if (type === 'section') {
+        toc_sub.hide()
+          .parent().has(li).children('ul').show();
+      } else {
+        toc_sub.children('li').children('ul').hide()
+          .parent().has(li).children('ul').show();
+      }
+      li.children('ul').show();
+      var toc_sub2 = toc_sub.children('li');
+      if (type === 'section') toc_sub2.children('ul').hide();
+      summary.children('li[data-level]').find('a')
+        .on('click.bookdown', function(e) {
+          if (href === $(this).attr('href').replace(/#.*/, ''))
+            $(this).parent('li').children('ul').toggle();
+        });
+    })();
+
+    // add tooltips to the <a>'s that are truncated
+    $('a').each(function(i, el) {
+      if (el.offsetWidth >= el.scrollWidth) return;
+      if (typeof el.title === 'undefined') return;
+      el.title = el.text;
+    });
+
+    // restore TOC scroll position
+    var pos = gs.get('tocScrollTop');
+    if (typeof pos !== 'undefined') summary.scrollTop(pos);
+
+    // highlight the TOC item that has same text as the heading in view as scrolling
+    if (toc && toc.scroll_highlight !== false) (function() {
+      // scroll the current TOC item into viewport
+      var ht = $(window).height(), rect = li[0].getBoundingClientRect();
+      if (rect.top >= ht || rect.top <= 0 || rect.bottom <= 0) {
+        summary.scrollTop(li[0].offsetTop);
+      }
+      // current chapter TOC items
+      var items = $('a[href^="' + href + '"]').parent('li.chapter'),
+          m = items.length;
+      if (m === 0) {
+        items = summary.find('li.chapter');
+        m = items.length;
+      }
+      if (m === 0) return;
+      // all section titles on current page
+      var hs = bookInner.find('.page-inner').find('h1,h2,h3'), n = hs.length,
+          ts = hs.map(function(i, el) { return $(el).text(); });
+      if (n === 0) return;
+      var scrollHandler = function(e) {
+        var ht = $(window).height();
+        clearTimeout($.data(this, 'scrollTimer'));
+        $.data(this, 'scrollTimer', setTimeout(function() {
+          // find the first visible title in the viewport
+          for (var i = 0; i < n; i++) {
+            var rect = hs[i].getBoundingClientRect();
+            if (rect.top >= 0 && rect.bottom <= ht) break;
+          }
+          if (i === n) return;
+          items.removeClass('active');
+          for (var j = 0; j < m; j++) {
+            if (items.eq(j).children('a').first().text() === ts[i]) break;
+          }
+          if (j === m) j = 0;  // highlight the chapter title
+          // search bottom-up for a visible TOC item to highlight; if an item is
+          // hidden, we check if its parent is visible, and so on
+          while (j > 0 && items.eq(j).is(':hidden')) j--;
+          items.eq(j).addClass('active');
+        }, 250));
+      };
+      bookInner.on('scroll.bookdown', scrollHandler);
+      bookBody.on('scroll.bookdown', scrollHandler);
+    })();
+
+    // do not refresh the page if the TOC item points to the current page
+    $('a[href="' + href + '"]').parent('li.chapter').children('a')
+      .on('click', function(e) {
+        bookInner.scrollTop(0);
+        bookBody.scrollTop(0);
+        return false;
+      });
+
+    var toolbar = config.toolbar;
+    if (!toolbar || toolbar.position !== 'static') {
+      var bookHeader = $('.book-header');
+      bookBody.addClass('fixed');
+      bookHeader.addClass('fixed')
+      .css('background-color', bookBody.css('background-color'))
+      .on('click.bookdown', function(e) {
+        // the theme may have changed after user clicks the theme button
+        bookHeader.css('background-color', bookBody.css('background-color'));
+      });
+    }
+
+  });
+
+  gitbook.events.bind("page.change", function(e) {
+    // store TOC scroll position
+    var summary = $('ul.summary');
+    gs.set('tocScrollTop', summary.scrollTop());
+  });
+
+  var bookBody = $('.book-body'), bookInner = bookBody.find('.body-inner');
+  var chapterTitle = function() {
+    return bookInner.find('.page-inner').find('h1,h2').first().text();
+  };
+  var bookTitle = function() {
+    return bookInner.find('.book-header > h1').first().text();
+  };
+  var saveScrollPos = function(e) {
+    // save scroll position before page is reloaded
+    gs.set('bodyScrollTop', {
+      body: bookBody.scrollTop(),
+      inner: bookInner.scrollTop(),
+      focused: document.hasFocus(),
+      title: chapterTitle()
+    });
+  };
+  $(document).on('servr:reload', saveScrollPos);
+
+  // check if the page is loaded in an iframe (e.g. the RStudio preview window)
+  var inIFrame = function() {
+    var inIframe = true;
+    try { inIframe = window.self !== window.top; } catch (e) {}
+    return inIframe;
+  };
+  $(window).on('blur unload', function(e) {
+    if (inIFrame()) saveScrollPos(e);
+    gs.set('bookTitle', bookTitle());
+  });
+
+  $(function(e) {
+    if (gs.get('bookTitle', '') !== bookTitle()) localStorage.clear();
+    var pos = gs.get('bodyScrollTop');
+    if (pos) {
+      if (pos.title === chapterTitle()) {
+        if (pos.body !== 0) bookBody.scrollTop(pos.body);
+        if (pos.inner !== 0) bookInner.scrollTop(pos.inner);
+      }
+      if (pos.focused) bookInner.find('.page-wrapper').focus();
+    }
+    // clear book body scroll position
+    gs.remove('bodyScrollTop');
+  });
+
+});
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-fontsettings.js b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-fontsettings.js
new file mode 100644
index 0000000..b39eca2
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-fontsettings.js
@@ -0,0 +1,151 @@
+gitbook.require(["gitbook", "lodash", "jQuery"], function(gitbook, _, $) {
+    var fontState;
+
+    var THEMES = {
+        "white": 0,
+        "sepia": 1,
+        "night": 2
+    };
+
+    var FAMILY = {
+        "serif": 0,
+        "sans": 1
+    };
+
+    // Save current font settings
+    function saveFontSettings() {
+        gitbook.storage.set("fontState", fontState);
+        update();
+    }
+
+    // Increase font size
+    function enlargeFontSize(e) {
+        e.preventDefault();
+        if (fontState.size >= 4) return;
+
+        fontState.size++;
+        saveFontSettings();
+    };
+
+    // Decrease font size
+    function reduceFontSize(e) {
+        e.preventDefault();
+        if (fontState.size <= 0) return;
+
+        fontState.size--;
+        saveFontSettings();
+    };
+
+    // Change font family
+    function changeFontFamily(index, e) {
+        e.preventDefault();
+
+        fontState.family = index;
+        saveFontSettings();
+    };
+
+    // Change type of color
+    function changeColorTheme(index, e) {
+        e.preventDefault();
+
+        var $book = $(".book");
+
+        if (fontState.theme !== 0)
+            $book.removeClass("color-theme-"+fontState.theme);
+
+        fontState.theme = index;
+        if (fontState.theme !== 0)
+            $book.addClass("color-theme-"+fontState.theme);
+
+        saveFontSettings();
+    };
+
+    function update() {
+        var $book = gitbook.state.$book;
+
+        $(".font-settings .font-family-list li").removeClass("active");
+        $(".font-settings .font-family-list li:nth-child("+(fontState.family+1)+")").addClass("active");
+
+        $book[0].className = $book[0].className.replace(/\bfont-\S+/g, '');
+        $book.addClass("font-size-"+fontState.size);
+        $book.addClass("font-family-"+fontState.family);
+
+        if(fontState.theme !== 0) {
+            $book[0].className = $book[0].className.replace(/\bcolor-theme-\S+/g, '');
+            $book.addClass("color-theme-"+fontState.theme);
+        }
+    };
+
+    function init(config) {
+        var $bookBody, $book;
+
+        //Find DOM elements.
+        $book = gitbook.state.$book;
+        $bookBody = $book.find(".book-body");
+
+        // Instantiate font state object
+        fontState = gitbook.storage.get("fontState", {
+            size: config.size || 2,
+            family: FAMILY[config.family || "sans"],
+            theme: THEMES[config.theme || "white"]
+        });
+
+        update();
+    };
+
+
+    gitbook.events.bind("start", function(e, config) {
+        var opts = config.fontsettings;
+
+        // Create buttons in toolbar
+        gitbook.toolbar.createButton({
+            icon: 'fa fa-font',
+            label: 'Font Settings',
+            className: 'font-settings',
+            dropdown: [
+                [
+                    {
+                        text: 'A',
+                        className: 'font-reduce',
+                        onClick: reduceFontSize
+                    },
+                    {
+                        text: 'A',
+                        className: 'font-enlarge',
+                        onClick: enlargeFontSize
+                    }
+                ],
+                [
+                    {
+                        text: 'Serif',
+                        onClick: _.partial(changeFontFamily, 0)
+                    },
+                    {
+                        text: 'Sans',
+                        onClick: _.partial(changeFontFamily, 1)
+                    }
+                ],
+                [
+                    {
+                        text: 'White',
+                        onClick: _.partial(changeColorTheme, 0)
+                    },
+                    {
+                        text: 'Sepia',
+                        onClick: _.partial(changeColorTheme, 1)
+                    },
+                    {
+                        text: 'Night',
+                        onClick: _.partial(changeColorTheme, 2)
+                    }
+                ]
+            ]
+        });
+
+
+        // Init current settings
+        init(opts);
+    });
+});
+
+
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-search.js b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-search.js
new file mode 100644
index 0000000..f8bd5af
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-search.js
@@ -0,0 +1,212 @@
+gitbook.require(["gitbook", "lodash", "jQuery"], function(gitbook, _, $) {
+    var index = null;
+    var $searchInput, $searchForm;
+    var $highlighted, hi = 0, hiOpts = { className: 'search-highlight' };
+    var collapse = false;
+
+    // Use a specific index
+    function loadIndex(data) {
+        // [Yihui] In bookdown, I use a character matrix to store the chapter
+        // content, and the index is dynamically built on the client side.
+        // Gitbook prebuilds the index data instead: https://github.com/GitbookIO/plugin-search
+        // We can certainly do that via R packages V8 and jsonlite, but let's
+        // see how slow it really is before improving it. On the other hand,
+        // lunr cannot handle non-English text very well, e.g. the default
+        // tokenizer cannot deal with Chinese text, so we may want to replace
+        // lunr with a dumb simple text matching approach.
+        index = lunr(function () {
+          this.ref('url');
+          this.field('title', { boost: 10 });
+          this.field('body');
+        });
+        data.map(function(item) {
+          index.add({
+            url: item[0],
+            title: item[1],
+            body: item[2]
+          });
+        });
+    }
+
+    // Fetch the search index
+    function fetchIndex() {
+        return $.getJSON(gitbook.state.basePath+"/search_index.json")
+                .then(loadIndex);  // [Yihui] we need to use this object later
+    }
+
+    // Search for a term and return results
+    function search(q) {
+        if (!index) return;
+
+        var results = _.chain(index.search(q))
+        .map(function(result) {
+            var parts = result.ref.split("#");
+            return {
+                path: parts[0],
+                hash: parts[1]
+            };
+        })
+        .value();
+
+        // [Yihui] Highlight the search keyword on current page
+        hi = 0;
+        $highlighted = results.length === 0 ? undefined : $('.page-inner')
+          .unhighlight(hiOpts).highlight(q, hiOpts).find('span.search-highlight');
+        scrollToHighlighted();
+        toggleTOC(results.length > 0);
+
+        return results;
+    }
+
+    // [Yihui] Scroll the chapter body to the i-th highlighted string
+    function scrollToHighlighted() {
+      if (!$highlighted) return;
+      var n = $highlighted.length;
+      if (n === 0) return;
+      var $p = $highlighted.eq(hi), p = $p[0], rect = p.getBoundingClientRect();
+      if (rect.top < 0 || rect.bottom > $(window).height()) {
+        ($(window).width() >= 1240 ? $('.body-inner') : $('.book-body'))
+          .scrollTop(p.offsetTop - 100);
+      }
+      $highlighted.css('background-color', '');
+      // an orange background color on the current item and removed later
+      $p.css('background-color', 'orange');
+      setTimeout(function() {
+        $p.css('background-color', '');
+      }, 2000);
+    }
+
+    // [Yihui] Expand/collapse TOC
+    function toggleTOC(show) {
+      if (!collapse) return;
+      var toc_sub = $('ul.summary').children('li[data-level]').children('ul');
+      if (show) return toc_sub.show();
+      var href = window.location.pathname;
+      href = href.substr(href.lastIndexOf('/') + 1);
+      if (href === '') href = 'index.html';
+      var li = $('a[href^="' + href + location.hash + '"]').parent('li.chapter').first();
+      toc_sub.hide().parent().has(li).children('ul').show();
+      li.children('ul').show();
+    }
+
+    // Create search form
+    function createForm(value) {
+        if ($searchForm) $searchForm.remove();
+        if ($searchInput) $searchInput.remove();
+
+        $searchForm = $('<div>', {
+            'class': 'book-search',
+            'role': 'search'
+        });
+
+        $searchInput = $('<input>', {
+            'type': 'search',
+            'class': 'form-control',
+            'val': value,
+            'placeholder': 'Type to search'
+        });
+
+        $searchInput.appendTo($searchForm);
+        $searchForm.prependTo(gitbook.state.$book.find('.book-summary'));
+    }
+
+    // Return true if search is open
+    function isSearchOpen() {
+        return gitbook.state.$book.hasClass("with-search");
+    }
+
+    // Toggle the search
+    function toggleSearch(_state) {
+        if (isSearchOpen() === _state) return;
+        if (!$searchInput) return;
+
+        gitbook.state.$book.toggleClass("with-search", _state);
+
+        // If search bar is open: focus input
+        if (isSearchOpen()) {
+            gitbook.sidebar.toggle(true);
+            $searchInput.focus();
+        } else {
+            $searchInput.blur();
+            $searchInput.val("");
+            gitbook.storage.remove("keyword");
+            gitbook.sidebar.filter(null);
+            $('.page-inner').unhighlight(hiOpts);
+            toggleTOC(false);
+        }
+    }
+
+    // Recover current search when page changed
+    function recoverSearch() {
+        var keyword = gitbook.storage.get("keyword", "");
+
+        createForm(keyword);
+
+        if (keyword.length > 0) {
+            if(!isSearchOpen()) {
+                toggleSearch(true); // [Yihui] open the search box
+            }
+            gitbook.sidebar.filter(_.pluck(search(keyword), "path"));
+        }
+    }
+
+
+    gitbook.events.bind("start", function(e, config) {
+        // [Yihui] disable search
+        if (config.search === false) return;
+        collapse = !config.toc || config.toc.collapse === 'section' ||
+          config.toc.collapse === 'subsection';
+
+        // Pre-fetch search index and create the form
+        fetchIndex()
+        // [Yihui] recover search after the page is loaded
+        .then(recoverSearch);
+
+
+        // Type in search bar
+        $(document).on("keyup", ".book-search input", function(e) {
+            var key = (e.keyCode ? e.keyCode : e.which);
+            // [Yihui] Escape -> close search box; Up/Down: previous/next highlighted
+            if (key == 27) {
+                e.preventDefault();
+                toggleSearch(false);
+            } else if (key == 38) {
+              if (hi <= 0 && $highlighted) hi = $highlighted.length;
+              hi--;
+              scrollToHighlighted();
+            } else if (key == 40) {
+              hi++;
+              if ($highlighted && hi >= $highlighted.length) hi = 0;
+              scrollToHighlighted();
+            }
+        }).on("input", ".book-search input", function(e) {
+            var q = $(this).val().trim();
+            if (q.length === 0) {
+                gitbook.sidebar.filter(null);
+                gitbook.storage.remove("keyword");
+                $('.page-inner').unhighlight(hiOpts);
+                toggleTOC(false);
+            } else {
+                var results = search(q);
+                gitbook.sidebar.filter(
+                    _.pluck(results, "path")
+                );
+                gitbook.storage.set("keyword", q);
+            }
+        });
+
+        // Create the toggle search button
+        gitbook.toolbar.createButton({
+            icon: 'fa fa-search',
+            label: 'Search',
+            position: 'left',
+            onClick: toggleSearch
+        });
+
+        // Bind keyboard to toggle search
+        gitbook.keyboard.bind(['f'], toggleSearch);
+    });
+
+    // [Yihui] do not try to recover search; always start fresh
+    // gitbook.events.bind("page.change", recoverSearch);
+});
diff --git a/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-sharing.js b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-sharing.js
new file mode 100644
index 0000000..afa2148
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/gitbook-2.6.7/js/plugin-sharing.js
@@ -0,0 +1,112 @@
+gitbook.require(["gitbook", "lodash", "jQuery"], function(gitbook, _, $) {
+    var SITES = {
+        'github': {
+            'label': 'Github',
+            'icon': 'fa fa-github',
+            'onClick': function(e) {
+                e.preventDefault();
+                var repo = $('meta[name="github-repo"]').attr('content');
+                if (typeof repo === 'undefined') throw("Github repo not defined");
+                window.open("https://github.com/"+repo);
+            }
+        },
+        'facebook': {
+            'label': 'Facebook',
+            'icon': 'fa fa-facebook',
+            'onClick': function(e) {
+                e.preventDefault();
+                window.open("http://www.facebook.com/sharer/sharer.php?s=100&p[url]="+encodeURIComponent(location.href));
+            }
+        },
+        'twitter': {
+            'label': 'Twitter',
+            'icon': 'fa fa-twitter',
+            'onClick': function(e) {
+                e.preventDefault();
+                window.open("http://twitter.com/home?status="+encodeURIComponent(document.title+" "+location.href));
+            }
+        },
+        'google': {
+            'label': 'Google+',
+            'icon': 'fa fa-google-plus',
+            'onClick': function(e) {
+                e.preventDefault();
+                window.open("https://plus.google.com/share?url="+encodeURIComponent(location.href));
+            }
+        },
+        'linkedin': {
+            'label': 'LinkedIn',
+            'icon': 'fa fa-linkedin',
+            'onClick': function(e) {
+                e.preventDefault();
+                window.open("https://www.linkedin.com/shareArticle?mini=true&url="+encodeURIComponent(location.href)+"&title="+encodeURIComponent(document.title));
+            }
+        },
+        'weibo': {
+            'label': 'Weibo',
+            'icon': 'fa fa-weibo',
+            'onClick': function(e) {
+                e.preventDefault();
+                window.open("http://service.weibo.com/share/share.php?content=utf-8&url="+encodeURIComponent(location.href)+"&title="+encodeURIComponent(document.title));
+            }
+        },
+        'instapaper': {
+            'label': 'Instapaper',
+            'icon': 'fa fa-instapaper',
+            'onClick': function(e) {
+                e.preventDefault();
+                window.open("http://www.instapaper.com/text?u="+encodeURIComponent(location.href));
+            }
+        },
+        'vk': {
+            'label': 'VK',
+            'icon': 'fa fa-vk',
+            'onClick': function(e) {
+                e.preventDefault();
+                window.open("http://vkontakte.ru/share.php?url="+encodeURIComponent(location.href));
+            }
+        }
+    };
+
+
+
+    gitbook.events.bind("start", function(e, config) {
+        var opts = config.sharing;
+        if (!opts) return;
+
+        // Create dropdown menu
+        var menu = _.chain(opts.all)
+            .map(function(id) {
+                var site = SITES[id];
+
+                return {
+                    text: site.label,
+                    onClick: site.onClick
+                };
+            })
+            .compact()
+            .value();
+
+        // Create main button with dropdown
+        if (menu.length > 0) {
+            gitbook.toolbar.createButton({
+                icon: 'fa fa-share-alt',
+                label: 'Share',
+                position: 'right',
+                dropdown: [menu]
+            });
+        }
+
+        // Direct actions to share
+        _.each(SITES, function(site, sideId) {
+            if (!opts[sideId]) return;
+
+            gitbook.toolbar.createButton({
+                icon: site.icon,
+                label: site.text,
+                position: 'right',
+                onClick: site.onClick
+            });
+        });
+    });
+});
diff --git a/docs/bookdown_example/_book/libs/jquery-2.2.3/jquery.min.js b/docs/bookdown_example/_book/libs/jquery-2.2.3/jquery.min.js
new file mode 100644
index 0000000..b8c4187
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/jquery-2.2.3/jquery.min.js
@@ -0,0 +1,4 @@
+/*! jQuery v2.2.3 | (c) jQuery Foundation | jquery.org/license */
+!function(a,b){"object"==typeof module&&"object"==typeof module.exports?module.exports=a.document?b(a,!0):function(a){if(!a.document)throw new Error("jQuery requires a window with a document");return b(a)}:b(a)}("undefined"!=typeof window?window:this,function(a,b){var c=[],d=a.document,e=c.slice,f=c.concat,g=c.push,h=c.indexOf,i={},j=i.toString,k=i.hasOwnProperty,l={},m="2.2.3",n=function(a,b){return new n.fn.init(a,b)},o=/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,p=/^-ms-/,q=/-([\da-z])/gi,r=function(a,b){return b.toUpperCase()};n.fn=n.prototype={jquery:m,constructor:n,selector:"",length:0,toArray:function(){return e.call(this)},get:function(a){return null!=a?0>a?this[a+this.length]:this[a]:e.call(this)},pushStack:function(a){var b=n.merge(this.constructor(),a);return b.prevObject=this,b.context=this.context,b},each:function(a){return n.each(this,a)},map:function(a){return this.pushStack(n.map(this,function(b,c){return a.call(b,c,b)}))},slice:function(){return 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diff --git a/docs/bookdown_example/_book/libs/kePrint-0.0.1/kePrint.js b/docs/bookdown_example/_book/libs/kePrint-0.0.1/kePrint.js
new file mode 100644
index 0000000..4f9728d
--- /dev/null
+++ b/docs/bookdown_example/_book/libs/kePrint-0.0.1/kePrint.js
@@ -0,0 +1,4 @@
+$(document).ready(function(){
+    $('[data-toggle="tooltip"]').tooltip();
+    $('[data-toggle="popover"]').popover();
+});
diff --git a/docs/bookdown_example/_book/search_index.json b/docs/bookdown_example/_book/search_index.json
new file mode 100644
index 0000000..e4f0e72
--- /dev/null
+++ b/docs/bookdown_example/_book/search_index.json
@@ -0,0 +1,5 @@
+[
+["index.html", "Using kableExtra in Bookdown Projects Chapter 1 Introduction", " Using kableExtra in Bookdown Projects Hao Zhu 2018-10-03 Chapter 1 Introduction If you have tried to use kableExtra in a bookdown project with mutltiple formats, you may have experienced some problems. For example, you might not be able to render HTML and PDF tables at the same time using the same piece of code. At the same time, you might start to wonder if it’s possible to create bootstrap style tables in gitbook. I will try to address these issues using this example. This book is hosted at https://github.com/haozhu233/kableExtra/tree/master/docs. You can find the source code for this project at https://github.com/haozhu233/kableExtra/tree/master/docs. "],
+["cross-format-tables-in-bookdown.html", "Chapter 2 Cross-format Tables in Bookdown 2.1 Use the “K-M” approach instead of “M-K” 2.2 Prepare Your Tables for Both Formats", " Chapter 2 Cross-format Tables in Bookdown Note that if kableExtra 0.9.0 doesn’t support the EPUB format. If you need to output tables in .epub, please upgrade to the dev version or version 1.0 on CRAN once it’s released. 2.1 Use the “K-M” approach instead of “M-K” Please read this chapter about the “K-M”/“M-K” approaches in bookdown: https://bookdown.org/yihui/bookdown/new-session.html To generate cross-format tables with kableExtra in a multi-format bookdown project, you will have to use the “M-K” approach by setting new_session: true in _bookdown.yml. Somehow the “M-K” approach, which merges chapters to a big Rmd and then renders, shares the global environment across formats. For now, I’m not sure if this is a bug or intended behavior. It might be fixable in the future but please don’t count on that. By setting new_session: true, we force R to use a new session for every chapter for different formats. In this way, tables are generated differently in different formats. Note that the “M-K” approach is slower than the “K-M” approach. At the same time, packages and data are not shared accross chapter. # Example _bookdown.yml book_filename: &quot;bookdown_example&quot; delete_merged_file: true new_session: true language: ui: chapter_name: &quot;Chapter &quot; 2.2 Prepare Your Tables for Both Formats In most cases, functions in kable and kableExtra use the same API to accomplish the same styling task in HTML and LaTeX. However, you also need some format specific settings so your tables will look good in both formats. Some common items here include the booktabs and longtable settings in kable and the bootstrap_options and latex_options in kable_styling. Here is an example for a table that will work in both HTML and LaTeX. library(kableExtra) mtcars[1:5, 1:5] %&gt;% kable(booktabs = T) %&gt;% kable_styling( latex_options = c(&quot;striped&quot;), full_width = F ) %&gt;% column_spec(1, bold = T) %&gt;% add_header_above(c(&quot; &quot;, &quot;Group A&quot; = 2, &quot;Group B&quot; = 3)) Group A Group B mpg cyl disp hp drat Mazda RX4 21.0 6 160 110 3.90 Mazda RX4 Wag 21.0 6 160 110 3.90 Datsun 710 22.8 4 108 93 3.85 Hornet 4 Drive 21.4 6 258 110 3.08 Hornet Sportabout 18.7 8 360 175 3.15 "],
+["use-bootstrap-tables-in-gitbooks-epub.html", "Chapter 3 Use Bootstrap Tables in gitbooks &amp; epub 3.1 Gitbook 3.2 Epub", " Chapter 3 Use Bootstrap Tables in gitbooks &amp; epub 3.1 Gitbook Most of kableExtra tricks will work in bookdown except those requires bootstrap. By default, rmarkdown won’t load bootstrap for you on gitbook as it’s not necesary. In kableExtra, I used the bootstrap 3.3.7 customization tool and made a customized css copy. You can load it by setting options(kableExtra.html.bsTable = T). library(kableExtra) options(kableExtra.html.bsTable = T) mtcars[1:5, 1:5] %&gt;% kable(booktabs = T) %&gt;% kable_styling( bootstrap_options = c(&quot;striped&quot;,&quot;hover&quot;, &quot;bordered&quot;), latex_options = c(&quot;striped&quot;), full_width = F ) %&gt;% column_spec(1, color = &quot;red&quot;) %&gt;% add_header_above(c(&quot; &quot;, &quot;Group A&quot; = 2, &quot;Group B&quot; = 3)) Group A Group B mpg cyl disp hp drat Mazda RX4 21.0 6 160 110 3.90 Mazda RX4 Wag 21.0 6 160 110 3.90 Datsun 710 22.8 4 108 93 3.85 Hornet 4 Drive 21.4 6 258 110 3.08 Hornet Sportabout 18.7 8 360 175 3.15 However, very unfortunately, as we can see, the hover part is not working and the table still looks different from a regular bootstrap table. The reason is that gitbook defines its own way to style tables and some of its rules are conflicting with the one defined in bootstrap. For css, it’s like once you load something, it’s impossible to really unload it. As a result, unless there are some changes in bookdown (for example, we can replace the gitbook table part with bootstrap tables), there is nothing we can do here. 3.2 Epub Right now, it’s impossible to load addition CSS through HTML dependency (due to a setting in rmarkdown). I will file an issue in rmarkdown and see if this is something that can be changed. In the mean time, to use bootstrap tables in Epub, you will have to manually load this stylesheet by putting it to a CSS file (such as “style.css”) and load it in _output.yml. For example, bookdown::epub_book: stylesheet: style.css "]
+]
diff --git a/docs/bookdown_example/_book/style.css b/docs/bookdown_example/_book/style.css
new file mode 100644
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--- /dev/null
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+ * Config saved to config.json and <none>
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+ * Bootstrap v3.3.7 (http://getbootstrap.com)
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diff --git a/docs/bookdown_example/_book/use-bootstrap-tables-in-gitbooks-epub.html b/docs/bookdown_example/_book/use-bootstrap-tables-in-gitbooks-epub.html
new file mode 100644
index 0000000..ea4a602
--- /dev/null
+++ b/docs/bookdown_example/_book/use-bootstrap-tables-in-gitbooks-epub.html
@@ -0,0 +1,373 @@
+<!DOCTYPE html>
+<html >
+
+<head>
+
+  <meta charset="UTF-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <title>Using kableExtra in Bookdown Projects</title>
+  <meta name="description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects.">
+  <meta name="generator" content="bookdown  and GitBook 2.6.7">
+
+  <meta property="og:title" content="Using kableExtra in Bookdown Projects" />
+  <meta property="og:type" content="book" />
+  
+  
+  <meta property="og:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
+  
+
+  <meta name="twitter:card" content="summary" />
+  <meta name="twitter:title" content="Using kableExtra in Bookdown Projects" />
+  
+  <meta name="twitter:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
+  
+
+<meta name="author" content="Hao Zhu">
+
+
+<meta name="date" content="2018-10-03">
+
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black">
+  
+  
+<link rel="prev" href="cross-format-tables-in-bookdown.html">
+
+<script src="libs/jquery-2.2.3/jquery.min.js"></script>
+<link href="libs/gitbook-2.6.7/css/style.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-bookdown.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-highlight.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-search.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-fontsettings.css" rel="stylesheet" />
+
+
+
+
+
+
+
+<script src="libs/kePrint-0.0.1/kePrint.js"></script>
+<link href="libs/bsTable-3.3.7/bootstrapTable.min.css" rel="stylesheet" />
+
+
+<style type="text/css">
+a.sourceLine { display: inline-block; line-height: 1.25; }
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+  { position: relative; }
+pre.numberSource a.sourceLine:empty
+  { position: absolute; }
+pre.numberSource a.sourceLine::before
+  { content: attr(data-line-number);
+    position: absolute; left: -5em; text-align: right; vertical-align: baseline;
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+pre.numberSource { margin-left: 3em; border-left: 1px solid #aaaaaa;  padding-left: 4px; }
+div.sourceCode
+  {  }
+@media screen {
+a.sourceLine::before { text-decoration: underline; }
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+code span.al { color: #ff0000; font-weight: bold; } /* Alert */
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+</style>
+
+</head>
+
+<body>
+
+
+
+  <div class="book without-animation with-summary font-size-2 font-family-1" data-basepath=".">
+
+    <div class="book-summary">
+      <nav role="navigation">
+
+<ul class="summary">
+<li class="chapter" data-level="1" data-path="index.html"><a href="index.html"><i class="fa fa-check"></i><b>1</b> Introduction</a></li>
+<li class="chapter" data-level="2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html"><i class="fa fa-check"></i><b>2</b> Cross-format Tables in Bookdown</a><ul>
+<li class="chapter" data-level="2.1" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#use-the-k-m-approach-instead-of-m-k"><i class="fa fa-check"></i><b>2.1</b> Use the “K-M” approach instead of “M-K”</a></li>
+<li class="chapter" data-level="2.2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#prepare-your-tables-for-both-formats"><i class="fa fa-check"></i><b>2.2</b> Prepare Your Tables for Both Formats</a></li>
+</ul></li>
+<li class="chapter" data-level="3" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html"><i class="fa fa-check"></i><b>3</b> Use Bootstrap Tables in gitbooks &amp; epub</a><ul>
+<li class="chapter" data-level="3.1" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html#gitbook"><i class="fa fa-check"></i><b>3.1</b> Gitbook</a></li>
+<li class="chapter" data-level="3.2" data-path="use-bootstrap-tables-in-gitbooks-epub.html"><a href="use-bootstrap-tables-in-gitbooks-epub.html#epub"><i class="fa fa-check"></i><b>3.2</b> Epub</a></li>
+</ul></li>
+</ul>
+
+      </nav>
+    </div>
+
+    <div class="book-body">
+      <div class="body-inner">
+        <div class="book-header" role="navigation">
+          <h1>
+            <i class="fa fa-circle-o-notch fa-spin"></i><a href="./">Using kableExtra in Bookdown Projects</a>
+          </h1>
+        </div>
+
+        <div class="page-wrapper" tabindex="-1" role="main">
+          <div class="page-inner">
+
+            <section class="normal" id="section-">
+<div id="use-bootstrap-tables-in-gitbooks-epub" class="section level1">
+<h1><span class="header-section-number">Chapter 3</span> Use Bootstrap Tables in gitbooks &amp; epub</h1>
+<div id="gitbook" class="section level2">
+<h2><span class="header-section-number">3.1</span> Gitbook</h2>
+<p>Most of <code>kableExtra</code> tricks will work in <code>bookdown</code> except those requires <a href="http://getbootstrap.com/"><code>bootstrap</code></a>. By default, <code>rmarkdown</code> won’t load <code>bootstrap</code> for you on gitbook as it’s not necesary. In <code>kableExtra</code>, I used the <a href="https://getbootstrap.com/docs/3.3/customize/">bootstrap 3.3.7 customization tool</a> and made a customized css copy. You can load it by setting <code>options(kableExtra.html.bsTable = T)</code>.</p>
+<pre class="sourceCode r"><code class="sourceCode r"><span class="kw">library</span>(kableExtra)
+<span class="kw">options</span>(<span class="dt">kableExtra.html.bsTable =</span> T)
+
+mtcars[<span class="dv">1</span><span class="op">:</span><span class="dv">5</span>, <span class="dv">1</span><span class="op">:</span><span class="dv">5</span>] <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">kable</span>(<span class="dt">booktabs =</span> T) <span class="op">%&gt;%</span><span class="st"> </span>
+<span class="st">  </span><span class="kw">kable_styling</span>(
+    <span class="dt">bootstrap_options =</span> <span class="kw">c</span>(<span class="st">&quot;striped&quot;</span>,<span class="st">&quot;hover&quot;</span>, <span class="st">&quot;bordered&quot;</span>),
+    <span class="dt">latex_options =</span> <span class="kw">c</span>(<span class="st">&quot;striped&quot;</span>),
+    <span class="dt">full_width =</span> F
+  ) <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">column_spec</span>(<span class="dv">1</span>, <span class="dt">color =</span> <span class="st">&quot;red&quot;</span>) <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">add_header_above</span>(<span class="kw">c</span>(<span class="st">&quot; &quot;</span>, <span class="st">&quot;Group A&quot;</span> =<span class="st"> </span><span class="dv">2</span>, <span class="st">&quot;Group B&quot;</span> =<span class="st"> </span><span class="dv">3</span>))</code></pre>
+<table class="table table-striped table-hover table-bordered" style="width: auto !important; margin-left: auto; margin-right: auto;">
+<thead>
+<tr>
+<th style="border-bottom:hidden" colspan="1">
+</th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="2">
+<div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">
+Group A
+</div>
+</th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="3">
+<div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">
+Group B
+</div>
+</th>
+</tr>
+<tr>
+<th style="text-align:left;">
+</th>
+<th style="text-align:right;">
+mpg
+</th>
+<th style="text-align:right;">
+cyl
+</th>
+<th style="text-align:right;">
+disp
+</th>
+<th style="text-align:right;">
+hp
+</th>
+<th style="text-align:right;">
+drat
+</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td style="text-align:left;color: red;">
+Mazda RX4
+</td>
+<td style="text-align:right;">
+21.0
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+160
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.90
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Mazda RX4 Wag
+</td>
+<td style="text-align:right;">
+21.0
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+160
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.90
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Datsun 710
+</td>
+<td style="text-align:right;">
+22.8
+</td>
+<td style="text-align:right;">
+4
+</td>
+<td style="text-align:right;">
+108
+</td>
+<td style="text-align:right;">
+93
+</td>
+<td style="text-align:right;">
+3.85
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Hornet 4 Drive
+</td>
+<td style="text-align:right;">
+21.4
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+258
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.08
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Hornet Sportabout
+</td>
+<td style="text-align:right;">
+18.7
+</td>
+<td style="text-align:right;">
+8
+</td>
+<td style="text-align:right;">
+360
+</td>
+<td style="text-align:right;">
+175
+</td>
+<td style="text-align:right;">
+3.15
+</td>
+</tr>
+</tbody>
+</table>
+<p>However, very unfortunately, as we can see, the <code>hover</code> part is not working and the table still looks different from a regular bootstrap table. The reason is that gitbook defines its own way to style tables and some of its rules are conflicting with the one defined in bootstrap. For css, it’s like once you load something, it’s impossible to really unload it. As a result, unless there are some changes in <code>bookdown</code> (for example, we can replace the gitbook table part with bootstrap tables), there is nothing we can do here.</p>
+</div>
+<div id="epub" class="section level2">
+<h2><span class="header-section-number">3.2</span> Epub</h2>
+<p>Right now, it’s impossible to load addition CSS through HTML dependency (due to a setting in rmarkdown). I will file an issue in <code>rmarkdown</code> and see if this is something that can be changed. In the mean time, to use bootstrap tables in Epub, you will have to manually load <a href="https://github.com/haozhu233/kableExtra/blob/master/inst/bootstrapTable-3.3.7/bootstrapTable.min.css">this stylesheet</a> by putting it to a CSS file (such as “style.css”) and load it in <code>_output.yml</code>. For example,</p>
+<pre><code>bookdown::epub_book: 
+  stylesheet: style.css</code></pre>
+
+</div>
+</div>
+            </section>
+
+          </div>
+        </div>
+      </div>
+<a href="cross-format-tables-in-bookdown.html" class="navigation navigation-prev navigation-unique" aria-label="Previous page"><i class="fa fa-angle-left"></i></a>
+
+    </div>
+  </div>
+<script src="libs/gitbook-2.6.7/js/app.min.js"></script>
+<script src="libs/gitbook-2.6.7/js/lunr.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-search.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-sharing.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-fontsettings.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-bookdown.js"></script>
+<script src="libs/gitbook-2.6.7/js/jquery.highlight.js"></script>
+<script>
+gitbook.require(["gitbook"], function(gitbook) {
+gitbook.start({
+"sharing": {
+"github": false,
+"facebook": true,
+"twitter": true,
+"google": false,
+"linkedin": false,
+"weibo": false,
+"instapper": false,
+"vk": false,
+"all": ["facebook", "google", "twitter", "linkedin", "weibo", "instapaper"]
+},
+"fontsettings": {
+"theme": "white",
+"family": "sans",
+"size": 2
+},
+"edit": {
+"link": null,
+"text": null
+},
+"download": ["bookdown_example.pdf", "bookdown_example.epub"],
+"toc": {
+"collapse": "subsection"
+}
+});
+});
+</script>
+
+</body>
+
+</html>
diff --git a/docs/bookdown_example/_book/use-bootstrap-tables-in-gitbooks.html b/docs/bookdown_example/_book/use-bootstrap-tables-in-gitbooks.html
new file mode 100644
index 0000000..b573e60
--- /dev/null
+++ b/docs/bookdown_example/_book/use-bootstrap-tables-in-gitbooks.html
@@ -0,0 +1,361 @@
+<!DOCTYPE html>
+<html >
+
+<head>
+
+  <meta charset="UTF-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <title>Using kableExtra in Bookdown Projects</title>
+  <meta name="description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects.">
+  <meta name="generator" content="bookdown  and GitBook 2.6.7">
+
+  <meta property="og:title" content="Using kableExtra in Bookdown Projects" />
+  <meta property="og:type" content="book" />
+  
+  
+  <meta property="og:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
+  
+
+  <meta name="twitter:card" content="summary" />
+  <meta name="twitter:title" content="Using kableExtra in Bookdown Projects" />
+  
+  <meta name="twitter:description" content="This example provides documentations for using kableExtra to customize tables in bookdown projects." />
+  
+
+<meta name="author" content="Hao Zhu">
+
+
+<meta name="date" content="2018-10-03">
+
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black">
+  
+  
+<link rel="prev" href="cross-format-tables-in-bookdown.html">
+
+<script src="libs/jquery-2.2.3/jquery.min.js"></script>
+<link href="libs/gitbook-2.6.7/css/style.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-bookdown.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-highlight.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-search.css" rel="stylesheet" />
+<link href="libs/gitbook-2.6.7/css/plugin-fontsettings.css" rel="stylesheet" />
+
+
+
+
+
+
+
+<script src="libs/kePrint-0.0.1/kePrint.js"></script>
+<link href="libs/bsTable-3.3.7/bootstrapTable.min.css" rel="stylesheet" />
+
+
+<style type="text/css">
+a.sourceLine { display: inline-block; line-height: 1.25; }
+a.sourceLine { pointer-events: none; color: inherit; text-decoration: inherit; }
+a.sourceLine:empty { height: 1.2em; position: absolute; }
+.sourceCode { overflow: visible; }
+code.sourceCode { white-space: pre; position: relative; }
+div.sourceCode { margin: 1em 0; }
+pre.sourceCode { margin: 0; }
+@media screen {
+div.sourceCode { overflow: auto; }
+}
+@media print {
+code.sourceCode { white-space: pre-wrap; }
+a.sourceLine { text-indent: -1em; padding-left: 1em; }
+}
+pre.numberSource a.sourceLine
+  { position: relative; }
+pre.numberSource a.sourceLine:empty
+  { position: absolute; }
+pre.numberSource a.sourceLine::before
+  { content: attr(data-line-number);
+    position: absolute; left: -5em; text-align: right; vertical-align: baseline;
+    border: none; pointer-events: all;
+    -webkit-touch-callout: none; -webkit-user-select: none;
+    -khtml-user-select: none; -moz-user-select: none;
+    -ms-user-select: none; user-select: none;
+    padding: 0 4px; width: 4em;
+    color: #aaaaaa;
+  }
+pre.numberSource { margin-left: 3em; border-left: 1px solid #aaaaaa;  padding-left: 4px; }
+div.sourceCode
+  {  }
+@media screen {
+a.sourceLine::before { text-decoration: underline; }
+}
+code span.al { color: #ff0000; font-weight: bold; } /* Alert */
+code span.an { color: #60a0b0; font-weight: bold; font-style: italic; } /* Annotation */
+code span.at { color: #7d9029; } /* Attribute */
+code span.bn { color: #40a070; } /* BaseN */
+code span.bu { } /* BuiltIn */
+code span.cf { color: #007020; font-weight: bold; } /* ControlFlow */
+code span.ch { color: #4070a0; } /* Char */
+code span.cn { color: #880000; } /* Constant */
+code span.co { color: #60a0b0; font-style: italic; } /* Comment */
+code span.cv { color: #60a0b0; font-weight: bold; font-style: italic; } /* CommentVar */
+code span.do { color: #ba2121; font-style: italic; } /* Documentation */
+code span.dt { color: #902000; } /* DataType */
+code span.dv { color: #40a070; } /* DecVal */
+code span.er { color: #ff0000; font-weight: bold; } /* Error */
+code span.ex { } /* Extension */
+code span.fl { color: #40a070; } /* Float */
+code span.fu { color: #06287e; } /* Function */
+code span.im { } /* Import */
+code span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Information */
+code span.kw { color: #007020; font-weight: bold; } /* Keyword */
+code span.op { color: #666666; } /* Operator */
+code span.ot { color: #007020; } /* Other */
+code span.pp { color: #bc7a00; } /* Preprocessor */
+code span.sc { color: #4070a0; } /* SpecialChar */
+code span.ss { color: #bb6688; } /* SpecialString */
+code span.st { color: #4070a0; } /* String */
+code span.va { color: #19177c; } /* Variable */
+code span.vs { color: #4070a0; } /* VerbatimString */
+code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */
+</style>
+
+<link rel="stylesheet" href="style.css" type="text/css" />
+</head>
+
+<body>
+
+
+
+  <div class="book without-animation with-summary font-size-2 font-family-1" data-basepath=".">
+
+    <div class="book-summary">
+      <nav role="navigation">
+
+<ul class="summary">
+<li class="chapter" data-level="1" data-path="index.html"><a href="index.html"><i class="fa fa-check"></i><b>1</b> Introduction</a></li>
+<li class="chapter" data-level="2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html"><i class="fa fa-check"></i><b>2</b> Cross-format Tables in Bookdown</a><ul>
+<li class="chapter" data-level="2.1" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#use-the-k-m-approach-instead-of-m-k"><i class="fa fa-check"></i><b>2.1</b> Use the “K-M” approach instead of “M-K”</a></li>
+<li class="chapter" data-level="2.2" data-path="cross-format-tables-in-bookdown.html"><a href="cross-format-tables-in-bookdown.html#prepare-your-tables-for-both-formats"><i class="fa fa-check"></i><b>2.2</b> Prepare Your Tables for Both Formats</a></li>
+</ul></li>
+<li class="chapter" data-level="3" data-path="use-bootstrap-tables-in-gitbooks.html"><a href="use-bootstrap-tables-in-gitbooks.html"><i class="fa fa-check"></i><b>3</b> Use Bootstrap Tables in gitbooks</a></li>
+</ul>
+
+      </nav>
+    </div>
+
+    <div class="book-body">
+      <div class="body-inner">
+        <div class="book-header" role="navigation">
+          <h1>
+            <i class="fa fa-circle-o-notch fa-spin"></i><a href="./">Using kableExtra in Bookdown Projects</a>
+          </h1>
+        </div>
+
+        <div class="page-wrapper" tabindex="-1" role="main">
+          <div class="page-inner">
+
+            <section class="normal" id="section-">
+<div id="use-bootstrap-tables-in-gitbooks" class="section level1">
+<h1><span class="header-section-number">Chapter 3</span> Use Bootstrap Tables in gitbooks</h1>
+<p>Most of <code>kableExtra</code> tricks will work in <code>bookdown</code> except those requires <a href="http://getbootstrap.com/"><code>bootstrap</code></a>. By default, <code>rmarkdown</code> won’t load <code>bootstrap</code> for you on gitbook as there are potential conflict.</p>
+<pre class="sourceCode r"><code class="sourceCode r"><span class="kw">library</span>(kableExtra)
+<span class="kw">options</span>(<span class="dt">kableExtra.html.bsTable =</span> T)
+
+mtcars[<span class="dv">1</span><span class="op">:</span><span class="dv">5</span>, <span class="dv">1</span><span class="op">:</span><span class="dv">5</span>] <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">kable</span>(<span class="dt">booktabs =</span> T) <span class="op">%&gt;%</span><span class="st"> </span>
+<span class="st">  </span><span class="kw">kable_styling</span>(
+    <span class="dt">bootstrap_options =</span> <span class="kw">c</span>(<span class="st">&quot;striped&quot;</span>, <span class="st">&quot;bordered&quot;</span>),
+    <span class="dt">latex_options =</span> <span class="kw">c</span>(<span class="st">&quot;striped&quot;</span>),
+    <span class="dt">full_width =</span> F
+  ) <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">column_spec</span>(<span class="dv">1</span>, <span class="dt">color =</span> <span class="st">&quot;red&quot;</span>) <span class="op">%&gt;%</span>
+<span class="st">  </span><span class="kw">add_header_above</span>(<span class="kw">c</span>(<span class="st">&quot; &quot;</span>, <span class="st">&quot;Group A&quot;</span> =<span class="st"> </span><span class="dv">2</span>, <span class="st">&quot;Group B&quot;</span> =<span class="st"> </span><span class="dv">3</span>))</code></pre>
+<table class="table table-striped table-bordered" style="width: auto !important; margin-left: auto; margin-right: auto;">
+<thead>
+<tr>
+<th style="border-bottom:hidden" colspan="1">
+</th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="2">
+<div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">
+Group A
+</div>
+</th>
+<th style="border-bottom:hidden; padding-bottom:0; padding-left:3px;padding-right:3px;text-align: center; " colspan="3">
+<div style="border-bottom: 1px solid #ddd; padding-bottom: 5px; ">
+Group B
+</div>
+</th>
+</tr>
+<tr>
+<th style="text-align:left;">
+</th>
+<th style="text-align:right;">
+mpg
+</th>
+<th style="text-align:right;">
+cyl
+</th>
+<th style="text-align:right;">
+disp
+</th>
+<th style="text-align:right;">
+hp
+</th>
+<th style="text-align:right;">
+drat
+</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td style="text-align:left;color: red;">
+Mazda RX4
+</td>
+<td style="text-align:right;">
+21.0
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+160
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.90
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Mazda RX4 Wag
+</td>
+<td style="text-align:right;">
+21.0
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+160
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.90
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Datsun 710
+</td>
+<td style="text-align:right;">
+22.8
+</td>
+<td style="text-align:right;">
+4
+</td>
+<td style="text-align:right;">
+108
+</td>
+<td style="text-align:right;">
+93
+</td>
+<td style="text-align:right;">
+3.85
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Hornet 4 Drive
+</td>
+<td style="text-align:right;">
+21.4
+</td>
+<td style="text-align:right;">
+6
+</td>
+<td style="text-align:right;">
+258
+</td>
+<td style="text-align:right;">
+110
+</td>
+<td style="text-align:right;">
+3.08
+</td>
+</tr>
+<tr>
+<td style="text-align:left;color: red;">
+Hornet Sportabout
+</td>
+<td style="text-align:right;">
+18.7
+</td>
+<td style="text-align:right;">
+8
+</td>
+<td style="text-align:right;">
+360
+</td>
+<td style="text-align:right;">
+175
+</td>
+<td style="text-align:right;">
+3.15
+</td>
+</tr>
+</tbody>
+</table>
+
+</div>
+            </section>
+
+          </div>
+        </div>
+      </div>
+<a href="cross-format-tables-in-bookdown.html" class="navigation navigation-prev navigation-unique" aria-label="Previous page"><i class="fa fa-angle-left"></i></a>
+
+    </div>
+  </div>
+<script src="libs/gitbook-2.6.7/js/app.min.js"></script>
+<script src="libs/gitbook-2.6.7/js/lunr.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-search.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-sharing.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-fontsettings.js"></script>
+<script src="libs/gitbook-2.6.7/js/plugin-bookdown.js"></script>
+<script src="libs/gitbook-2.6.7/js/jquery.highlight.js"></script>
+<script>
+gitbook.require(["gitbook"], function(gitbook) {
+gitbook.start({
+"sharing": {
+"github": false,
+"facebook": true,
+"twitter": true,
+"google": false,
+"linkedin": false,
+"weibo": false,
+"instapper": false,
+"vk": false,
+"all": ["facebook", "google", "twitter", "linkedin", "weibo", "instapaper"]
+},
+"fontsettings": {
+"theme": "white",
+"family": "sans",
+"size": 2
+},
+"edit": {
+"link": null,
+"text": null
+},
+"download": ["bookdown_example.pdf", "bookdown_example.epub"],
+"toc": {
+"collapse": "subsection"
+}
+});
+});
+</script>
+
+</body>
+
+</html>
diff --git a/docs/bookdown_example/_bookdown.yml b/docs/bookdown_example/_bookdown.yml
new file mode 100644
index 0000000..a189c96
--- /dev/null
+++ b/docs/bookdown_example/_bookdown.yml
@@ -0,0 +1,6 @@
+book_filename: "bookdown_example"
+delete_merged_file: true
+new_session: true
+language:
+  ui:
+    chapter_name: "Chapter "
diff --git a/docs/bookdown_example/_output.yml b/docs/bookdown_example/_output.yml
new file mode 100644
index 0000000..0027923
--- /dev/null
+++ b/docs/bookdown_example/_output.yml
@@ -0,0 +1,11 @@
+bookdown::gitbook:
+  config:
+    download: ["pdf", "epub"]
+bookdown::pdf_book:
+  includes:
+    in_header: preamble.tex
+  latex_engine: xelatex
+  citation_package: natbib
+  keep_tex: yes
+bookdown::epub_book: 
+  stylesheet: style.css
diff --git a/docs/bookdown_example/book.bib b/docs/bookdown_example/book.bib
new file mode 100644
index 0000000..f52f3d2
--- /dev/null
+++ b/docs/bookdown_example/book.bib
@@ -0,0 +1,10 @@
+@Book{xie2015,
+  title = {Dynamic Documents with {R} and knitr},
+  author = {Yihui Xie},
+  publisher = {Chapman and Hall/CRC},
+  address = {Boca Raton, Florida},
+  year = {2015},
+  edition = {2nd},
+  note = {ISBN 978-1498716963},
+  url = {http://yihui.name/knitr/},
+}
diff --git a/docs/bookdown_example/bookdown_example.Rproj b/docs/bookdown_example/bookdown_example.Rproj
new file mode 100644
index 0000000..576174c
--- /dev/null
+++ b/docs/bookdown_example/bookdown_example.Rproj
@@ -0,0 +1,15 @@
+Version: 1.0
+
+RestoreWorkspace: Default
+SaveWorkspace: Default
+AlwaysSaveHistory: Default
+
+EnableCodeIndexing: Yes
+UseSpacesForTab: Yes
+NumSpacesForTab: 2
+Encoding: UTF-8
+
+RnwWeave: Sweave
+LaTeX: XeLaTeX
+
+BuildType: Website
diff --git a/docs/bookdown_example/bookdown_example.rds b/docs/bookdown_example/bookdown_example.rds
new file mode 100644
index 0000000..348f349
--- /dev/null
+++ b/docs/bookdown_example/bookdown_example.rds
Binary files differ
diff --git a/docs/bookdown_example/index.Rmd b/docs/bookdown_example/index.Rmd
new file mode 100644
index 0000000..6be41f7
--- /dev/null
+++ b/docs/bookdown_example/index.Rmd
@@ -0,0 +1,19 @@
+--- 
+title: "Using kableExtra in Bookdown Projects"
+author: "Hao Zhu"
+date: "`r Sys.Date()`"
+site: bookdown::bookdown_site
+documentclass: book
+bibliography: [book.bib, packages.bib]
+biblio-style: apalike
+link-citations: yes
+description: "This example provides documentations for using kableExtra to customize tables in bookdown projects. "
+---
+
+# Introduction
+
+If you have tried to use `kableExtra` in a `bookdown` project with mutltiple formats, you may have experienced some problems. For example, you might not be able to render HTML and PDF tables at the same time using the same piece of code. At the same time, you might start to wonder if it's possible to create `bootstrap` style tables in `gitbook`. I will try to address these issues using this example. 
+
+This book is hosted at https://github.com/haozhu233/kableExtra/tree/master/docs.
+
+You can find the source code for this project at https://github.com/haozhu233/kableExtra/tree/master/docs.
diff --git a/docs/bookdown_example/packages.bib b/docs/bookdown_example/packages.bib
new file mode 100644
index 0000000..0859697
--- /dev/null
+++ b/docs/bookdown_example/packages.bib
@@ -0,0 +1,29 @@
+@Manual{R-base,
+  title = {R: A Language and Environment for Statistical Computing},
+  author = {{R Core Team}},
+  organization = {R Foundation for Statistical Computing},
+  address = {Vienna, Austria},
+  year = {2018},
+  url = {https://www.R-project.org/},
+}
+@Manual{R-bookdown,
+  title = {bookdown: Authoring Books and Technical Documents with R Markdown},
+  author = {Yihui Xie},
+  note = {R package version 0.7.19},
+  url = {https://github.com/rstudio/bookdown},
+  year = {2018},
+}
+@Manual{R-knitr,
+  title = {knitr: A General-Purpose Package for Dynamic Report Generation in R},
+  author = {Yihui Xie},
+  year = {2018},
+  note = {R package version 1.20},
+  url = {https://CRAN.R-project.org/package=knitr},
+}
+@Manual{R-rmarkdown,
+  title = {rmarkdown: Dynamic Documents for R},
+  author = {JJ Allaire and Yihui Xie and Jonathan McPherson and Javier Luraschi and Kevin Ushey and Aron Atkins and Hadley Wickham and Joe Cheng and Winston Chang},
+  year = {2018},
+  note = {R package version 1.10},
+  url = {https://CRAN.R-project.org/package=rmarkdown},
+}
diff --git a/docs/bookdown_example/preamble.tex b/docs/bookdown_example/preamble.tex
new file mode 100644
index 0000000..dfd2e14
--- /dev/null
+++ b/docs/bookdown_example/preamble.tex
@@ -0,0 +1 @@
+\usepackage{booktabs}
diff --git a/docs/bookdown_example/style.css b/docs/bookdown_example/style.css
new file mode 100644
index 0000000..d063c94
--- /dev/null
+++ b/docs/bookdown_example/style.css
@@ -0,0 +1,14 @@
+/*!
+ * Bootstrap v3.3.7 (http://getbootstrap.com)
+ * Copyright 2011-2018 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+
+/*!
+ * Generated using the Bootstrap Customizer (<none>)
+ * Config saved to config.json and <none>
+ *//*!
+ * Bootstrap v3.3.7 (http://getbootstrap.com)
+ * Copyright 2011-2016 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
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