Update to reveal.js 4.6.1
Change-Id: I566737c50b93dd8c094ad3c3fa59865260b3b4ba
diff --git a/inst/reveal.js-4.6.1/js/utils/constants.js b/inst/reveal.js-4.6.1/js/utils/constants.js
new file mode 100644
index 0000000..43fcb84
--- /dev/null
+++ b/inst/reveal.js-4.6.1/js/utils/constants.js
@@ -0,0 +1,10 @@
+
+export const SLIDES_SELECTOR = '.slides section';
+export const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';
+export const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';
+
+// Methods that may not be invoked via the postMessage API
+export const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener|showPreview/;
+
+// Regex for retrieving the fragment style from a class attribute
+export const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;
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