smart argument has been removed from revealjs_presentation() has no more used by rmarkdown. smart = TRUE is still the default. If you need to deactivate, use md_extentions = "-smart".
Add title-slide id on the auto generated title slide to ease the styling using CSS.
Support background-image pandoc's variable as other slide framework to customize the option parallaxBackgroundImage. This duplicates the variable parallaxBackgroundImage which still get precedence.
Fix template to add the necessary CSS to format columns layout and other Pandoc's features (thanks, @atusy, #82).
Fix an issue with some configurations keys for chalkboard plugin - multiple value are now correctly passed to Pandoc's template (thanks, @grayknight2, @atusy, #62, #88).
Fix issues with quoting of options when passed as variables to Pandoc. This was caused by a change in Pandoc 2.14.0.3 which now sets some default value for reveal.js options (thanks, @iain-palmer, #72).
Add md_extensions argument in revealjs_presentation() (thanks, @atusy, #75).
Add support for the menu plugin
Correct handling of pdf css for self_contained document
Remove html5shiv.js from template
Update to reveal.js 3.3
Push slide changes to browser history
Respect slide_level option
Support for zoom, search, and notes reveal.js plugins
Ability to specify slideNumber reveal_option as either string or boolean