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# reveal.js [](https://travis-ci.org/hakimel/reveal.js) A framework for easily creating beautiful presentations using HTML. [Check out the live demo](http://lab.hakim.se/reveal-js/). reveal.js comes with a broad range of features including [nested slides](https://github.com/hakimel/reveal.js#markup), [markdown contents](https://github.com/hakimel/reveal.js#markdown), [PDF export](https://github.com/hakimel/reveal.js#pdf-export), [speaker notes](https://github.com/hakimel/reveal.js#speaker-notes) and a [JavaScript API](https://github.com/hakimel/reveal.js#api). It's best viewed in a browser with support for CSS 3D transforms but [fallbacks](https://github.com/hakimel/reveal.js/wiki/Browser-Support) are available to make sure your presentation can still be viewed elsewhere. #### More reading in the Wiki: - [Changelog](https://github.com/hakimel/reveal.js/wiki/Changelog): Up-to-date version history. - [Examples](https://github.com/hakimel/reveal.js/wiki/Example-Presentations): Presentations created with reveal.js, add your own! - [Browser Support](https://github.com/hakimel/reveal.js/wiki/Browser-Support): Explanation of browser support and fallbacks. ## rvl.io Slides are written using HTML or markdown but there's also an online editor for those of you who prefer a more traditional user interface. Give it a try at [www.rvl.io](http://www.rvl.io). ## Instructions ### Markup Markup hierarchy needs to be ``<div class="reveal"> <div class="slides"> <section>`` where the ``<section>`` represents one slide and can be repeated indefinitely. If you place multiple ``<section>``'s inside of another ``<section>`` they will be shown as vertical slides. The first of the vertical slides is the "root" of the others (at the top), and it will be included in the horizontal sequence. For example: ```html <div class="reveal"> <div class="slides"> <section>Single Horizontal Slide</section> <section> <section>Vertical Slide 1</section> <section>Vertical Slide 2</section> </section> </div> </div> ``` ### Markdown It's possible to write your slides using Markdown. To enable Markdown, add the ```data-markdown``` attribute to your ```<section>``` elements and wrap the contents in a ```<script type="text/template">``` like the example below. This is based on [data-markdown](https://gist.github.com/1343518) from [Paul Irish](https://github.com/paulirish) which in turn uses [showdown](https://github.com/coreyti/showdown/). Sensitive to indentation (avoid mixing tabs and spaces) and line breaks (avoid consecutive breaks). ```html <section data-markdown> <script type="text/template"> ## Page title A paragraph with some text and a [link](http://hakim.se). </script> </section> ``` #### External Markdown You can write your content as a separate file and have reveal.js load it at runtime. Note the separator arguments which determine how slides are delimited in the external file. ```html <section data-markdown="example.md" data-separator="^\n\n\n" data-vertical="^\n\n"></section> ``` ### Configuration At the end of your page you need to initialize reveal by running the following code. Note that all config values are optional and will default as specified below. ```javascript Reveal.initialize({ // Display controls in the bottom right corner controls: true, // Display a presentation progress bar progress: true, // Push each slide change to the browser history history: false, // Enable keyboard shortcuts for navigation keyboard: true, // Enable the slide overview mode overview: true, // Vertical centering of slides center: true, // Loop the presentation loop: false, // Change the presentation direction to be RTL rtl: false, // Number of milliseconds between automatically proceeding to the // next slide, disabled when set to 0, this value can be overwritten // by using a data-autoslide attribute on your slides autoSlide: 0, // Enable slide navigation via mouse wheel mouseWheel: false, // Apply a 3D roll to links on hover rollingLinks: true, // Transition style transition: 'default', // default/cube/page/concave/zoom/linear/fade/none // Transition speed transitionSpeed: 'default', // default/fast/slow }); ``` Note that the new default vertical centering option will break compatibility with slides that were using transitions with backgrounds (`cube` and `page`). To restore the previous behavior, set `center` to `false`. The configuration can be updated after initialization using the ```configure``` method: ```javascript // Turn autoSlide off Reveal.configure({ autoSlide: 0 }); // Start auto-sliding every 5s Reveal.configure({ autoSlide: 5000 }); ``` ### Presentation Size All presentations have a normal size, that is the resolution at which they are authored. The framework will automatically scale presentations uniformly based on this size to ensure that everything fits on any given display or viewport. See below for a list of configuration options related to sizing, including default values: ```javascript Reveal.initialize({ ... // The "normal" size of the presentation, aspect ratio will be preserved // when the presentation is scaled to fit different resolutions. Can be // specified using percentage units. width: 960, height: 700, // Factor of the display size that should remain empty around the content margin: 0.1, // Bounds for smallest/largest possible scale to apply to content minScale: 0.2, maxScale: 1.0 }); ``` ### Dependencies Reveal.js doesn't _rely_ on any third party scripts to work but a few optional libraries are included by default. These libraries are loaded as dependencies in the order they appear, for example: ```javascript Reveal.initialize({ dependencies: [ // Cross-browser shim that fully implements classList - https://github.com/eligrey/classList.js/ { src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } }, // Interpret Markdown in <section> elements { src: 'plugin/markdown/showdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } }, { src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } }, // Syntax highlight for <code> elements { src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }, // Zoom in and out with Alt+click { src: 'plugin/zoom-js/zoom.js', async: true, condition: function() { return !!document.body.classList; } }, // Speaker notes { src: 'plugin/notes/notes.js', async: true, condition: function() { return !!document.body.classList; } }, // Remote control your reveal.js presentation using a touch device { src: 'plugin/remotes/remotes.js', async: true, condition: function() { return !!document.body.classList; } } ] }); ``` You can add your own extensions using the same syntax. The following properties are available for each dependency object: - **src**: Path to the script to load - **async**: [optional] Flags if the script should load after reveal.js has started, defaults to false - **callback**: [optional] Function to execute when the script has loaded - **condition**: [optional] Function which must return true for the script to be loaded ### API The ``Reveal`` class provides a minimal JavaScript API for controlling navigation and reading state: ```javascript // Navigation Reveal.slide( indexh, indexv, indexf ); Reveal.left(); Reveal.right(); Reveal.up(); Reveal.down(); Reveal.prev(); Reveal.next(); Reveal.prevFragment(); Reveal.nextFragment(); Reveal.toggleOverview(); // Retrieves the previous and current slide elements Reveal.getPreviousSlide(); Reveal.getCurrentSlide(); Reveal.getIndices(); // { h: 0, v: 0 } } ``` ### States If you set ``data-state="somestate"`` on a slide ``<section>``, "somestate" will be applied as a class on the document elemen