73 lines
1.8 KiB
JavaScript
Executable File
73 lines
1.8 KiB
JavaScript
Executable File
/**
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* A plugin which enables rendering of math equations inside
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* of reveal.js slides. Essentially a thin wrapper for MathJax.
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*
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* @author Hakim El Hattab
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*/
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var RevealMath = window.RevealMath || (function(){
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var loaded = false;
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var config = Reveal.getConfig().math || {};
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config.host = config.host || 'http://cdn.mathjax.org/mathjax/latest/MathJax.js';
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config.mode = config.mode || 'TeX-AMS_HTML-full';
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loadScript( config.host + '?config=' + config.mode, function() {
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// Conditioned just in case both onload and readystate fire
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if( loaded === false ) {
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loaded = true;
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MathJax.Hub.Config({
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messageStyle: 'none',
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tex2jax: { inlineMath: [['$','$'],['\\(','\\)']] }
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});
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// Process any math inside of the current slide when navigating,
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// this is needed since it's not possible to typeset equations
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// within invisible elements (far future or past).
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Reveal.addEventListener( 'slidechanged', function( event ) {
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// This will only typeset equations that have not yet been
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// processed, as well as equations that have change since
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// last being processed.
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MathJax.Hub.Update( event.currentSlide, function() {
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Reveal.layout();
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} );
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} );
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}
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} );
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function loadScript( url, callback ) {
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var head = document.querySelector( 'head' );
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var script = document.createElement( 'script' );
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script.type = 'text/javascript';
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script.src = url;
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// Wrapper for callback to make sure it only fires once
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var finish = function() {
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if( typeof callback === 'function' ) {
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callback.call();
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callback = null;
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}
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}
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script.onload = finish;
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// IE
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script.onreadystatechange = function() {
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if ( this.readyState === 'loaded' ) {
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finish.call();
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}
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}
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// Normal browsers
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head.appendChild( script );
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}
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})();
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