github.com/sentienttechnologies/studio-go-runner@v0.0.0-20201118202441-6d21f2ced8ee/docs/slides/plugin/math/math.js (about)

     1  /**
     2   * A plugin which enables rendering of math equations inside
     3   * of reveal.js slides. Essentially a thin wrapper for MathJax.
     4   *
     5   * @author Hakim El Hattab
     6   */
     7  var RevealMath = window.RevealMath || (function(){
     8  
     9  	var options = Reveal.getConfig().math || {};
    10  	options.mathjax = options.mathjax || 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js';
    11  	options.config = options.config || 'TeX-AMS_HTML-full';
    12  
    13  	loadScript( options.mathjax + '?config=' + options.config, function() {
    14  
    15  		MathJax.Hub.Config({
    16  			messageStyle: 'none',
    17  			tex2jax: {
    18  				inlineMath: [['$','$'],['\\(','\\)']] ,
    19  				skipTags: ['script','noscript','style','textarea','pre']
    20  			},
    21  			skipStartupTypeset: true
    22  		});
    23  
    24  		// Typeset followed by an immediate reveal.js layout since
    25  		// the typesetting process could affect slide height
    26  		MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub ] );
    27  		MathJax.Hub.Queue( Reveal.layout );
    28  
    29  		// Reprocess equations in slides when they turn visible
    30  		Reveal.addEventListener( 'slidechanged', function( event ) {
    31  
    32  			MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, event.currentSlide ] );
    33  
    34  		} );
    35  
    36  	} );
    37  
    38  	function loadScript( url, callback ) {
    39  
    40  		var head = document.querySelector( 'head' );
    41  		var script = document.createElement( 'script' );
    42  		script.type = 'text/javascript';
    43  		script.src = url;
    44  
    45  		// Wrapper for callback to make sure it only fires once
    46  		var finish = function() {
    47  			if( typeof callback === 'function' ) {
    48  				callback.call();
    49  				callback = null;
    50  			}
    51  		}
    52  
    53  		script.onload = finish;
    54  
    55  		// IE
    56  		script.onreadystatechange = function() {
    57  			if ( this.readyState === 'loaded' ) {
    58  				finish();
    59  			}
    60  		}
    61  
    62  		// Normal browsers
    63  		head.appendChild( script );
    64  
    65  	}
    66  
    67  })();