lazy loading support for video #793
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js/reveal.js
20
js/reveal.js
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@ -2172,11 +2172,29 @@ var Reveal = (function(){
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*/
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function loadSlide( slide ) {
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toArray( slide.querySelectorAll( 'img[data-src]' ) ).forEach( function( element ) {
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// Media elements with data-src attributes
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toArray( slide.querySelectorAll( 'img[data-src], video[data-src]' ) ).forEach( function( element ) {
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element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
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element.removeAttribute( 'data-src' );
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} );
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// Video elements with multiple <source>s
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toArray( slide.querySelectorAll( 'video' ) ).forEach( function( video ) {
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var sources = 0;
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toArray( slide.querySelectorAll( 'source[data-src]' ) ).forEach( function( source ) {
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source.setAttribute( 'src', source.getAttribute( 'data-src' ) );
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source.removeAttribute( 'data-src' );
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sources += 1;
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} );
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// If we rewrote sources for this video, we need to manually
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// tell it to load from its new origin
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if( sources > 0 ) {
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video.load();
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}
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} );
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}
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/**
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