diff options
Diffstat (limited to 'js')
| -rw-r--r-- | js/reveal.js | 39 |
1 files changed, 14 insertions, 25 deletions
diff --git a/js/reveal.js b/js/reveal.js index de12ed7..0437d2d 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -180,6 +180,13 @@ // - false: No media will autoplay, regardless of individual setting autoPlayMedia: null, + // Global override for preloading lazy-loaded iframes + // - null: Iframes with data-src AND data-preload will be loaded when within + // the viewDistance, iframes with only data-src will be loaded when visible + // - true: All iframes with data-src will be loaded when within the viewDistance + // - false: All iframes with data-src will be loaded only when visible + preloadIframes: null, + // Controls automatic progression to the next slide // - 0: Auto-sliding only happens if the data-autoslide HTML attribute // is present on the current slide or fragment @@ -3677,7 +3684,7 @@ * * @param {HTMLElement} element */ - function shouldPreload(element) { + function shouldPreload( element ) { // Prefer an explicit global preload setting var preload = config.preloadIframes; @@ -3707,18 +3714,10 @@ // Media elements with data-src attributes toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ) ).forEach( function( element ) { - var load = function( el ) { - el.setAttribute( 'src', el.getAttribute( 'data-src' ) ); - el.setAttribute( 'data-lazy-loaded', '' ); - el.removeAttribute( 'data-src' ); - }; - - if( element.tagName === 'IFRAME') { - if( shouldPreload(element) ) { - load(element); - } - } else { - load(element); + if( element.tagName !== 'IFRAME' || shouldPreload( element ) ) { + element.setAttribute( 'src', element.getAttribute( 'data-src' ) ); + element.setAttribute( 'data-lazy-loaded', '' ); + element.removeAttribute( 'data-src' ); } } ); @@ -3838,18 +3837,8 @@ // Reset lazy-loaded media elements with src attributes toArray( slide.querySelectorAll( 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ) ).forEach( function( element ) { - var unload = function( el ) { - el.setAttribute( 'data-src', el.getAttribute( 'src' ) ); - el.removeAttribute( 'src' ); - }; - - if( element.tagName === 'IFRAME' ) { - if( shouldPreload(element) ) { - unload(element); - } - } else { - unload(element); - } + element.setAttribute( 'data-src', element.getAttribute( 'src' ) ); + element.removeAttribute( 'src' ); } ); // Reset lazy-loaded media elements with <source> children |