122 lines
3.4 KiB
HTML
122 lines
3.4 KiB
HTML
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<!-- Defines element markup -->
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<template>
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<style>
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.youtube {
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background-color: #000;
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margin-bottom: 30px;
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position: relative;
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padding-top: 56.25%;
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overflow: hidden;
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cursor: pointer;
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}
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.youtube img {
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width: 100%;
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top: -16.82%;
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left: 0;
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opacity: 0.7;
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}
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.youtube .play-button {
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width: 90px;
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height: 60px;
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background-color: #333;
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box-shadow: 0 0 30px rgba( 0,0,0,0.6 );
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z-index: 1;
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opacity: 0.8;
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border-radius: 6px;
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}
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.youtube .play-button:before {
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content: "";
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border-style: solid;
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border-width: 15px 0 15px 26.0px;
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border-color: transparent transparent transparent #fff;
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}
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.youtube img,
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.youtube .play-button {
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cursor: pointer;
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}
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.youtube img,
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.youtube iframe,
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.youtube .play-button,
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.youtube .play-button:before {
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position: absolute;
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}
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.youtube .play-button,
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.youtube .play-button:before {
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top: 50%;
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left: 50%;
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transform: translate3d( -50%, -50%, 0 );
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}
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.youtube iframe {
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height: 100%;
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width: 100%;
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top: 0;
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left: 0;
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}
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</style>
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<div class="youtube">
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<div class="play-button"></div>
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</div>
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</template>
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<script>
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(function(window, document, undefined) {
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// Refers to the "importer", which is index.html
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var thatDoc = document;
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// Refers to the "importee", which is youtube-embed.html
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var thisDoc = (thatDoc._currentScript || thatDoc.currentScript).ownerDocument;
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// Gets content from <template>.
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var template = thisDoc.querySelector( 'template' ).content;
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// Creates an object based in the HTML Element prototype.
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var YoutubeProto = Object.create( HTMLElement.prototype );
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// Fires when an instance of the element is created.
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YoutubeProto.createdCallback = function() {
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// Creates the shadow root.
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var shadowRoot = this.createShadowRoot();
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// Adds a template clone into shadow root.
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var clone = thatDoc.importNode( template, true );
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shadowRoot.appendChild( clone );
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var embed = this.getAttribute( "embed" );
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var video = shadowRoot.querySelector( ".youtube" );
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this.doTheThing( embed, video );
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};
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YoutubeProto.doTheThing = function( embedID, videoElem ) {
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var source = "https://img.youtube.com/vi/"+ embedID +"/sddefault.jpg";
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var image = new Image();
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image.src = source;
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image.addEventListener( "load", function() {
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videoElem.appendChild( image );
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});
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videoElem.addEventListener( "click", function() {
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var iframe = document.createElement( "iframe" );
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iframe.setAttribute( "frameborder", "0" );
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iframe.setAttribute( "allowfullscreen", "" );
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iframe.setAttribute( "src", "https://www.youtube-nocookie.com/embed/"+ embedID +"?rel=0&showinfo=0&autoplay=1" );
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this.innerHTML = "";
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this.appendChild( iframe );
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} );
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};
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// Registers <youtube-embed> in the main document.
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window.youtubeEmbed = thatDoc.registerElement( 'youtube-embed', {
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prototype : YoutubeProto
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});
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})(window, document);
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</script>
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