250 lines
8.7 KiB
HTML
250 lines
8.7 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head lang="en">
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<meta charset="UTF-8" />
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<title>Conditional native lazy loading - Lazyload demos</title>
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<style>
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ul,
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li {
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list-style-type: none;
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margin: 0;
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padding: 0;
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}
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a,
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img {
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display: block;
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}
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img {
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border: 0;
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width: 220px;
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height: 280px;
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}
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img:not([src]) {
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visibility: hidden;
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}
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.warning {
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padding: 1em;
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color: black;
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background: lightyellow;
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border-radius: 1em;
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border: 1px solid gray;
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}
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/* Fixes Firefox anomaly during image load */
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@-moz-document url-prefix() {
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img:-moz-loading {
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visibility: hidden;
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}
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}
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</style>
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</head>
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<body>
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<h1>Conditional native lazy loading demo</h1>
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<h2>Images</h2>
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<div id="results1" class="results">
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<ul>
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<li>
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<a href="#/it/donna/stivaletti_cod44721746jj.html"
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><img
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alt="Stivaletti"
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loading="eager"
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src="https://images.unsplash.com/photo-1555923637-8e28485258ca?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=440&h=560&fit=crop&ixid=eyJhcHBfaWQiOjF9"
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width="220"
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height="280"
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/></a>
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</li>
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<li>
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<a href="#/it/donna/open-toe_cod44740806jx.html"
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><img
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alt="Open toe"
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loading="eager"
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src="https://images.unsplash.com/photo-1543286386-2e659306cd6c?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=440&h=560&fit=crop&ixid=eyJhcHBfaWQiOjF9"
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width="220"
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height="280"
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/></a>
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</li>
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<li>
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<a href="#/it/donna/sneakers-tennis-shoes-basse_cod44735977gr.html"
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><img
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alt="Sneakers & Tennis"
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class="lazy"
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data-src="https://images.unsplash.com/photo-1554080450-0cf441c6eb68?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=440&h=560&fit=crop&ixid=eyJhcHBfaWQiOjF9"
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width="220"
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height="280"
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/></a>
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</li>
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<li>
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<a href="#/it/donna/sneakers-tennis-shoes-basse_cod44738717am.html"
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><img
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alt="Sneakers & Tennis shoes basse"
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class="lazy"
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data-src="https://images.unsplash.com/photo-1554194666-dd5e2510e694?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=440&h=560&fit=crop&ixid=eyJhcHBfaWQiOjF9"
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width="220"
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height="280"
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/></a>
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</li>
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<li>
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<a href="#/it/donna/sneakers-tennis-shoes-alte_cod44739940cb.html"
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><img
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alt="Sneakers & Tennis shoes alte"
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class="lazy"
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data-src="https://images.unsplash.com/photo-1555464735-4706a5ef4bf6?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=440&h=560&fit=crop&ixid=eyJhcHBfaWQiOjF9"
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width="220"
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height="280"
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/></a>
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</li>
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<li>
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<a href="#/it/donna/sneakers-tennis-shoes-alte_cod44740860xg.html"
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><img
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alt="Sneakers & Tennis shoes alte"
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class="lazy"
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data-src="https://images.unsplash.com/photo-1556068791-9e3a08d59470?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=440&h=560&fit=crop&ixid=eyJhcHBfaWQiOjF9"
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width="220"
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height="280"
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/></a>
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</li>
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<li>
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<a href="#/it/donna/sneakers-tennis-shoes-basse_cod44738719vn.html"
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><img
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alt="Sneakers & Tennis shoes basse"
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class="lazy"
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data-src="https://images.unsplash.com/photo-1554089672-043830ebaed9?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=440&h=560&fit=crop&ixid=eyJhcHBfaWQiOjF9"
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width="220"
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height="280"
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/></a>
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</li>
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</ul>
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</div>
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<h2>Iframes</h2>
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<iframe class="lazy" data-src="iframes/i01.html" frameborder="0"></iframe>
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<iframe class="lazy" data-src="iframes/i02.html" frameborder="0"></iframe>
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<iframe class="lazy" data-src="iframes/i03.html" frameborder="0"></iframe>
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<h2>Preload = none</h2>
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<video
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class="lazy"
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controls
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preload="none"
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width="620"
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data-src="https://archive.org/download/BigBuckBunny_124/Content/big_buck_bunny_720p_surround.mp4"
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data-poster="https://peach.blender.org/wp-content/uploads/title_anouncement.jpg?x11217"
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>
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<source
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type="video/mp4"
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data-src="https://archive.org/download/ElephantsDream/ed_1024_512kb.mp4"
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/>
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<source type="video/ogg" data-src="https://archive.org/download/ElephantsDream/ed_hd.ogv" />
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<source type="video/avi" data-src="https://archive.org/download/ElephantsDream/ed_hd.avi" />
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</video>
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<h2>Preload = metadata</h2>
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<video
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class="lazy"
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preload="metadata"
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controls
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width="620"
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data-src="https://archive.org/download/BigBuckBunny_124/Content/big_buck_bunny_720p_surround.mp4"
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data-poster="https://peach.blender.org/wp-content/uploads/title_anouncement.jpg?x11217"
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>
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<source
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type="video/mp4"
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data-src="https://archive.org/download/ElephantsDream/ed_1024_512kb.mp4"
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/>
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<source type="video/ogg" data-src="https://archive.org/download/ElephantsDream/ed_hd.ogv" />
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<source type="video/avi" data-src="https://archive.org/download/ElephantsDream/ed_hd.avi" />
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</video>
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<script src="../dist/lazyload.min.js"></script>
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<script>
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(function () {
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function logElementEvent(eventName, element) {
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console.log(Date.now(), eventName, element.getAttribute("data-src"));
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}
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var callback_enter = function (element) {
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logElementEvent("🔑 ENTERED", element);
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};
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var callback_exit = function (element) {
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logElementEvent("🚪 EXITED", element);
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};
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var callback_loading = function (element) {
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logElementEvent("⌚ LOADING", element);
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};
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var callback_loaded = function (element) {
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logElementEvent("👍 LOADED", element);
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};
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var callback_error = function (element) {
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logElementEvent("💀 ERROR", element);
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element.src = "https://source.unsplash.com/random/440x560/?text=Error+Placeholder";
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};
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var callback_finish = function () {
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logElementEvent("✔️ FINISHED", document.documentElement);
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};
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var callback_cancel = function (element) {
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logElementEvent("🔥 CANCEL", element);
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};
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function supportsNativeLazyVideo() {
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return "loading" in HTMLVideoElement.prototype;
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}
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// Single instance using native lazy loading on images, videos and iframes
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function createSingleInstance() {
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var lazyAll = new LazyLoad({
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use_native: true,
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// NOTICE: they won't be called since the loading will be native
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callback_enter: callback_enter,
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callback_exit: callback_exit,
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callback_cancel: callback_cancel,
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callback_loading: callback_loading,
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callback_loaded: callback_loaded,
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callback_error: callback_error,
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callback_finish: callback_finish
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});
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}
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// Double instance using native lazy loading on images and iframes,
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// and JS driven lazy loading on videos
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function createDoubleInstance() {
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var lazyImgsIframes = new LazyLoad({
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elements_selector: "img.lazy, iframe.lazy",
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use_native: true,
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// Assign the callbacks defined above
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// NOTICE: they won't all called since the loading will be native
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callback_enter: callback_enter,
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callback_exit: callback_exit,
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callback_cancel: callback_cancel,
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callback_loading: callback_loading,
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callback_loaded: callback_loaded,
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callback_error: callback_error,
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callback_finish: callback_finish
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});
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var lazyVideos = new LazyLoad({
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elements_selector: "video.lazy",
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// Assign the callbacks defined above
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callback_enter: callback_enter,
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callback_exit: callback_exit,
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callback_cancel: callback_cancel,
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callback_loading: callback_loading,
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callback_loaded: callback_loaded,
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callback_error: callback_error,
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callback_finish: callback_finish
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});
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}
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if (supportsNativeLazyVideo()) {
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createSingleInstance();
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} else {
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createDoubleInstance();
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}
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})();
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</script>
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</body>
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</html>
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