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<head> <title>iron-image demo</title> <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1, user-scalable=yes"> <meta name="mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-capable" content="yes"> <script src="../../webcomponentsjs/webcomponents-lite.js"></script> <link rel="import" href="../../iron-demo-helpers/demo-pages-shared-styles.html"> <link rel="import" href="../../iron-demo-helpers/demo-snippet.html"> <link rel="import" href="../../polymer/polymer.html"> <link rel="import" href="../iron-image.html"> <style is="custom-style" include="demo-pages-shared-styles"> .example { margin: 4px; flex: 1; } code { white-space: nowrap; } </style> <script> function load(id) { document.getElementById(id).src = "./polymer.svg?" + Math.random(); } </script> </head> <body unresolved> <div class="vertical-section-container centered"> <h3>A plain <code>iron-image</code>.</h3> <demo-snippet class="centered-demo"> <template> <iron-image alt="The Polymer logo." src="./polymer.svg"></iron-image> </template> </demo-snippet> <h3> <code>sizing="cover"</code> expands the image to cover all of its specified size. </h3> <demo-snippet class="centered-demo"> <template> <style is="custom-style"> #example-sizing-cover { width: 150px; height: 150px; background: #ddd; } </style> <iron-image sizing="cover" id="example-sizing-cover" alt="The Polymer logo." src="./polymer.svg"></iron-image> </template> </demo-snippet> <h3> <code>sizing="contain"</code> expands the image to fit within its specified size. </h3> <demo-snippet class="centered-demo"> <template> <style is="custom-style"> #example-sizing-contain { width: 150px; height: 150px; background: #ddd; } </style> <iron-image sizing="contain" id="example-sizing-contain" alt="The Polymer logo." src="./polymer.svg"></iron-image> </template> </demo-snippet> <h3> Use the <code>--iron-image-width</code> property to set the width of the image wrapped by the <code>iron-image</code>. </h3> <demo-snippet class="centered-demo"> <template> <style is="custom-style"> #example-full-width-container { width: 200px; border: 2px solid #444; background: #444; } #example-full-width-container iron-image { background: #ddd; } #example-full-width { width: 100%; --iron-image-width: 100%; } #example-half-width { width: 50%; --iron-image-width: 100%; } </style> <div id="example-full-width-container"> <iron-image id="example-full-width" alt="The Polymer logo." src="./polymer.svg"></iron-image> <iron-image id="example-half-width" alt="The Polymer logo." src="./polymer.svg"></iron-image> </div> </template> </demo-snippet> <h3> Use the <code>--iron-image-height</code> property to set the height of the image wrapped by the <code>iron-image</code>. </h3> <demo-snippet class="centered-demo"> <template> <style is="custom-style"> #example-full-height-container { height: 150px; border: 2px solid #444; background: #444; } #example-full-height-container iron-image{ background: #ddd; } #example-full-height { height: 100%; --iron-image-height: 100%; } #example-half-height { height: 50%; --iron-image-height: 100%; } </style> <div id="example-full-height-container"> <iron-image id="example-full-height" alt="The Polymer logo." src="./polymer.svg"></iron-image> <iron-image id="example-half-height" alt="The Polymer logo." src="./polymer.svg"></iron-image> </div> </template> </demo-snippet> <h3> No placeholder is shown by default. </h3> <demo-snippet class="centered-demo"> <template> <style is="custom-style"> .example.without-preload iron-image { width: 150px; height: 150px; background: #ddd; } </style> <div class="example without-preload"> <button onclick="load('example-without-preload-1')"> Load image </button> <br> <iron-image sizing="contain" alt="The Polymer logo." id="example-without-preload-1"></iron-image> </div> </template> </demo-snippet> <h3> The <code>preload</code> attribute shows a placeholder element in front of the image before it has loaded. Use the <code>--iron-image-placeholder</code> CSS mixin to style it. </h3> <demo-snippet class="centered-demo"> <template> <style is="custom-style"> .example.preload iron-image { width: 150px; height: 150px; background: #ddd; --iron-image-placeholder: { background: #939ed5; }; } </style> <div class="example preload"> <button onclick="load('example-preload-1')"> Load image </button> <br> <iron-image preload id="example-preload-1" alt="The Polymer logo." class="sized" sizing="contain"></iron-image> <br> Without the <code>fade</code> attribute, the placeholder element is hidden with no transition when the image loads. </div> <div class="example preload"> <button onclick="load('example-preload-2')"> Load image </button> <br> <iron-image preload fade id="example-preload-2" alt="The Polymer logo." class="sized" sizing="contain"></iron-image> <br> With the <code>fade</code> attribute, the placeholder element is fades away when the image loads. </div> </template> </demo-snippet> <h3> Use the <code>placeholder</code> attribute to specify a background image for the placeholder element. </h3> <demo-snippet class="centered-demo"> <template> <style is="custom-style"> .example.preload-image iron-image { width: 150px; height: 150px; background: #ddd; } </style> <div class="example preload-image"> <button onclick="load('example-preload-image-1')"> Load image </button> <br> <iron-image preload placeholder="./loading.png" id="example-preload-image-1" alt="The Polymer logo." class="sized" sizing="contain"></iron-image> <br> (without <code>fade</code> attribute) </div> <div class="example preload-image"> <button onclick="load('example-preload-image-2')"> Load image </button> <br> <iron-image preload placeholder="./loading.png" fade id="example-preload-image-2" alt="The Polymer logo." class="sized" sizing="contain"></iron-image> <br> (with <code>fade</code> attribute) </div> </template> </demo-snippet> </div> </body>
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