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| 1 <!-- | |
| 2 Copyright (c) 2014 The Polymer Project Authors. All rights reserved. | |
| 3 This code may only be used under the BSD style license found at http://polymer.g
ithub.io/LICENSE.txt | |
| 4 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt | |
| 5 The complete set of contributors may be found at http://polymer.github.io/CONTRI
BUTORS.txt | |
| 6 Code distributed by Google as part of the polymer project is also | |
| 7 subject to an additional IP rights grant found at http://polymer.github.io/PATEN
TS.txt | |
| 8 --><!-- | |
| 9 `core-image` is an element for displaying an image that provides useful sizing a
nd | |
| 10 preloading options not found on the standard `<img>` tag. | |
| 11 | |
| 12 The `sizing` option allows the image to be either cropped (`cover`) or | |
| 13 letterboxed (`contain`) to fill a fixed user-size placed on the element. | |
| 14 | |
| 15 The `preload` option prevents the browser from rendering the image until the | |
| 16 image is fully loaded. In the interim, either the element's CSS `background-col
or` | |
| 17 can be be used as the placeholder, or the `placeholder` property can be | |
| 18 set to a URL (preferably a data-URI, for instant rendering) for an | |
| 19 placeholder image. | |
| 20 | |
| 21 The `fade` option (only valid when `preload` is set) will cause the placeholder | |
| 22 image/color to be faded out once the image is rendered. | |
| 23 | |
| 24 Examples: | |
| 25 | |
| 26 Basically identical to <img src="..."> tag: | |
| 27 | |
| 28 <core-image src="http://lorempixel.com/400/400"></core-image> | |
| 29 | |
| 30 Will letterbox the image to fit: | |
| 31 | |
| 32 <core-image style="width:400px; height:400px;" sizing="contain" | |
| 33 src="http://lorempixel.com/600/400"></core-image> | |
| 34 | |
| 35 Will crop the image to fit: | |
| 36 | |
| 37 <core-image style="width:400px; height:400px;" sizing="cover" | |
| 38 src="http://lorempixel.com/600/400"></core-image> | |
| 39 | |
| 40 Will show light-gray background until the image loads: | |
| 41 | |
| 42 <core-image style="width:400px; height:400px; background-color: lightgray;" | |
| 43 sizing="cover" preload src="http://lorempixel.com/600/400"></core-image> | |
| 44 | |
| 45 Will show a base-64 encoded placeholder image until the image loads: | |
| 46 | |
| 47 <core-image style="width:400px; height:400px;" placeholder="data:image/gif;b
ase64,..." | |
| 48 sizing="cover" preload src="http://lorempixel.com/600/400"></core-image> | |
| 49 | |
| 50 Will fade the light-gray background out once the image is loaded: | |
| 51 | |
| 52 <core-image style="width:400px; height:400px; background-color: lightgray;" | |
| 53 sizing="cover" preload fade src="http://lorempixel.com/600/400"></core-ima
ge> | |
| 54 | |
| 55 | |
| 56 @group Polymer Core Elements | |
| 57 @element core-image | |
| 58 @homepage github.io | |
| 59 --><html><head><link rel="import" href="../polymer/polymer.html"> | |
| 60 | |
| 61 </head><body><polymer-element name="core-image" assetpath=""> | |
| 62 <template> | |
| 63 <link rel="stylesheet" href="core-image.css"> | |
| 64 <template if="{{!sizing}}"> | |
| 65 <img id="img"> | |
| 66 </template> | |
| 67 <template if="{{preload && fade}}"> | |
| 68 <div id="placeholder" fit=""></div> | |
| 69 </template> | |
| 70 <content></content> | |
| 71 </template> | |
| 72 | |
| 73 </polymer-element> | |
| 74 <script charset="utf-8" src="core-image-extracted.js"></script></body></html> | |
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Chromium Code Reviews
Issue 1215543002:
Remove Polymer 0.5. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master