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Issue 1581713003: [third_party] add polymer 1.2.3 (Closed) Base URL: https://chromium.googlesource.com/infra/third_party/npm_modules.git@master
Patch Set: 1.2.3 Created 4 years, 11 months ago
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1
2 <!---
3
4 This README is automatically generated from the comments in these files:
5 iron-image.html
6
7 Edit those files, and our readme bot will duplicate them over here!
8 Edit this file, and the bot will squash your changes :)
9
10 -->
11
12 [![Build Status](https://travis-ci.org/PolymerElements/iron-image.svg?branch=mas ter)](https://travis-ci.org/PolymerElements/iron-image)
13
14 _[Demo and API Docs](https://elements.polymer-project.org/elements/iron-image)_
15
16
17 ##&lt;iron-image&gt;
18
19
20 `iron-image` is an element for displaying an image that provides useful sizing a nd
21 preloading options not found on the standard `<img>` tag.
22
23 The `sizing` option allows the image to be either cropped (`cover`) or
24 letterboxed (`contain`) to fill a fixed user-size placed on the element.
25
26 The `preload` option prevents the browser from rendering the image until the
27 image is fully loaded. In the interim, either the element's CSS `background-col or`
28 can be be used as the placeholder, or the `placeholder` property can be
29 set to a URL (preferably a data-URI, for instant rendering) for an
30 placeholder image.
31
32 The `fade` option (only valid when `preload` is set) will cause the placeholder
33 image/color to be faded out once the image is rendered.
34
35 Examples:
36
37 Basically identical to &lt;img src="..."&gt; tag:
38
39 <iron-image src="http://lorempixel.com/400/400"></iron-image>
40
41 Will letterbox the image to fit:
42
43 <iron-image style="width:400px; height:400px;" sizing="contain"
44 src="http://lorempixel.com/600/400"></iron-image>
45
46 Will crop the image to fit:
47
48 <iron-image style="width:400px; height:400px;" sizing="cover"
49 src="http://lorempixel.com/600/400"></iron-image>
50
51 Will show light-gray background until the image loads:
52
53 <iron-image style="width:400px; height:400px; background-color: lightgray;"
54 sizing="cover" preload src="http://lorempixel.com/600/400"></iron-image>
55
56 Will show a base-64 encoded placeholder image until the image loads:
57
58 <iron-image style="width:400px; height:400px;" placeholder="data:image/gif;b ase64,..."
59 sizing="cover" preload src="http://lorempixel.com/600/400"></iron-image>
60
61 Will fade the light-gray background out once the image is loaded:
62
63 <iron-image style="width:400px; height:400px; background-color: lightgray;"
64 sizing="cover" preload fade src="http://lorempixel.com/600/400"></iron-ima ge>
65
66 Custom property | Description | Default
67 ----------------|-------------|----------
68 `--iron-image-placeholder` | Mixin applied to #placeholder | `{}`
69 `--iron-image-width` | Sets the width of the wrapped image | `auto`
70 `--iron-image-height` | Sets the height of the wrapped image | `auto`
71
72
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