third_party/polymer/v1_0/components-chromium/iron-icon/README.md

<!---

This README is automatically generated from the comments in these files:
iron-icon.html

Edit those files, and our readme bot will duplicate them over here!
Edit this file, and the bot will squash your changes :)

The bot does some handling of markdown. Please file a bug if it does the wrong
thing! https://github.com/PolymerLabs/tedium/issues

-->

[![Build status](https://travis-ci.org/PolymerElements/iron-icon.svg?branch=master)](https://travis-ci.org/PolymerElements/iron-icon)

_[Demo and API docs](https://elements.polymer-project.org/elements/iron-icon)_


##&lt;iron-icon&gt;

The `iron-icon` element displays an icon. By default an icon renders as a 24px square.

Example using src:

```html
<iron-icon src="star.png"></iron-icon>
```

Example setting size to 32px x 32px:

```html
<iron-icon class="big" src="big_star.png"></iron-icon>

<style is="custom-style">
  .big {
    --iron-icon-height: 32px;
    --iron-icon-width: 32px;
  }
</style>
```

The iron elements include several sets of icons.
To use the default set of icons, import `iron-icons.html` and use the `icon` attribute to specify an icon:

```html
<link rel="import" href="/components/iron-icons/iron-icons.html">

<iron-icon icon="menu"></iron-icon>
```

To use a different built-in set of icons, import the specific `iron-icons/<iconset>-icons.html`, and
specify the icon as `<iconset>:<icon>`. For example, to use a communication icon, you would
use:

```html
<link rel="import" href="/components/iron-icons/communication-icons.html">

<iron-icon icon="communication:email"></iron-icon>
```

You can also create custom icon sets of bitmap or SVG icons.

Example of using an icon named `cherry` from a custom iconset with the ID `fruit`:

```html
<iron-icon icon="fruit:cherry"></iron-icon>
```

See [iron-iconset](iron-iconset) and [iron-iconset-svg](iron-iconset-svg) for more information about
how to create a custom iconset.

See the [iron-icons demo](iron-icons?view=demo:demo/index.html) to see the icons available
in the various iconsets.

To load a subset of icons from one of the default `iron-icons` sets, you can
use the [poly-icon](https://poly-icon.appspot.com/) tool. It allows you
to select individual icons, and creates an iconset from them that you can
use directly in your elements.

### Styling

The following custom properties are available for styling:

| Custom property | Description | Default |
| --- | --- | --- |
| `--iron-icon-width` | Width of the icon | `24px` |
| `--iron-icon-height` | Height of the icon | `24px` |
| `--iron-icon-fill-color` | Fill color of the svg icon | `currentcolor` |
| `--iron-icon-stroke-color` | Stroke color of the svg icon | none |