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third_party/polymer/components/paper-button/README.md

 
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-[![Build Status](https://travis-ci.org/PolymerElements/paper-button.svg?branch=master)](https://travis-ci.org/PolymerElements/paper-button)
+[![Build status](https://travis-ci.org/PolymerElements/paper-button.svg?branch=master)](https://travis-ci.org/PolymerElements/paper-button)
 
-_[Demo and API Docs](https://elements.polymer-project.org/elements/paper-button)_
+_[Demo and API docs](https://elements.polymer-project.org/elements/paper-button)_
 
 
 ##&lt;paper-button&gt;
 
-
 Material design: [Buttons](https://www.google.com/design/spec/components/buttons.html)
 
 `paper-button` is a button. When the user touches the button, a ripple effect emanates
 from the point of contact. It may be flat or raised. A raised button is styled with a
 shadow.
 
 Example:
 
-    <paper-button>Flat button</paper-button>
-    <paper-button raised>Raised button</paper-button>
-    <paper-button noink>No ripple effect</paper-button>
-    <paper-button toggles>Toggle-able button</paper-button>
+```html
+<paper-button>Flat button</paper-button>
+<paper-button raised>Raised button</paper-button>
+<paper-button noink>No ripple effect</paper-button>
+<paper-button toggles>Toggle-able button</paper-button>
+```
 
 A button that has `toggles` true will remain `active` after being clicked (and
 will have an `active` attribute set). For more information, see the `Polymer.IronButtonState`
 behavior.
 
 You may use custom DOM in the button body to create a variety of buttons. For example, to
 create a button with an icon and some text:
 
-    <paper-button>
-      <iron-icon icon="favorite"></iron-icon>
-      custom button content
-    </paper-button>
+```html
+<paper-button>
+  <iron-icon icon="favorite"></iron-icon>
+  custom button content
+</paper-button>
+```
+
+To use `paper-button` as a link, wrap it in an anchor tag. Since `paper-button` will already
+receive focus, you may want to prevent the anchor tag from receiving focus as well by setting
+its tabindex to -1.
+
+```html
+<a href="https://www.polymer-project.org/" tabindex="-1">
+  <paper-button raised>Polymer Project</paper-button>
+</a>
+```
 
 ### Styling
 
 Style the button with CSS as you would a normal DOM element.
 
-    paper-button.fancy {
-      background: green;
-      color: yellow;
-    }
+```css
+paper-button.fancy {
+  background: green;
+  color: yellow;
+}
 
-    paper-button.fancy:hover {
-      background: lime;
-    }
+paper-button.fancy:hover {
+  background: lime;
+}
 
-    paper-button[disabled],
-    paper-button[toggles][active] {
-      background: red;
-    }
+paper-button[disabled],
+paper-button[toggles][active] {
+  background: red;
+}
+```
 
 By default, the ripple is the same color as the foreground at 25% opacity. You may
 customize the color using the `--paper-button-ink-color` custom property.
 
 The following custom properties and mixins are also available for styling:
 
-Custom property | Description | Default
-----------------|-------------|----------
-`--paper-button-ink-color` | Background color of the ripple | `Based on the button's color`
-`--paper-button` | Mixin applied to the button | `{}`
-`--paper-button-disabled` | Mixin applied to the disabled button. Note that you can also use the `paper-button[disabled]` selector | `{}`
-`--paper-button-flat-keyboard-focus` | Mixin applied to a flat button after it's been focused using the keyboard | `{}`
-`--paper-button-raised-keyboard-focus` | Mixin applied to a raised button after it's been focused using the keyboard | `{}`
+| Custom property | Description | Default |
+| --- | --- | --- |
+| `--paper-button-ink-color` | Background color of the ripple | `Based on the button's color` |
+| `--paper-button` | Mixin applied to the button | `{}` |
+| `--paper-button-disabled` | Mixin applied to the disabled button. Note that you can also use the `paper-button[disabled]` selector | `{}` |
+| `--paper-button-flat-keyboard-focus` | Mixin applied to a flat button after it's been focused using the keyboard | `{}` |
+| `--paper-button-raised-keyboard-focus` | Mixin applied to a raised button after it's been focused using the keyboard | `{}` |