using-host-with-pseudo-classes.html

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<!--
# Using `:host` with CSS pseudo classes

Shows how to use `:host` with pseudo classes to react to different user-driven
states.

In the definition of `<my-element>` below, `:host` is used with the
`:hover` pseudo class.

    :host(:hover) {
      opacity: 0.5;
    }

When a user hovers over `<my-element>`, its opacity changes.

[jsbin](http://jsbin.com/juwujodalo/2/edit)
-->

<link rel="import" href="../../components/polymer/polymer.html">

<polymer-element name="my-element" noscript>
  <template>
    <style>
      :host {
        /* Note: by default elements are always display:inline. */
        display: block;
      }
      :host(:hover) {
        opacity: 0.5;
      }
    </style>
    <p>Hover over me</p>
  </template>
</polymer-element>