systrace/catapult/third_party/polymer/components/neon-animation/animations/slide-from-top-animation.html

<!--
@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->

<link rel="import" href="../../polymer/polymer.html">
<link rel="import" href="../neon-animation-behavior.html">
<link rel="import" href="../web-animations.html">

<!--
`<slide-from-top-animation>` animates the transform of an element from `translateY(-100%)` to
`none`. The `transformOrigin` defaults to `50% 0`.

Configuration:
```
{
  name: 'slide-from-top-animation',
  node: <node>,
  transformOrigin: <transform-origin>,
  timing: <animation-timing>
}
```
-->

<script>

  Polymer({

    is: 'slide-from-top-animation',

    behaviors: [
      Polymer.NeonAnimationBehavior
    ],

    configure: function(config) {
      var node = config.node;

      this._effect = new KeyframeEffect(node, [
        {'transform': 'translateY(-100%)'},
        {'transform': 'translateY(0%)'}
      ], this.timingFromConfig(config));

      if (config.transformOrigin) {
        this.setPrefixedProperty(node, 'transformOrigin', config.transformOrigin);
      } else {
        this.setPrefixedProperty(node, 'transformOrigin', '50% 0');
      }

      return this._effect;
    }

  });

</script>