amphtml/examples/anim-worklet.amp.html at master · yieldbot/amphtml · GitHub

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<!--
 * Copyright 2018 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
-->

<!doctype html>
<html amp>
  <head>
    <meta charset="utf-8">
    <link rel="canonical" href="anim-worklet.amp.html">
    <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
    <script async custom-element="amp-animation" src="https://cdn.ampproject.org/v0/amp-animation-0.1.js"></script>
    <script async custom-element="amp-position-observer" src="https://cdn.ampproject.org/v0/amp-position-observer-0.1.js"></script>
    <style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>
    <script async src="https://cdn.ampproject.org/v0.js"></script>

    <style amp-custom>
      html, body {
        margin: 0;
        padding: 0;
        position: relative;
      }
      div {
        position: relative;
        background-color: pink;
        height: 100vh;
        z-index: 9;
      }
      #target {
        position: relative;
        height: 60vh;
        background-size: cover;
        margin-top: -30vh;
        z-index: 0;
      }
    </style>
  </head>
  <body>
    <amp-animation id="anim1" layout="nodisplay">
        <script type="application/json">
          {
          "duration": "2s",
          "fill": "both",
          "direction": "alternate",
          "animations": [
            {
              "selector": "#target",
              "keyframes": [
                { "transform": "translateY(0)" },
                { "transform": "translateY(30vh)" }
              ]
            }
          ]
        }
        </script>
      </amp-animation>
      <div></div>
      <div id="target">
        <amp-position-observer
          intersection-ratios="1"
          on="scroll:anim1.seekTo(percent=event.percent)"
          layout="nodisplay">
        </amp-position-observer>
        <amp-img layout=responsive width=411 height=411 src="https://placekitten.com/g/4000/4000"></amp-img>
      </div>
      <div></div>
  </body>
</html>