animations/fill-mode.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>Test simple animation with fill modes</title>
  <style type="text/css" media="screen">
    .box {
      position: relative;
      left: 100px;
      top: 10px;
      height: 100px;
      width: 100px;
      -webkit-animation-delay: 0.1s;
      -webkit-animation-duration: 0.1s;
      -webkit-animation-timing-function: linear;
      -webkit-animation-name: anim;
    }
    @-webkit-keyframes anim {
        from { left: 200px; }
        to   { left: 300px; }
    }
    #a {
      background-color: blue;
      -webkit-animation-fill-mode: none;
    }
    #b {
      background-color: red;
      -webkit-animation-fill-mode: backwards;
    }
    #c {
      background-color: green;
      -webkit-animation-fill-mode: forwards;
    }
    #d {
      background-color: yellow;
      -webkit-animation-fill-mode: both;
    }
    #e {
      background-color: #999;
      -webkit-animation-fill-mode: both;
      -webkit-animation-iteration-count: 2;
      -webkit-animation-direction: alternate;
    }
  </style>
  <script type="text/javascript" charset="utf-8">
    const numAnims = 5;
    var animsFinished = 0;
    const allowance = 5;
    const expectedValues = [
      {id: "a", start: 100, end: 100},
      {id: "b", start: 200, end: 100},
      {id: "c", start: 100, end: 300},
      {id: "d", start: 200, end: 300},
      {id: "e", start: 200, end: 200}
    ];
    var result = "";

    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    function animationEnded(event) {
        if (++animsFinished == numAnims) {
            setTimeout(endTest, 0); // this set timeout should be ok in the test environment
                                    // since we're just giving style a chance to resolve
        }
    };

    function endTest() {

        for (var i=0; i < expectedValues.length; i++) {
            var el = document.getElementById(expectedValues[i].id);
            var expectedValue = expectedValues[i].end;
            var realValue = window.getComputedStyle(el).getPropertyCSSValue("left").getFloatValue(CSSPrimitiveValue.CSS_NUMBER);
            if (Math.abs(expectedValue - realValue) < allowance) {
              result += "PASS";
            } else {
              result += "FAIL";
            }
            result += " - end of animation - id: " + expectedValues[i].id + " expected: " + expectedValue + " actual: " + realValue + "<br>";
        }
        document.getElementById('result').innerHTML = result;

        if (window.testRunner)
            testRunner.notifyDone();
    }

    window.onload = function () {
        for (var i=0; i < expectedValues.length; i++) {
            var el = document.getElementById(expectedValues[i].id);
            var expectedValue = expectedValues[i].start;
            var realValue = window.getComputedStyle(el).getPropertyCSSValue("left").getFloatValue(CSSPrimitiveValue.CSS_NUMBER);
            if (Math.abs(expectedValue - realValue) < allowance) {
              result += "PASS";
            } else {
              result += "FAIL";
            }
            result += " - start of animation - id: " + expectedValues[i].id + " expected: " + expectedValue + " actual: " + realValue + "<br>";
        }
        document.addEventListener("webkitAnimationEnd", animationEnded, false);
    };

  </script>
</head>
<body>
This test performs an animation of the left property with four different
fill modes. It animates over 0.1 second with a 0.1 second delay.
It takes snapshots at document load and the end of the animation.
<div id="a" class="box">
  None
</div>
<div id="b" class="box">
  Backwards
</div>
<div id="c" class="box">
  Forwards
</div>
<div id="d" class="box">
  Both
</div>
<div id="e" class="box">
  Both iterating
</div>
<div id="result">
</div>
</body>
</html>