<!DOCTYPE html><!-- webkit-test-runner [ enableCSSAnimationsAndCSSTransitionsBackedByWebAnimations=true ] -->

<html>
<head>
    <title>Tests that an element with an animation whose keyframes affect stacking context creates stacking context throughout the animation.</title>
    <style>
        .box {
            position: absolute;
            top: 0;
            left: 0;
            height: 100px;
            width: 100px;
        }

        #animating {
            animation: move 2s 1;
            background-color: orange;
        }

        @keyframes move {
            from { z-index: 1; }
            10%  { z-index: auto; }
            90%  { z-index: auto; }
            to   { z-index: 2; }
        }

        .behind {
            background-color: blue;
            top: 25px;
            left: 50px;
            z-index: 1;
        }

        .front {
            top: 50px;
            left: 25px;
            background-color: green;
            z-index: 2;
        }
        
        #result {
            opacity: 0;
        }
    </style>
    <script src="resources/animation-test-helpers.js" type="text/javascript"></script>
    <script type="text/javascript">
        const expectedValues = [
            // [animation-name, time, element-id, property, expected-value, tolerance]
            ["move", 0.5, "animating", "z-index", 0, 0],
        ];

        var doPixelTest = true;
        var disablePauseAPI = false;
        runAnimationTest(expectedValues, null, undefined, disablePauseAPI, doPixelTest);
    </script>
</head>
<body>

<div class="behind box"></div>
<div id="animating" class="box">
    <div class="front box"></div>
</div>
<div id="result"></div>
</body>
</html>