<!DOCTYPE html>
<meta charset=utf-8>
<style>
    @keyframes animation {
        to { margin-left: 100px }
    }
</style>
<body>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script>

'use strict';

async_test(t => {
    const target = document.body.appendChild(document.createElement("div"));
    target.style.animation = "animation 10ms forwards";

    target.addEventListener("animationend", () => {
        assert_equals(getComputedStyle(target).marginLeft, "100px", "The target element has style values from the final keyframe of its animation.");
        target.style.animation = "none";
        assert_equals(getComputedStyle(target).marginLeft, "0px", "The target element has no animation after setting 'animation-name: none'.");
        t.done();
    });
}, "Setting 'animation-name: none' after a 'fill: forwards' animation has completed reverts to the unanimated style.");

</script>
</body>