blob: 6f5ffd17eadf336fc1dd703ab80d504324b3689b [file] [log] [blame]
<!DOCTYPE html>
<title>CSS Variables - Animation - From and To Values</title>
<meta rel="author" title="Kevin Babbitt">
<meta rel="author" title="Greg Whitworth">
<link rel="author" title="Microsoft Corporation" href="" />
<link rel="help" href="">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
@keyframes valueanim
to { --value: green; }
/* Start the animation in the paused state and fill at both ends so we can inspect values from both keyframes. */
animation-name: valueanim;
animation-duration: 1s;
animation-play-state: paused;
animation-fill-mode: both;
--value: blue;
#target span
color: var(--value);
<div id="target"><span>This text should animate from blue to green over a period of 1 second.</span></div>
<script type="text/javascript">
"use strict";
// Force an initial layout pass
test(function() {
assert_equals(window.getComputedStyle(document.getElementById("target")).getPropertyValue("--value").trim(), "blue", "--value is blue before animation runs");
}, "Verify CSS variable value before animation");
var animationTest = async_test("Verify CSS variable value after animation");
animationTest.step(function() {
// Set event handler
document.getElementById("target").addEventListener("animationend", animationTest.step_func(function() {
assert_equals(window.getComputedStyle(document.getElementById("target")).getPropertyValue("--value").trim(), "green", "--value is green after animation runs")
// Trigger animation
document.getElementById("target").style.animationPlayState = "running";