wpt/css/css-variables/variable-animation-substitute-within-keyframe-fallback.html at master · web-platform-tests/wpt · GitHub

Name: wpt/css/css-variables/variable-animation-substitute-within-keyframe-fallback.html at master · web-platform-tests/wpt · GitHub
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<!DOCTYPE html>
<html>
<head>
<title>CSS Variables - Animation - Substitute Within Keyframe - Fallback</title>
<scriptsrc="/resources/testharness.js"></script>
<scriptsrc="/resources/testharnessreport.js"></script>

<metarel="author" title="Kevin Babbitt">
<metarel="author" title="Greg Whitworth">
<linkrel="author" title="Microsoft Corporation" href="http://microsoft.com" />
<linkrel="help" href="http://www.w3.org/TR/css-variables-1/#syntax">
<linkrel="help" href="http://www.w3.org/TR/css-variables-1/#using-variables">
<metaname="assert" content='The --endColor does the 50% flip and supports the fallback syntax'>

<style>
@keyframes coloranim
 {
from { color: blue; }
to { --endColor:var(--nonexistent, green); color:var(--endColor); }
 }

/* Start the animation in the paused state and fill at both ends so we can inspect values from both keyframes. */
#target
 {
animation-name: coloranim;
animation-duration:1s;
animation-play-state: paused;
animation-fill-mode: both;
 }
#target
 {
color: red;
--endColor: red;
 }
</style>
</head>
<body>

<divid="target">This text should animate from blue to green over a period of 1 second.</div>

<scripttype="text/javascript">
"use strict";

// Force an initial layout pass
document.documentElement.offsetHeight;

test(function(){
// Different browsers generate interpolated colors differently, so check multiple valid forms.
assert_in_array(window.getComputedStyle(document.getElementById("target")).getPropertyValue("color").trim(),
["rgb(0, 0, 255)","rgba(0, 0, 255, 1)"],
"color is blue before animation runs");
},"Verify color before animation");

varanimationTest=async_test("Verify color after animation");

animationTest.step(function(){
// Set event handler
document.getElementById("target").addEventListener("animationend",animationTest.step_func(function(){
assert_in_array(window.getComputedStyle(document.getElementById("target")).getPropertyValue("color").trim(),
["rgb(0, 128, 0)","rgba(0, 128, 0, 1)"],
"color is green after animation runs")
animationTest.done();
}));

// Trigger animation
document.getElementById("target").style.animationPlayState="running";
});
</script>

</body>
</html>