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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Multi-column Layout Test: column-gap test animation</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="https://www.w3.org/TR/css-multicol-1/#column-gap">
<link rel="help" href="https://www.w3.org/TR/web-animations-1/#dom-animatable-animate">
<meta name="assert" content="Test checks that column-gap is an animatable property, and that the computed values during the animation are the expected ones.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#multicol {
column-gap: 0px;
}
</style>
<body>
<div id="multicol"></div>
<div id="log"></div>
<script>
test(
function(){
var multicol = document.getElementById("multicol");
assert_equals(getComputedStyle(multicol).columnGap, "0px");
var keyframes = [
{ columnGap: "100px" },
{ columnGap: "200px" }
];
var options = {
duration: 10,
fill: "forwards",
easing: "linear"
};
var player = multicol.animate(keyframes, options);
player.pause();
player.currentTime = 0;
assert_equals(getComputedStyle(multicol).columnGap, "100px");
player.currentTime = 5;
assert_equals(getComputedStyle(multicol).columnGap, "150px");
player.currentTime = 10;
assert_equals(getComputedStyle(multicol).columnGap, "200px");
}, "column-gap property is animatable");
</script>
</body>
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