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<!DOCTYPE html>
<html>
<head>
<title>CSS Mixins: Invalidation after CSSOM changes</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
@mixin --m1() {
color: red;
& {
--foo: bar;
}
}
@mixin --m2() {
color: red;
}
#target1 {
@apply --m1;
}
</style>
<style>
#target2 {
@apply --m2;
}
</style>
<style>
@mixin --m3() {
color: green;
}
#target3 {
color: red;
}
</style>
</head>
<body>
<div id="target1">Some text.</div>
<div id="target2">Some text.</div>
<div id="target3">Some text.</div>
<script>
test(() => {
let ss = document.styleSheets[0];
assert_equals(ss.cssRules[0].name, '--m1');
assert_equals(ss.cssRules[0].cssRules.length, 2);
let target = document.getElementById('target1');
assert_equals(getComputedStyle(target).color, 'rgb(255, 0, 0)');
ss.cssRules[0].cssRules[1].style.color = 'green';
assert_equals(ss.cssRules[0].cssText,
`@mixin --m1() {
color: red;
& { --foo: bar; color: green; }
}`);
assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)');
}, 'invalidation of @mixin from same stylesheet');
test(() => {
let ss = document.styleSheets[0];
assert_equals(ss.cssRules[1].name, '--m2');
let target = document.getElementById('target2');
assert_equals(getComputedStyle(target).color, 'rgb(255, 0, 0)');
ss.cssRules[1].cssRules[0].style.color = 'green';
assert_equals(ss.cssRules[1].cssText,
`@mixin --m2() {
color: green;
}`);
assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)');
}, 'invalidation of @mixin from different stylesheet');
test(() => {
let ss = document.styleSheets[2];
let target = document.getElementById('target3');
assert_equals(getComputedStyle(target).color, 'rgb(255, 0, 0)');
ss.cssRules[1].insertRule('@apply --m3;');
assert_equals(ss.cssRules[1].cssText,
`#target3 {
color: red;
@apply --m3;
}`);
assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)');
}, 'invalidation on adding @apply rule');
</script>
</body>
</html>