1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
<!DOCTYPE html>
<title>Custom Functions: ShadowDOM (cache pitfall)</title>
<link rel="help" href="https://drafts.csswg.org/css-mixins-1/#using-custom-functions">
<link rel="help" href="https://drafts.csswg.org/css-scoping-1/#css-tree-scoped-reference">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/utils.js"></script>
<style>
@function --a() { result: 42px; }
</style>
<!-- Should reach --a() defined inside Shadow. -->
<div id=host1>
<template shadowrootmode=open>
<style>
@function --a() {
result: 10px;
}
div {
width: --a();
}
</style>
<div id=target></div>
</template>
</div>
<!--
Should reach --a() defined at document level. Except for tree-scopes,
the matched rules look identical for #host1 and #host2; we must not
hit a cache and cause the same result for both.
-->
<div id=host2>
<template shadowrootmode=open>
<style>
div {
width: --a();
}
</style>
<div id=target></div>
</template>
</div>
<script>
test(() => {
let cs1 = getComputedStyle(host1.shadowRoot.querySelector('#target'));
let cs2 = getComputedStyle(host2.shadowRoot.querySelector('#target'));
assert_equals(cs1.width, '10px');
assert_equals(cs2.width, '42px');
}, 'Tree scope is respected for otherwise identical styles');
</script>
|
