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<!DOCTYPE html>
<!-- Adapted from https://wpt.live/css/css-cascade/layer-basic.html
and https://wpt.live/css/css-cascade/layer-important.html -->
<target class="first"></target>
<target class="second"></target>
<script src="../include.js"></script>
<script>
test(() => {
// In all test cases, the rule specified as "color: green" should win.
var testCases = [
{
title: 'A1 Anonymous layers',
style: `
@layer { }
target { color: green; }
`,
},
{
title: 'A2 Anonymous layers',
style: `
target { color: green; }
@layer {
target { color: red; }
}
`,
},
{
title: 'A3 Anonymous layers',
style: `
@layer {
target { color: red; }
}
target { color: green; }
`,
},
{
title: 'A4 Anonymous layers',
style: `
@layer {
target { color: red; }
}
@layer {
target { color: green; }
}
`,
},
{
title: 'A5 Anonymous layers',
style: `
@layer {
target { color: green; }
@layer {
target { color: red; }
}
}
`,
},
{
title: 'A6 Anonymous layers',
style: `
@layer {
@layer {
target { color: red; }
}
target { color: green; }
}
`,
},
{
title: 'A7 Anonymous layers',
style: `
@layer {
@layer {
target { color: red; }
}
target { color: red; }
}
@layer {
@layer {
target { color: red; }
}
target { color: green; }
}
`,
},
{
title: 'A8 Anonymous layers',
style: `
@layer {
@layer {
@layer {
target { color: red; }
}
}
target { color: red; }
}
@layer {
@layer {
target { color: red; }
}
target { color: green; }
}
`,
},
{
title: 'A9 Anonymous layers',
style: `
@layer {
@layer {
target { color: red; }
}
target { color: red; }
}
@layer {
@layer {
@layer {
target { color: red; }
}
}
target { color: green; }
}
`,
},
{
title: 'B1 Named layers',
style: `
@layer A {
}
target { color: green; }
`,
},
{
title: 'B2 Named layers',
style: `
@layer A {
target { color: red; }
}
target { color: green; }
`,
},
{
title: 'B3 Named layers',
style: `
@layer A {
target { color: red; }
}
@layer A {
target { color: green; }
}
`,
},
{
title: 'B4 Named layers',
style: `
@layer A {
target { color: red; }
}
@layer B {
target { color: green; }
}
@layer A {
target { color: red; }
}
`,
},
{
title: 'B5 Named layers',
style: `
@layer A {
target { color: green; }
@layer A {
target { color: red; }
}
}
`,
},
{
title: 'B6 Named layers',
style: `
@layer A {
@layer A {
target { color: red; }
}
}
@layer A {
@layer A {
target { color: green; }
}
}
`,
},
{
title: 'B7 Named layers',
style: `
@layer A {
target { color: red; }
@layer A {
target { color: red; }
}
}
@layer B {
target { color: green; }
}
@layer A {
@layer A {
target { color: red; }
}
}
`,
},
{
title: 'B8 Named layers',
style: `
@layer A {
@layer A {
target { color: red; }
}
}
@layer B {
@layer A {
target { color: green; }
}
}
`,
},
{
title: 'B9 Named layers',
style: `
@layer A {
@layer A {
target { color: red; }
}
}
@layer B {
@layer A {
target.first { color: green; }
}
}
@layer A {
@layer A {
target.first { color: red; }
target.second { color: green; }
}
}
`,
},
{
title: 'B10 Named layers',
style: `
@layer A {
@layer A {
target { color: red; }
}
}
@layer B {
@layer A {
target.first { color: green; }
}
}
@layer A {
@layer B {
target.first { color: red; }
target.second { color: green; }
}
}
`,
},
{
title: 'C1 Named layers shorthand',
style: `
@layer A.A {
target { color: red; }
}
@layer B.A {
target { color: green; }
}
`,
},
{
title: 'C2 Named layers shorthand',
style: `
@layer A.A {
target { color: red; }
}
@layer B.A {
target.first { color: green; }
}
@layer A.A {
target.first { color: red; }
target.second { color: green; }
}
`,
},
{
title: 'C3 Named layers shorthand',
style: `
@layer A.A {
target { color: red; }
}
@layer B.A {
target.first { color: green; }
}
@layer A.B {
target.first { color: red; }
target.second { color: green; }
}
`,
},
{
title: 'C4 Named layers shorthand',
style: `
@layer A {
@layer A {
target { color: red; }
}
}
@layer B.A {
target { color: green; }
}
@layer A.A
target { color: red; }
}
`,
},
{
title: 'C5 Named layers shorthand',
style: `
@layer A {
@layer A {
target { color: red; }
}
}
@layer B.A {
target { color: green; }
}
@layer A.B {
target { color: red; }
}
`,
},
{
title: 'D1 Mixed named and anonymous layers',
style: `
@layer A {
target { color: red; }
}
@layer {
target { color: green; }
}
`,
},
{
title: 'D2 Mixed named and anonymous layers',
style: `
@layer A {
@layer {
target { color: red; }
}
}
@layer A {
target { color: green; }
}
`,
},
{
title: 'D3 Mixed named and anonymous layers',
style: `
@layer A {
@layer {
target { color: red; }
}
}
@layer A {
@layer {
target { color: green; }
}
}
`,
},
{
title: 'D4 Mixed named and anonymous layers',
style: `
@layer A {
@layer {
target { color: red; }
}
}
@layer {
target { color: green; }
}
@layer A {
@layer {
target { color: red; }
}
}
`,
},
{
title: 'D5 Mixed named and anonymous layers',
style: `
@layer {
@layer A {
target { color: red; }
}
}
@layer {
target { color: green; }
}
`,
},
{
title: 'E1 Statement syntax',
style: `
@layer A, B, C;
@layer A {
target.first { color: red; }
target.second { color: red; }
}
@layer B {
target.first { color: red; }
}
@layer C {
target.first { color: green; }
target.second { color: green; }
}
`,
},
{
title: 'E2 Statement syntax',
style: `
@layer A, C, B;
@layer A {
target.first { color: red; }
target.second { color: red; }
}
@layer B {
target.first { color: green; }
}
@layer C {
target.first { color: red; }
target.second { color: green; }
}
`,
},
{
title: 'E3 Statement syntax',
style: `
@layer C, B, A;
@layer A {
target.first { color: green; }
target.second { color: green; }
}
@layer B {
target.first { color: red; }
}
@layer C {
target.first { color: red; }
target.second { color: red; }
}
`,
},
{
title: 'E4 Statement syntax',
style: `
@layer B, A.B, A.A;
@layer A {
@layer A {
target.first { color: green; }
}
@layer B {
target.first { color: red; }
target.second { color: green; }
}
}
@layer B {
target { color: red; }
}
`,
},
{
title: 'E5 Statement syntax',
style: `
@layer A.B, B, A.A;
@layer A {
@layer A {
target.first { color: red; }
}
@layer B {
target.first { color: red; }
target.second { color: red; }
}
}
@layer B {
target { color: green; }
}
`,
},
{
title: 'I.A1 Unlayered !important style',
style: `
target { color: green !important; }
target { color: red; }
`
},
{
title: 'I.B1 Same specificity, layered !important first',
style: `
@layer { target { color: green !important; } }
target { color: red; }
`,
},
{
title: 'I.C1 Same specificity, layered !important second',
style: `
target { color: red; }
@layer { target { color: green !important; } }
`,
},
{
title: 'I.D1 Same specificity, all !important',
style: `
@layer { target { color: green !important; } }
@layer { target { color: red !important; } }
target { color: red !important; }
`,
},
{
title: 'I.D2 Same specificity, all !important',
style: `
@layer { target { color: green !important; } }
target { color: red !important; }
@layer { target { color: red !important; } }
`,
},
{
title: 'I.D3 Same specificity, all !important',
style: `
target { color: red !important; }
@layer { target { color: green !important; } }
@layer { target { color: red !important; } }
`,
},
{
title: 'I.D4 Same specificity, all !important',
style: `
@layer A, B;
@layer B { target { color: red !important; } }
@layer A { target { color: green !important; } }
target { color: red !important; }
`,
},
{
title: 'I.E1 Different specificity, all !important',
style: `
@layer { target { color: green !important; } }
@layer { target { color: red !important; } }
target.first { color: red !important; }
`,
},
{
title: 'I.E2 Different specificity, all !important',
style: `
@layer { target { color: green !important; } }
@layer { target.first { color: red !important; } }
target { color: red !important; }
`,
},
];
for (let testCase of testCases) {
const styleElement = document.createElement('style');
styleElement.textContent = testCase['style'];
document.head.append(styleElement);
var targets = document.querySelectorAll('target');
for (let target of targets) {
let actual = window.getComputedStyle(target).color;
if (actual === 'rgb(0, 128, 0)') {
println(`PASS: ${testCase['title']} (${target.classList[0]} target)`);
} else {
println(`FAIL: ${testCase['title']} (${target.classList[0]} target) - Expected 'rgb(0, 128, 0)', got '${actual}'`);
}
}
styleElement.remove();
}
});
</script>