css/css-cascade/layer-basic.html

<!DOCTYPE html>
<html>
<head>
<title>CSS Cascade Layers: Basic functionality</title>
<meta name="assert" content="Basic functionality of CSS Cascade Layers">
<link rel="author" title="Antti Koivisto" href="mailto:antti@apple.com">
<link rel="help" href="https://www.w3.org/TR/css-cascade-5/#layering">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<target class="first"></target>
<target class="second"></target>
<div id="log"></div>
<script>

// 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; }
            }
        `,
    },
];

for (let testCase of testCases) {
    const styleElement = document.createElement('style');
    styleElement.textContent = testCase['style'];
    document.head.append(styleElement);

    test(function () {
        var targets = document.querySelectorAll('target');
        for (target of targets)
            assert_equals(window.getComputedStyle(target).color, 'rgb(0, 128, 0)',
                      testCase['title'] + ", target '" + target.classList[0] + "'");
    }, testCase['title']);

    styleElement.remove();
}
</script>
</body>
</html>