wpt/css/css-variables/variable-reference-perspective-origin.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Variables: perspective-origin with var() references</title>
<link rel="help" href="https://drafts.csswg.org/css-transforms-2/#perspective-origin-property">
<link rel="help" href="https://drafts.csswg.org/css-variables-2/">
<meta name="assert" content="perspective-origin correctly resolves CSS variables in both value positions">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
    .target {
        width: 200px;
        height: 200px;
        perspective: 800px;
    }
</style>
</head>
<body>
<script>
function test_perspective_origin_var(style, expected, description) {
    test(() => {
        const div = document.createElement('div');
        div.className = 'target';
        div.setAttribute('style', style);
        document.body.appendChild(div);
        assert_equals(getComputedStyle(div).perspectiveOrigin, expected);
        div.remove();
    }, description);
}

test_perspective_origin_var(
    '--x: 0%; perspective-origin: var(--x) 50%',
    '0px 100px',
    'var() as first value of perspective-origin'
);

test_perspective_origin_var(
    '--y: 0%; perspective-origin: 50% var(--y)',
    '100px 0px',
    'var() as second value of perspective-origin'
);

test_perspective_origin_var(
    '--x: 10%; --y: 20%; perspective-origin: var(--x) var(--y)',
    '20px 40px',
    'var() as both values of perspective-origin'
);

test_perspective_origin_var(
    '--pos: 25%; perspective-origin: var(--pos) var(--pos)',
    '50px 50px',
    'same var() for both values of perspective-origin'
);

test_perspective_origin_var(
    '--y: top; perspective-origin: 50% var(--y)',
    '100px 0px',
    'var() as second value with keyword'
);

test_perspective_origin_var(
    '--x: left; perspective-origin: var(--x) 50%',
    '0px 100px',
    'var() as first value with keyword'
);
</script>
</body>
</html>