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89 lines
5.1 KiB
HTML
89 lines
5.1 KiB
HTML
<!DOCTYPE HTML>
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<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api/#dom-propertydescriptor-inherits" />
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<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api/#register-a-custom-property" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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#outer {
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--inherited-length-1: 10px;
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--inherited-length-2: var(--non-inherited-length-1);
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--inherited-length-3: 30px;
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--non-inherited-length-1: 22px;
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--non-inherited-length-3: calc(var(--non-inherited-length-2) * 10);
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}
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#inner {
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--inherited-length-3: 15px;
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--non-inherited-length-1: 40px;
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--non-inherited-length-2: 90px;
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}
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</style>
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<div id=outer><div id=inner></div></div>
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<script>
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test(function() {
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CSS.registerProperty({name: '--inherited-length-1', syntax: '<length>', initialValue: '1px', inherits: true});
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CSS.registerProperty({name: '--inherited-length-2', syntax: '<length>', initialValue: '2px', inherits: true});
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CSS.registerProperty({name: '--inherited-length-3', syntax: '<length>', initialValue: '3px', inherits: true});
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CSS.registerProperty({name: '--non-inherited-length-1', syntax: '<length>', initialValue: '4px', inherits: false});
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CSS.registerProperty({name: '--non-inherited-length-2', syntax: '<length>', initialValue: '5px', inherits: false});
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CSS.registerProperty({name: '--non-inherited-length-3', syntax: '<length>', initialValue: '6px', inherits: false});
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outerComputedStyle = getComputedStyle(outer);
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assert_equals(outerComputedStyle.getPropertyValue('--inherited-length-1'), '10px');
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assert_equals(outerComputedStyle.getPropertyValue('--inherited-length-2'), '22px');
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assert_equals(outerComputedStyle.getPropertyValue('--inherited-length-3'), '30px');
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assert_equals(outerComputedStyle.getPropertyValue('--non-inherited-length-1'), '22px');
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assert_equals(outerComputedStyle.getPropertyValue('--non-inherited-length-2'), '5px');
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assert_equals(outerComputedStyle.getPropertyValue('--non-inherited-length-3'), '50px');
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innerComputedStyle = getComputedStyle(inner);
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assert_equals(innerComputedStyle.getPropertyValue('--inherited-length-1'), '10px');
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assert_equals(innerComputedStyle.getPropertyValue('--inherited-length-2'), '22px');
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assert_equals(innerComputedStyle.getPropertyValue('--inherited-length-3'), '15px');
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assert_equals(innerComputedStyle.getPropertyValue('--non-inherited-length-1'), '40px');
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assert_equals(innerComputedStyle.getPropertyValue('--non-inherited-length-2'), '90px');
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assert_equals(innerComputedStyle.getPropertyValue('--non-inherited-length-3'), '6px');
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}, "Registered properties are correctly inherited (or not) depending on the inherits flag.");
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test(function(){
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CSS.registerProperty({name: '--initial-length-1', syntax: '<length>', initialValue: '0px', inherits: false});
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outer.style = '--initial-length-1: notalength';
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inner.style = '--initial-length-1: inherit';
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assert_equals(getComputedStyle(inner).getPropertyValue('--initial-length-1'), '0px');
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}, "Explicitly inheriting from a parent with an invalid value results in initial value.");
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test(function(){
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CSS.registerProperty({name: '--initial-length-2', syntax: '<length>', initialValue: '0px', inherits: false});
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inner.style = '--initial-length-2: inherit';
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assert_equals(getComputedStyle(inner).getPropertyValue('--initial-length-2'), '0px');
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}, "Explicitly inheriting from a parent with no value results in initial value.");
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test(function(){
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CSS.registerProperty({name: '--inherited-length-4', syntax: '<length>', initialValue: '0px', inherits: true});
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outer.style = '--inherited-length-4: 42px';
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inner.style = '--inherited-length-4: var(--undefined)';
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assert_equals(getComputedStyle(inner).getPropertyValue('--inherited-length-4'), '42px');
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}, "Reference to undefined variable results in inherited value");
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test(function(){
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CSS.registerProperty({name: '--inherited-length-5', syntax: '<length>', initialValue: '0px', inherits: true});
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outer.style = '--inherited-length-5: 42px';
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inner.style = '--incompatible: nolength; --inherited-length-5: var(--incompatible)';
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assert_equals(getComputedStyle(inner).getPropertyValue('--inherited-length-5'), '42px');
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}, "Reference to syntax-incompatible variable results in inherited value");
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test(function(){
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CSS.registerProperty({name: '--inherited-em', syntax: '<length>', initialValue: '0px', inherits: true});
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outer.style = 'font-size: 11px; --inherited-em: 10em;';
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inner.style = 'font-size: 22px; --unregistered:var(--inherited-em);';
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assert_equals(getComputedStyle(inner).getPropertyValue('--unregistered'), '110px');
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}, "Font-relative units are absolutized before before inheritance");
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test(function(){
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CSS.registerProperty({name: '--calc-length', syntax: '<length>', initialValue: '0px', inherits: true});
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outer.style = '--calc-length: calc(10px + 10px);';
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inner.style = '--unregistered:var(--calc-length);';
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assert_equals(getComputedStyle(inner).getPropertyValue('--unregistered'), '20px');
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}, "Calc expressions are resolved before inheritance");
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</script>
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