36 lines
1.7 KiB
HTML
36 lines
1.7 KiB
HTML
<!DOCTYPE html>
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<title>NoModificationAllowedError when mutating read only properties</title>
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<link rel="help" href="https://www.w3.org/TR/cssom-1/#dom-cssstyledeclaration-setpropertyvalue">
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<meta name="assert" content="This test verifies that NoModificationAllowedError is thrown when mutating read only properties" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<body></body>
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<script>
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test(function(t) {
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assert_equals(document.defaultView.getComputedStyle(document.body, null).parentRule, null);
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}, "Computed style parent (should be null)");
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test(function(t) {
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assert_throws_dom("NoModificationAllowedError", function() {
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document.defaultView.getComputedStyle(document.body, null).color = "blue";
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});
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}, "Exception thrown when trying to change a computed style declaration via property");
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test(function(t) {
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assert_throws_dom("NoModificationAllowedError", function() {
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document.defaultView.getComputedStyle(document.body, null).setProperty("color", "blue");
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});
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}, "Exception thrown when trying to change a computed style declaration via setProperty");
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test(function(t) {
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assert_throws_dom("NoModificationAllowedError", function() {
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document.defaultView.getComputedStyle(document.body, null).webkitTransition = "";
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});
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}, "Exception thrown when trying to change a computed style alias via property");
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test(function(t) {
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assert_throws_dom("NoModificationAllowedError", function() {
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document.defaultView.getComputedStyle(document.body, null).setProperty("webkitTransition", "");
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});
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}, "Exception thrown when trying to change a computed style alias via setProperty");
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</script>
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