forked from mirrors/gecko-dev
0108376e76
Automatic update from web-platform-tests Rename WebIDL to webidl WebIDL is renamed to webidl at up stream. Do this also in chromium to unblock wpt-importer. Wpt-importer should be able to handle such cases in future. Bug: 1247327 Change-Id: Ib9c4ca3f4da55c6a25e56bc730a846b6fa95563b Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3151416 Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org> Commit-Queue: Weizhong Xia <weizhong@google.com> Cr-Commit-Position: refs/heads/main@{#920025} -- wpt-commits: a370aad338d6ed743abb4d2c6ae84a7f1058558c wpt-pr: 30551
26 lines
900 B
HTML
26 lines
900 B
HTML
<!doctype html>
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<meta charset="utf-8">
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<title>instanceof behavior</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<iframe></iframe>
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<script>
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test(function() {
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var obj = Object.create(Element.prototype);
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assert_true(obj instanceof Element);
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assert_true(obj instanceof Node);
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assert_false(obj instanceof Attr);
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}, "Manually-constructed prototype chains are correctly handled by instanceof");
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test(() => {
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// This tests that the historical override of [[HasInstance]] was removed:
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// https://github.com/heycam/webidl/pull/356
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assert_false(document.body instanceof frames[0].Element);
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}, "instanceof must return false across different globals, for platform objects");
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test(() => {
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assert_false(EventTarget.hasOwnProperty(Symbol.hasInstance));
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}, "platform objects do not have Symbol.hasInstance installed");
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</script>
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