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DedicatedWorkerGlobalScope is an object with a Global extended
attribute, but does not define any named property getters. This needs to
be handled by setting the prototype chain to:
DedicatedWorkerGlobalScope
^ DedicatedWorkerGlobalScopePrototype
^ WorkerGlobalScopePrototype
(This is different from something like Window, where there is an
intermediate WindowProperties object for named properties.)
Previously, we treated the GlobalMixin object as if it was a simple
prototype object, accidentally setting DedicatedWorkerGlobalScope's
prototype to WorkerGlobalScopePrototype. This caused the expression
self instanceof DedicatedWorkerGlobalScope
to return false inside workers.
This makes us pass many more of the "/xhr/idlharness.any.worker" WPT
tests than before, rather than failing early.
15 lines
434 B
HTML
15 lines
434 B
HTML
<script src="../include.js"></script>
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<script>
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asyncTest(done => {
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const worker = new Worker("DedicatedWorkerGlobalScope-instanceof-worker.js");
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worker.onmessage = function (event) {
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if (event.data.result === true) {
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println("PASS");
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} else {
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println("FAIL");
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}
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done();
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};
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worker.postMessage("run");
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});
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</script>
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