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c6dd620ad3
Corresponds to https://github.com/tc39/proposal-weakrefs/pull/183 (Note, this is untested)
31 lines
1.1 KiB
JavaScript
31 lines
1.1 KiB
JavaScript
// Copyright (C) 2019 Leo Balter. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-finalization-registry-target
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description: Instances of FinalizationRegistry are extensible
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info: |
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FinalizationRegistry ( cleanupCallback )
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...
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3. Let finalizationRegistry be ? OrdinaryCreateFromConstructor(NewTarget, "%FinalizationRegistryPrototype%", « [[Realm]], [[CleanupCallback]], [[Cells]], [[IsFinalizationRegistryCleanupJobActive]] »).
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...
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9. Return finalizationRegistry.
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OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
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...
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2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
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3. Return ObjectCreate(proto, internalSlotsList).
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ObjectCreate ( proto [ , internalSlotsList ] )
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4. Set obj.[[Prototype]] to proto.
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5. Set obj.[[Extensible]] to true.
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6. Return obj.
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features: [FinalizationRegistry]
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---*/
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var finalizationRegistry = new FinalizationRegistry(function() {});
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assert.sameValue(Object.isExtensible(finalizationRegistry), true);
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