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39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. 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-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget
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description: >
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If "construct" trap is null or undefined, [[Construct]] call is
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properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
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info: |
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[[Construct]] ( argumentsList, newTarget )
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[...]
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4. Let target be O.[[ProxyTarget]].
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5. Assert: IsConstructor(target) is true.
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6. Let trap be ? GetMethod(handler, "construct").
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7. If trap is undefined, then
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a. Return ? Construct(target, argumentsList, newTarget).
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features: [class, Proxy, Reflect, Reflect.construct]
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includes: [compareArray.js]
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---*/
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var ArrayTarget = new Proxy(Array, {});
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var ArrayProxy = new Proxy(ArrayTarget, {});
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var array = new ArrayProxy(1, 2, 3);
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assert(Array.isArray(array));
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assert.compareArray(array, [1, 2, 3]);
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class MyArray extends Array {
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get isMyArray() {
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return true;
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}
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}
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var myArray = Reflect.construct(ArrayProxy, [], MyArray);
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assert(Array.isArray(myArray));
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assert(myArray instanceof MyArray);
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assert(myArray.isMyArray);
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