trap-is-undefined-target-is-proxy.js (1168B)
1 // Copyright (C) 2020 Alexey Shvayka. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 esid: sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver 6 description: > 7 If "get" trap is null or undefined, [[Get]] call is properly 8 forwarded to [[ProxyTarget]] (which is also a Proxy object). 9 info: | 10 [[Get]] ( P, Receiver ) 11 12 [...] 13 5. Let target be O.[[ProxyTarget]]. 14 6. Let trap be ? GetMethod(handler, "get"). 15 7. If trap is undefined, then 16 a. Return ? target.[[Get]](P, Receiver). 17 features: [Proxy] 18 includes: [compareArray.js] 19 ---*/ 20 21 var plainObject = { 22 get 0() { 23 return 1; 24 }, 25 foo: 2, 26 set bar(_value) {}, 27 }; 28 29 var plainObjectTarget = new Proxy(plainObject, {}); 30 var plainObjectProxy = new Proxy(plainObjectTarget, { 31 get: undefined, 32 }); 33 34 assert.sameValue(Object.create(plainObjectProxy)[0], 1); 35 assert.sameValue(plainObjectProxy.foo, 2); 36 assert.sameValue(plainObjectProxy.bar, undefined); 37 38 39 var array = [1, 2, 3]; 40 var arrayTarget = new Proxy(array, {}); 41 var arrayProxy = new Proxy(arrayTarget, { 42 get: undefined, 43 }); 44 45 assert.compareArray(arrayProxy, array); 46 47 reportCompare(0, 0);