| // Copyright (C) 2019 Alexey Shvayka. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-internalizejsonproperty |
| description: > |
| [[Delete]] does not remove non-configurable properties. |
| If [[Delete]] is unsuccessful, no exception is thrown. |
| info: | |
| JSON.parse ( text [ , reviver ] ) |
| |
| [...] |
| 7. If IsCallable(reviver) is true, then |
| [...] |
| d. Return ? InternalizeJSONProperty(root, rootName). |
| |
| InternalizeJSONProperty ( holder, name ) |
| |
| 1. Let val be ? Get(holder, name). |
| 2. If Type(val) is Object, then |
| a. Let isArray be ? IsArray(val). |
| b. If isArray is true, then |
| [...] |
| c. Else, |
| i. Let keys be ? EnumerableOwnPropertyNames(val, "key"). |
| ii. For each String P in keys, do |
| 1. Let newElement be ? InternalizeJSONProperty(val, P). |
| 2. If newElement is undefined, then |
| a. Perform ? val.[[Delete]](P). |
| |
| OrdinaryDelete ( O, P ) |
| |
| [...] |
| 4. If desc.[[Configurable]] is true, then |
| a. Remove the own property with name P from O. |
| ---*/ |
| |
| var json = '{"a": 1, "b": 2}'; |
| var obj = JSON.parse(json, function(key, value) { |
| if (key === 'a') { |
| Object.defineProperty(this, 'b', {configurable: false}); |
| } |
| if (key === 'b') return; |
| |
| return value; |
| }); |
| |
| assert.sameValue(obj.a, 1); |
| assert(obj.hasOwnProperty('b')); |
| assert.sameValue(obj.b, 2); |