tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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delete-symbol-properties.js (639B)

      1 // Copyright (C) 2015 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 es6id: 26.1.4
      5 description: >
      6  Delete a symbol property.
      7 info: |
      8  26.1.4 Reflect.deleteProperty ( target, propertyKey )
      9 
     10  ...
     11  2. Let key be ToPropertyKey(propertyKey).
     12  ...
     13 
     14  7.1.14 ToPropertyKey ( argument )
     15 
     16  ...
     17  3. If Type(key) is Symbol, then
     18    a. Return key.
     19  ...
     20 features: [Reflect, Symbol]
     21 ---*/
     22 
     23 var s = Symbol('1');
     24 var o = {};
     25 o[s] = 42;
     26 
     27 Reflect.deleteProperty(o, s);
     28 
     29 assert.sameValue(o.hasOwnProperty(s), false);
     30 assert.sameValue(o[s], undefined);
     31 
     32 reportCompare(0, 0);