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| 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 'use strict'; |
| 6 |
| 7 // This file relies on the fact that the following declaration has been made. |
| 8 // var $Array = global.Array; |
| 9 // var $Symbol = global.Symbol; |
| 10 |
| 11 function UnscopablesExtendSymbol() { |
| 12 %CheckIsBootstrapping(); |
| 13 InstallConstants($Symbol, $Array( |
| 14 "unscopables", symbolUnscopables |
| 15 )); |
| 16 } |
| 17 |
| 18 UnscopablesExtendSymbol(); |
| 19 |
| 20 |
| 21 var arrayUnscopables = { |
| 22 __proto__: null, |
| 23 copyWithin: true, |
| 24 entries: true, |
| 25 fill: true, |
| 26 find: true, |
| 27 findIndex: true, |
| 28 keys: true, |
| 29 values: true, |
| 30 }; |
| 31 |
| 32 |
| 33 function UnscopablesExtendArrayPrototype() { |
| 34 %CheckIsBootstrapping(); |
| 35 %AddNamedProperty($Array.prototype, symbolUnscopables, arrayUnscopables, |
| 36 DONT_ENUM | READ_ONLY); |
| 37 } |
| 38 |
| 39 UnscopablesExtendArrayPrototype(); |
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