main
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Last change
on this file was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 6 days ago |
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F4 Finalna Verzija
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File size:
669 bytes
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| [79a0317] | 1 | 'use strict';
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| 2 | var wellKnownSymbol = require('../internals/well-known-symbol');
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| 3 | var create = require('../internals/object-create');
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| 4 | var defineProperty = require('../internals/object-define-property').f;
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| 5 |
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| 6 | var UNSCOPABLES = wellKnownSymbol('unscopables');
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| 7 | var ArrayPrototype = Array.prototype;
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| 8 |
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| 9 | // Array.prototype[@@unscopables]
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| 10 | // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
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| 11 | if (ArrayPrototype[UNSCOPABLES] === undefined) {
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| 12 | defineProperty(ArrayPrototype, UNSCOPABLES, {
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| 13 | configurable: true,
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| 14 | value: create(null)
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| 15 | });
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| 16 | }
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| 17 |
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| 18 | // add a key to Array.prototype[@@unscopables]
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| 19 | module.exports = function (key) {
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| 20 | ArrayPrototype[UNSCOPABLES][key] = true;
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| 21 | };
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