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39 lines
1.3 KiB
39 lines
1.3 KiB
'use strict'; |
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var $ = require('../internals/export'); |
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var toObject = require('../internals/to-object'); |
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var lengthOfArrayLike = require('../internals/length-of-array-like'); |
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var doesNotExceedSafeInteger = require('../internals/does-not-exceed-safe-integer'); |
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var fails = require('../internals/fails'); |
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var INCORRECT_TO_LENGTH = fails(function () { |
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return [].push.call({ length: 0x100000000 }, 1) !== 4294967297; |
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}); |
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// V8 and Safari <= 15.4, FF < 23 throws InternalError |
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// https://bugs.chromium.org/p/v8/issues/detail?id=12681 |
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var SILENT_ON_NON_WRITABLE_LENGTH = !function () { |
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try { |
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// eslint-disable-next-line es-x/no-object-defineproperty -- safe |
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Object.defineProperty([], 'length', { writable: false }).push(); |
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} catch (error) { |
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return error instanceof TypeError; |
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} |
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}(); |
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// `Array.prototype.push` method |
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// https://tc39.es/ecma262/#sec-array.prototype.push |
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$({ target: 'Array', proto: true, arity: 1, forced: INCORRECT_TO_LENGTH || SILENT_ON_NON_WRITABLE_LENGTH }, { |
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// eslint-disable-next-line no-unused-vars -- required for `.length` |
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push: function push(item) { |
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var O = toObject(this); |
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var len = lengthOfArrayLike(O); |
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var argCount = arguments.length; |
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doesNotExceedSafeInteger(len + argCount); |
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for (var i = 0; i < argCount; i++) { |
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O[len] = arguments[i]; |
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len++; |
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} |
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O.length = len; |
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return len; |
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} |
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});
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