43 lines
1.4 KiB
JavaScript
43 lines
1.4 KiB
JavaScript
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'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 setArrayLength = require('../internals/array-set-length');
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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 properErrorOnNonWritableLength = function () {
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try {
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// eslint-disable-next-line es/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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var FORCED = INCORRECT_TO_LENGTH || !properErrorOnNonWritableLength();
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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: FORCED }, {
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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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setArrayLength(O, len);
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return len;
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}
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});
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