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22 lines
973 B
22 lines
973 B
'use strict'; |
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var $ = require('../internals/export'); |
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var $indexOf = require('../internals/array-includes').indexOf; |
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var arrayMethodIsStrict = require('../internals/array-method-is-strict'); |
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var arrayMethodUsesToLength = require('../internals/array-method-uses-to-length'); |
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var nativeIndexOf = [].indexOf; |
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var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0; |
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var STRICT_METHOD = arrayMethodIsStrict('indexOf'); |
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var USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 }); |
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// `Array.prototype.indexOf` method |
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// https://tc39.github.io/ecma262/#sec-array.prototype.indexof |
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$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD || !USES_TO_LENGTH }, { |
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indexOf: function indexOf(searchElement /* , fromIndex = 0 */) { |
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return NEGATIVE_ZERO |
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// convert -0 to +0 |
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? nativeIndexOf.apply(this, arguments) || 0 |
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: $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined); |
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} |
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});
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