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23 lines
970 B
23 lines
970 B
'use strict'; |
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/* eslint-disable es-x/no-array-prototype-indexof -- required for testing */ |
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var $ = require('../internals/export'); |
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var uncurryThis = require('../internals/function-uncurry-this'); |
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var $IndexOf = require('../internals/array-includes').indexOf; |
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var arrayMethodIsStrict = require('../internals/array-method-is-strict'); |
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var un$IndexOf = uncurryThis([].indexOf); |
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var NEGATIVE_ZERO = !!un$IndexOf && 1 / un$IndexOf([1], 1, -0) < 0; |
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var STRICT_METHOD = arrayMethodIsStrict('indexOf'); |
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// `Array.prototype.indexOf` method |
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// https://tc39.es/ecma262/#sec-array.prototype.indexof |
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$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD }, { |
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indexOf: function indexOf(searchElement /* , fromIndex = 0 */) { |
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var fromIndex = arguments.length > 1 ? arguments[1] : undefined; |
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return NEGATIVE_ZERO |
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// convert -0 to +0 |
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? un$IndexOf(this, searchElement, fromIndex) || 0 |
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: $IndexOf(this, searchElement, fromIndex); |
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} |
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});
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