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