debian-mirror-gitlab/core-js/modules/es.array.index-of.js
2019-09-25 13:30:05 +05:30

20 lines
779 B
JavaScript

'use strict';
var $ = require('../internals/export');
var $indexOf = require('../internals/array-includes').indexOf;
var sloppyArrayMethod = require('../internals/sloppy-array-method');
var nativeIndexOf = [].indexOf;
var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
var SLOPPY_METHOD = sloppyArrayMethod('indexOf');
// `Array.prototype.indexOf` method
// https://tc39.github.io/ecma262/#sec-array.prototype.indexof
$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || SLOPPY_METHOD }, {
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);
}
});