| 'use strict'; |
| |
| var ES = require('es-abstract/es6'); |
| var $isNaN = Number.isNaN || function isNaN(a) { |
| return a !== a; |
| }; |
| var $isFinite = Number.isFinite || function isFinite(n) { |
| return typeof n === 'number' && global.isFinite(n); |
| }; |
| var indexOf = Array.prototype.indexOf; |
| |
| module.exports = function includes(searchElement) { |
| var fromIndex = arguments.length > 1 ? ES.ToInteger(arguments[1]) : 0; |
| if (indexOf && !$isNaN(searchElement) && $isFinite(fromIndex) && typeof searchElement !== 'undefined') { |
| return indexOf.apply(this, arguments) > -1; |
| } |
| |
| var O = ES.ToObject(this); |
| var length = ES.ToLength(O.length); |
| if (length === 0) { |
| return false; |
| } |
| var k = fromIndex >= 0 ? fromIndex : Math.max(0, length + fromIndex); |
| while (k < length) { |
| if (ES.SameValueZero(searchElement, O[k])) { |
| return true; |
| } |
| k += 1; |
| } |
| return false; |
| }; |