| 'use strict'; | 
| var $ = require('../internals/export'); | 
| var $includes = require('../internals/array-includes').includes; | 
| var fails = require('../internals/fails'); | 
| var addToUnscopables = require('../internals/add-to-unscopables'); | 
|   | 
| // FF99+ bug | 
| var BROKEN_ON_SPARSE = fails(function () { | 
|   // eslint-disable-next-line es/no-array-prototype-includes -- detection | 
|   return !Array(1).includes(); | 
| }); | 
|   | 
| // `Array.prototype.includes` method | 
| // https://tc39.es/ecma262/#sec-array.prototype.includes | 
| $({ target: 'Array', proto: true, forced: BROKEN_ON_SPARSE }, { | 
|   includes: function includes(el /* , fromIndex = 0 */) { | 
|     return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined); | 
|   } | 
| }); | 
|   | 
| // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables | 
| addToUnscopables('includes'); |