| 'use strict'; | 
| var $ = require('../internals/export'); | 
| var toObject = require('../internals/to-object'); | 
| var nativeKeys = require('../internals/object-keys'); | 
| var fails = require('../internals/fails'); | 
|   | 
| var FAILS_ON_PRIMITIVES = fails(function () { nativeKeys(1); }); | 
|   | 
| // `Object.keys` method | 
| // https://tc39.es/ecma262/#sec-object.keys | 
| $({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, { | 
|   keys: function keys(it) { | 
|     return nativeKeys(toObject(it)); | 
|   } | 
| }); |