| /*! |
| * is-data-descriptor <https://github.com/jonschlinkert/is-data-descriptor> |
| * |
| * Copyright (c) 2015, Jon Schlinkert. |
| * Licensed under the MIT License. |
| */ |
| |
| 'use strict'; |
| |
| var typeOf = require('kind-of'); |
| |
| // data descriptor properties |
| var data = { |
| configurable: 'boolean', |
| enumerable: 'boolean', |
| writable: 'boolean' |
| }; |
| |
| function isDataDescriptor(obj, prop) { |
| if (typeOf(obj) !== 'object') { |
| return false; |
| } |
| |
| if (typeof prop === 'string') { |
| var val = Object.getOwnPropertyDescriptor(obj, prop); |
| return typeof val !== 'undefined'; |
| } |
| |
| if (!('value' in obj) && !('writable' in obj)) { |
| return false; |
| } |
| |
| for (var key in obj) { |
| if (key === 'value') continue; |
| |
| if (!data.hasOwnProperty(key)) { |
| continue; |
| } |
| |
| if (typeOf(obj[key]) === data[key]) { |
| continue; |
| } |
| |
| if (typeof obj[key] !== 'undefined') { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Expose `isDataDescriptor` |
| */ |
| |
| module.exports = isDataDescriptor; |