| var $ = require('../internals/export'); |
| var isArray = require('../internals/is-array'); |
| |
| var isFrozen = Object.isFrozen; |
| |
| var isFrozenStringArray = function (array, allowUndefined) { |
| if (!isFrozen || !isArray(array) || !isFrozen(array)) return false; |
| var index = 0; |
| var length = array.length; |
| var element; |
| while (index < length) { |
| element = array[index++]; |
| if (!(typeof element === 'string' || (allowUndefined && typeof element === 'undefined'))) { |
| return false; |
| } |
| } return length !== 0; |
| }; |
| |
| // `Array.isTemplateObject` method |
| // https://github.com/tc39/proposal-array-is-template-object |
| $({ target: 'Array', stat: true }, { |
| isTemplateObject: function isTemplateObject(value) { |
| if (!isFrozenStringArray(value, true)) return false; |
| var raw = value.raw; |
| if (raw.length !== value.length || !isFrozenStringArray(raw, false)) return false; |
| return true; |
| } |
| }); |