1 var $ = require('../internals/export');
2 var isArray = require('../internals/is-array');
4 var isFrozen = Object.isFrozen;
6 var isFrozenStringArray = function (array, allowUndefined) {
7 if (!isFrozen || !isArray(array) || !isFrozen(array)) return false;
9 var length = array.length;
11 while (index < length) {
12 element = array[index++];
13 if (!(typeof element === 'string' || (allowUndefined && typeof element === 'undefined'))) {
16 } return length !== 0;
19 // `Array.isTemplateObject` method
20 // https://github.com/tc39/proposal-array-is-template-object
21 $({ target: 'Array', stat: true }, {
22 isTemplateObject: function isTemplateObject(value) {
23 if (!isFrozenStringArray(value, true)) return false;
25 if (raw.length !== value.length || !isFrozenStringArray(raw, false)) return false;