1 var $ = require('../internals/export');
2 var isArray = require('../internals/is-array');
4 // eslint-disable-next-line es/no-object-isfrozen -- safe
5 var isFrozen = Object.isFrozen;
7 var isFrozenStringArray = function (array, allowUndefined) {
8 if (!isFrozen || !isArray(array) || !isFrozen(array)) return false;
10 var length = array.length;
12 while (index < length) {
13 element = array[index++];
14 if (!(typeof element == 'string' || (allowUndefined && typeof element == 'undefined'))) {
17 } return length !== 0;
20 // `Array.isTemplateObject` method
21 // https://github.com/tc39/proposal-array-is-template-object
22 $({ target: 'Array', stat: true }, {
23 isTemplateObject: function isTemplateObject(value) {
24 if (!isFrozenStringArray(value, true)) return false;
26 if (raw.length !== value.length || !isFrozenStringArray(raw, false)) return false;