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- 'use strict';
- var $ = require('../internals/export');
- var isArray = require('../internals/is-array');
-
- // eslint-disable-next-line es/no-object-isfrozen -- safe
- 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 && element === undefined))) {
- return false;
- }
- } return length !== 0;
- };
-
- // `Array.isTemplateObject` method
- // https://github.com/tc39/proposal-array-is-template-object
- $({ target: 'Array', stat: true, sham: true, forced: true }, {
- isTemplateObject: function isTemplateObject(value) {
- if (!isFrozenStringArray(value, true)) return false;
- var raw = value.raw;
- return raw.length === value.length && isFrozenStringArray(raw, false);
- }
- });
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