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28 lines
959 B
28 lines
959 B
var $ = require('../internals/export'); |
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var isArray = require('../internals/is-array'); |
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// eslint-disable-next-line es-x/no-object-isfrozen -- safe |
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var isFrozen = Object.isFrozen; |
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var isFrozenStringArray = function (array, allowUndefined) { |
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if (!isFrozen || !isArray(array) || !isFrozen(array)) return false; |
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var index = 0; |
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var length = array.length; |
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var element; |
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while (index < length) { |
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element = array[index++]; |
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if (!(typeof element == 'string' || (allowUndefined && typeof element == 'undefined'))) { |
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return false; |
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} |
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} return length !== 0; |
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}; |
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// `Array.isTemplateObject` method |
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// https://github.com/tc39/proposal-array-is-template-object |
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$({ target: 'Array', stat: true, sham: true, forced: true }, { |
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isTemplateObject: function isTemplateObject(value) { |
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if (!isFrozenStringArray(value, true)) return false; |
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var raw = value.raw; |
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return raw.length === value.length && isFrozenStringArray(raw, false); |
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} |
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});
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