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19 lines
636 B
JavaScript
19 lines
636 B
JavaScript
'use strict';
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/* Derived from `is-string 1.0.7`, under MIT license, (c) 2015 Jordan Harband.
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This version removes the try/catch for performance reasons, and replaces it with a test that unfortunately does not work on cross-realm values, pending an upstream fix. */
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var toStr = Object.prototype.toString;
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var strClass = '[object String]';
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var hasToStringTag = require('has-tostringtag/shams')();
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module.exports = function isString(value) {
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if (typeof value === 'string') {
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return true;
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}
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if (typeof value !== 'object') {
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return false;
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}
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return hasToStringTag ? value instanceof String : toStr.call(value) === strClass;
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};
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