25 lines
578 B
JavaScript
25 lines
578 B
JavaScript
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'use strict';
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var strValue = String.prototype.valueOf;
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var tryStringObject = function tryStringObject(value) {
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try {
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strValue.call(value);
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return true;
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} catch (e) {
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return false;
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}
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};
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var toStr = Object.prototype.toString;
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var strClass = '[object String]';
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var hasToStringTag = typeof Symbol === 'function' && !!Symbol.toStringTag;
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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 ? tryStringObject(value) : toStr.call(value) === strClass;
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};
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