32 lines
1.0 KiB
JavaScript
32 lines
1.0 KiB
JavaScript
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'use strict';
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var callBound = require('call-bound');
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/** @type {(receiver: ThisParameterType<typeof String.prototype.valueOf>, ...args: Parameters<typeof String.prototype.valueOf>) => ReturnType<typeof String.prototype.valueOf>} */
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var $strValueOf = callBound('String.prototype.valueOf');
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/** @type {import('.')} */
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var tryStringObject = function tryStringObject(value) {
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try {
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$strValueOf(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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/** @type {(receiver: ThisParameterType<typeof Object.prototype.toString>, ...args: Parameters<typeof Object.prototype.toString>) => ReturnType<typeof Object.prototype.toString>} */
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var $toString = callBound('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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/** @type {import('.')} */
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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 (!value || typeof value !== 'object') {
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return false;
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}
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return hasToStringTag ? tryStringObject(value) : $toString(value) === strClass;
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};
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