16 lines
336 B
TypeScript
16 lines
336 B
TypeScript
/**
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* Checks if the value is NaN.
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*
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* @param {any} value - The value to check.
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* @returns {boolean} `true` if the value is NaN, `false` otherwise.
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*
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* @example
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* isNaN(NaN); // true
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* isNaN(0); // false
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* isNaN('NaN'); // false
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* isNaN(undefined); // false
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*/
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declare function isNaN(value?: any): boolean;
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export { isNaN };
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