28 lines
754 B
TypeScript
28 lines
754 B
TypeScript
/**
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* Checks if `value` is a finite number.
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*
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* Acts as a type guard for `number` values — returning `true` only when `value`
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* is of type `number` and finite (not `Infinity`, `-Infinity`, or `NaN`).
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*
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* @param {unknown} value The value to check.
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* @returns {value is number} Returns `true` if `value` is a finite number, `false` otherwise.
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*
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* @example
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* ```typescript
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* const value1 = 100;
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* const value2 = Infinity;
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* const value3 = '100';
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*
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* console.log(isFinite(value1)); // true
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* console.log(isFinite(value2)); // false
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* console.log(isFinite(value3)); // false
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*
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* if (isFinite(value1)) {
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* console.log(value1.toFixed(2));
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* }
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* ```
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*/
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declare function isFinite(value: unknown): value is number;
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export { isFinite };
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