Function isNumber

数字を表すかどうかを判定する

Example

isNumber(0.1); // true
isNumber("0.1"); // true
isNumber("0.1", false); // false
  • isNumber<T extends boolean>(
        number: unknown,
        loose?: T,
    ): number is T extends true ? string | number : number

    Type Parameters

    • T extends boolean

    Parameters

    • number: unknown
    • loose: T = ...

      文字列も対象にするかどうか (default: true)

    Returns number is T extends true ? string | number : number

    boolean

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