Function isNumber

  • isNumber(obj): obj is number

  • 判断给定的对象是否为数字类型

    Parameters

    • obj: unknown

      要判断的对象

    Returns obj is number

    如果是数字类型，则返回true；否则返回false

    Example

    // true
    isNumber(NaN)
    isNumber(123)

    // false
    isNumber(true)
    isNumber(undefined)
    isNumber('')

Settings

Member Visibility