为什么 isNaN('-10') 是假的？
Why is isNaN('-10') false?
只是好奇为什么 isNaN('-10') 是假的？我在想 isNaN('-10') 应该是真的，但是 isNaN(-10) 应该是假的？
Javascript 是否尝试在应用 isNaN 之前将字符串转换为数字？
来自MDN：
Since the very earliest versions of the isNaN function specification, its behavior for non-numeric arguments has been confusing. When the argument to the isNaN function is not of type Number, the value is first coerced to a Number. The resulting value is then tested to determine whether it is NaN.
isNaN 隐式转换为 Number 类型。 Link
只是好奇为什么 isNaN('-10') 是假的？我在想 isNaN('-10') 应该是真的，但是 isNaN(-10) 应该是假的？
Javascript 是否尝试在应用 isNaN 之前将字符串转换为数字？
来自MDN：
Since the very earliest versions of the isNaN function specification, its behavior for non-numeric arguments has been confusing. When the argument to the isNaN function is not of type Number, the value is first coerced to a Number. The resulting value is then tested to determine whether it is NaN.
isNaN 隐式转换为 Number 类型。 Link