【Q622】Number.isNaN 与 globalThis.isNaN 有何区别

[shfshanyue]

No description provided.

[shfshanyue]

Number.isNaN(NaN)
isNaN(NaN)

Number.isNaN('NaN')
isNaN('NaN')

[nmsn]

Number.isNaN(NaN)
isNaN(NaN)

Number.isNaN('NaN')
isNaN('NaN')

试了下 Number.isNaN('NaN') 是 false，其他都是 true

[HydratedPig]

还真没注意过，看了下 MDN，上面解释已经很明示了

• isNaN:

Return Value: true if the given value is NaN after being converted to a number; otherwise, false.

• Number.isNaN:

Return value: The boolean value true if the given value is a number with value NaN. Otherwise, false.

globalThis.isNaN 会对参数进行强制转换后判断是不是 NaN，而 Number.isNaN 不会对输入的参数进行强制转换