There may be a bug here

[12914hh]

Hi,
Thank you for providing such a useful tool.
But here I found a bug !
When I use the isNaN method in lodash,
I found that if I execute console.log(_.isNaN('a')), theoretically 'a' is a string, so the result should be true.
But now I'm getting false.
This is also the case with the RunKit test under the official documentation.

Thanks again

[nikwen]

NaN is a special constant in JavaScript: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/NaN

_.isNaN() only checks if your value is that constant.

See the second line in the documentation for pointers to functions that might help you accomplish what you're trying to accomplish:

[12914hh]

Thank you for your response, I indeed didn't understand the difference between isNaN and Number.isNaN. Thank you. 👍