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isNaN --> Number.isNan #10313

stevenvachon opened this Issue May 4, 2018 · 2 comments


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stevenvachon commented May 4, 2018

Please describe what the rule should do:
Should push us to use Number.isNaN instead of isNaN.

What category of rule is this? (place an "X" next to just one item)

[ ] Enforces code style
[ ] Warns about a potential error
[x] Suggests an alternate way of doing something
[ ] Other (please specify:)

Provide 2-3 code examples that this rule will warn about:


Why should this rule be included in ESLint (instead of a plugin)?
It's native ES2015

See #375

@eslint eslint bot added the triage label May 4, 2018


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platinumazure commented May 4, 2018

Hi @stevenvachon, thanks for the issue.

This can already be done using no-restricted-globals. You can even include a message asking the user to use Number.isNaN.

I don't really want to add a rule in ESLint core just for this case-- we already have too many. But you are more than welcome to use or create a plugin with this rule.


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stevenvachon commented May 4, 2018

Ok, thank you.

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@eslint eslint bot added the archived due to age label Nov 1, 2018

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