Proposal: Prefer Number methods to their Global counterparts

Please describe what the rule should do: This rule will enforce the use of the modularized versions of parseInt, parseFloat and isNaN.

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

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

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

isNaN(foo); // warn
parseInt(foo); // warn
parseFloat(foo); // warn

Number.isNaN(foo); // fine
Number.parseInt(foo); // fine
Number.parseFloat(foo); // fine

Why should this rule be included in ESLint (instead of a plugin)? From MDN: The purpose of Number.parseInt and Number.parseFloat is “modularization of globals”. At the same time Number.NaN is “more robust”. This rule should be part of the Ecmascript 6 rules subset.

[kirly-af]

Also this rule might be auto “fixable”.

[platinumazure]

@kirly-af By the way, no-restricted-globals now supports custom messages, so you could use it and specify whatever message you want. Hope this helps!