Rule proposal: prefer-number-is-integer

[jonahsnider]

Use Number.isInteger.
Not really sure if there's any benefit to using it. Maybe it's more performant. Makes the code marginally cleaner.

Fail

number % 1 === 0;

Pass

Number.isInteger(number);

[sindresorhus]

Makes the code marginally cleaner.

Marginally cleaner is an understatement. number % 1 === 0; is extremely unreadable and also fails if the passed in variable is not a number:

let number = [['1']];

// ...

number % 1 === 0;
//=> true

Some more cases it could catch: https://stackoverflow.com/a/34848042/64949

And it could also catch _.isInteger.

[sindresorhus]

This is now accepted.

[sindresorhus]

If anyone wants to work on this, see the initial attempt and feedback in #1509