[technion]

Although it's unclear, every time someone provides a one liner there are staunch not satire arguments about "covering edge cases you didn't think of" and I disagree. Look at the actual code: https://github.com/i-voted-for-trump/is-odd/

There's a "tested edge case" where you can check isOdd('1') and it will work - to me the code is already wrong, isOdd(STRING) should throw. The correct solution is to use Typescript and assert the input is a number.

The Number.isSafeInteger check is an interesting one. Yes, it's not "safe" to work with a number outside this but no doubt something in the function would be broken before an is-odd check if it was relied upon.

Often the edge case someone else catered to is something counter to my expectation. I would rather write two lines of code myself and be aware of the behaviour.