[atleta]

I haven't heard about him but checking the source tree of our 2 front-end apps and his 'is-number' package (which his is-odd depends on), seems to be imported by quite a few other packages.

Now looking at the source, that package may make sense if figuring out whether something is a number type in JS is really that cumbersome. (Though I'd expect that there is a more generic package that covers the other built-in types as well.)

Also since isNumber treats strings that can be converted to a number, a number, it can yield weird results since adding two strings will naturally just concatenate them. So e.g.:

    const a = '1'; 
    isNumber(a); // returns true
    const b = a + a; // Now you have a string in b: '11'

Of course, it's standard JS stupidity (and 2*a would be 2, and 1+'1' and '1'+1 would both be '11'), but then maybe stating that '1' is a number is not the right response. However, the package was downloaded 46 million times last week and that seems to be so low only because of Christmas. The previous weeks averaged around 70M. And most of these are dependencies, like in our projects, I'm sure.