447,211 weekly downloads for what can be done in vanilla JS with foo % 2 === 1;

He abandoned the projects, but:

* https://github.com/jonschlinkert/is-odd

* https://github.com/jonschlinkert/is-even

Of course that doesn't stop them from getting ~500k downloads/week.

If you're writing straightforward application code where you already know you have a valid number, then this package probably isn't for you. You can just do num % 2 === 1.

function is_number(val) { return typeof val === "number"; }

With a function that easily written, no one should have any excuse to depend on a third-party dependency for it.

Here's `is-number` (https://github.com/jonschlinkert/is-number/blob/master/index...):

    module.exports = function(num) {
      if (typeof num === 'number') {
        return num - num === 0;
      }
      if (typeof num === 'string' && num.trim() !== '') {
        return Number.isFinite ? Number.isFinite(+num) : isFinite(+num);
      }
      return false;
    };