Day 73 Self-Study to Web Dev!

Took it easy today , usually I do a full 8 hours of work / self-study, but today, 1 hour. Remember anything worth doing is worth doing poorly (and well). Feeling a bit burnt out going 73 days straight. I’ll keep it up though, just wanted to take it easier today. Anyways, here is what I accomplished..
Spent the first half hour of my day working on a custom JavaScript Math Library, have the range function and addition function complete so far. Trying to make everything intuitive and easy to use. I have never created a library before a basic math library would be a good first experience.
The goal of the library is to give developers a friendly and intuitive experience when dealing with the library options. For example the addition function I worked on today takes in any amount of number (or number with typeof string) and arrays, mushes them all into one single array, and adds them all together. Here is the addition function I hashed out.

So there we have it. Also React has been put off long enough, tomorrow is the day to start.
=> All code since day one can be found here on github!