Interesting alternative to RegExps. Most devs would lean to RegExps because it is familiar and expected. Insert comment about readability here.

Nit Picks

I think most of the code examples in this repo use double-quotes instead of single-quotes and they don't have spaces inside the parenthesis.

okay I've made the changes suggested

IMO this is simpler than RegExps because RegExps require you to escape certain characters.

This is especially problematic if you are using a RegExp on a variable string, because certain characters need to be double escaped

you're right it's less intuitive/readable. but at the other day, this is JavaScript. Other languages have this kind of thing built in