So you want to contribute to Push, huh? Well lucky for you, it's really easy to do so, because you're just dealing with like, a few hundred lines of JavaScript. It's not hard.
Alright. Now calm down and take a few deep breaths. Here we go. All you have to remember is two commands... think you can do that?
To BUILD Push, just run:
npm run build
To TEST Push, run:
npm run test
See? Not hard at all. Unfortunately the Notifications API doesn't always play nicely with local sites, so don't get discouraged if you try running Push in a local HTML file and it doesn't work.
Push uses the Karma JavaScript test runner, so read up on that if you want to make changes to any of the tests that are run. These tests are run post-push by Travis CI, so look into that if you want to make any Travis configuration changes. Although, at this point I'd say Travis is all set. The tests might want to be expanded though.
THERE IS ONLY ONE RULE TO PUSH CLUB (and no, it's not that you can't talk about it). WHENEVER you make changes to Push.js, RECOMPILE and commit push.min.js as well. Until this build process can be wrapped into a sexy git hook of some sort, this is how changes to the library need to occur. YOUR PR WILL NOT BE APPROVED UNLESS THIS HAPPENS. That said, I did let it slide once because I wasn't thinking, but that's why I wrote this file to make sure it will never happen again.
Outside of that, contributing should not be at all scary and should be a fun and positive process. Now go out and write some killer JS! Wait... is there even such a thing?