Have a look at the files inside

Follow a good JavaScript Red Style Guide

Use eslint or jslint

Make sure objects are what you think with https://github.com/sbansal6/schema-enforcer or Typescript.

with Jasmine or Ava or mocha/chai

Basic syntax https://validator.w3.org/ or https://html5.validator.nu/ or https://validator.w3.org/nu/#textarea

User experience with light-house

Random UI test with gremlins.js

Babel or Bublé.

Learn how JavaScript work first, then come back. Here are some good links:

• Eloquent Javascript
• Javascript-allongé
• jstherightway
• A re-introduction to JavaScript
• Crockford on JavaScript - Section 8: Programming Style & Your Brain (video)
• JavaScript examples

This project is free and open source. See License

other project mentioned here, and subfolders, may have other licenses