Write a code to you read into 1 year (and understand without adding comments)

Code Style Guide

GitHub - ryanmcdermott/clean-code-javascript: :bathtub: Clean Code concepts adapted for JavaScript

Google JS + HTML/CSS Styleguide:

Google HTML/CSS Style Guide

Google JavaScript Style Guide

Airbnb's React/JSX Style Guide:

airbnb/javascript

Good Refactoring vs Bad Refactoring