In addition to the "holy trinity" of HTML, CSS, and JavaScript, what should I know before building an awesome, interactive site?

Question

It would be a rap battle website, probably.

Answer 1

How to make that website load really fast.

Answer 2

html . css and js are just for front-end part of your website so if u want to build a dynamic website u have to deal with back-end as well .
use ( php and mysql ) or (node.js ) or whatever works for u .

Answer 3

Use webpack to automate dev task and fine tune the dist code.
Use git and GitHub for code versioning
Use vagrant for code testing

Answer 4

Complement JavaScript with Node.js, many of its tools make coding and testing really fluent.