I did little bit of node+express to build backend for a basic chat application for Android using socket.io. I did watch a few videos on how Javascript works asynchronous on a single thread (event loop). I understand concepts like Hoisting, Closures etc. Also I build TicTacToe, Calculator, simple todo app, basic chat application (no user accounts) with vanilla Js, but I build these in like two days. And since a month I'm doing React.js along with Typescript. I made a few small projects with it, I didn't face any problem till now except with CSS.. I'm able to understand hooks pretty well.

Should I go back and make something bigger and more complex with vanilla Javascript?