Which JS game engine to choose for developing multiplayer games?

Question

JavaScript

I want to create 2D browser games with multiplayer.
Games will be simple and primitive, just like Agar.IO or Slither.io. Where you just need to enter a nickname to start playing.
Before that, I did not develop games for the browser, only in Unity with C #.
Where to begin? The choice is large, but I don't know what exactly suits me.
Should I start right away with engines, or should I create on pure JS without using engines?

Answer 1

Crafty.js - I think the easiest to learn.

Answer 2

I'm currently learning phaser.io