Three.js how to use physics?

Question

JavaScript

Good time of the day!
Tell me which physics plugin to use for three.js? I found a mention of ammo.js, but I can't find any clear documentation.
What else can be used with three.js to develop browser games?
Almost all the articles that I found on three.js from 2012-2013, maybe something more convenient and efficient for 3D in the browser appeared?
PS
Sorry for the vague question, a couple of days ago I discovered three.js and was very surprised at its simplicity ... I used to think that it was mega complicated, but this is ordinary js. ) Share your experience, interested in technologies that allow you to create beautiful 3D and games for the browser as simply and quickly as possible.

Answer 1

I used to think that it was mega complicated, but it's just plain js. )

I am glad that you, knowing the language of the framework code, can immediately determine the complexity of development on this framework.
The answer to the question: knowledge of the framework architecture, API and all data formats that it can manipulate.
Technologies: Web
Means of achieving knowledge: Documentation, understanding, practice.