I need answers for these questions plzz

Question

1) How to do a collision detection in Javascript and also when we collide we stand on top of it
2) what means function (e){
e.clientX
}
or like that and where can I learn these things
3) how to know everything about Javascript

Answer 1

First up, follow this team everything.js and you can learn a load of things by viewing their codes and tips on their feeds 👍

Answer 2

See the Coding Train youtube channel he explain all that topics