LÖVE

I have just started with LUA,LOVE2D and need help to find any doc for push library.

Hi and welcome to the forums;

now, which push library are you talking about? Could you link where you got it from?

edit: is it this one? https://github.com/Ulydev/push

A lot of libraries are like that. Most of the time you can get a pretty solid idea what it does by inspecting the source code and reading comments.