How can you interact between js and the game?

Question

JavaScript

How can you interact between js and a running game? Something like writing something in the chat of the game through js, clicking on the button in the game, etc. or like in a discord, so that in a program on js it shows what game you are playing.
Maybe there are some modules for node js?

Answer 1

Question from the series: how to attach a motor from a boat to a car to make an amphibian?
It all depends on the final game, if there is no open API for it, or documentation for writing custom mods, you will actually have to hack it and decompose it into amino acids.
Of course, you can do some user emulation, for example, using such tools sikulix.com