How to make the game code completely unchangeable by the client?

Question

JavaScript

I'm developing a game and I was thinking about how in the future to create a multiplayer game without the possibility of breaking into the data with the possibility of changing it.

As you can see, here when entering the developer console, we can see that the gravity data is indicated. Any user can change them.
Even if you use JavaScript Compresser, you can still bring it to a readable form.
How to limit this data and protect from cheating if I want to create a multiplayer.?

Answer 1

How to limit this data and protect from cheating if I want to create a multiplayer.?

On the client side, no way. With a certain desire and free time, everything that has flown to the client can be studied and changed, so that all important checks must be made on the server.

Answer 2

No way.

Answer 3

If the game is for a closed platform, such as game consoles, then it is enough to encrypt outgoing data.

Answer 4

Asm.js via Emscripten as an obfuscation option. (part of code - write in C)
C++ ⇒ LLVM ⇒ Emscripten ⇒ JavaScript