Skip to content
An online multiplayer version of Rock-Paper-Scissors (because why not?)
JavaScript CSS HTML
Branch: master
Clone or download

Latest commit

Fetching latest commit…
Cannot retrieve the latest commit at this time.


Type Name Latest commit message Commit time
Failed to load latest commit information.


This is a fully functional multiplayer rock-paper-scissors game, with chat functionality, built with jQuery and Firebase. It was a fun, quick thing to put together to get more practice working with the Firebase database, which I hadn't used before.


  • A user may only sign in once, and no one can sign in after two users have signed up to play
  • The chat function is open to anybody, including observers. All observers are given the handle of "Anon." Only the players are given named handles.
  • When a player signs off, their data disappears and someone may sign in to replace them. The other player's stats are saved until they quit.
  • If all users sign off, the system is set up to reset the game conditions when the next first user signs on to play a fresh round.


The big challenge was figuring out how to capture the unique user key for each user who logs on, but once I did that, building the logic to prevent multiple sign-ins by one person or inadvertent clicks by the wrong player (or watcher) was easy.

The site incorporates two other databases, too: a game database, where the current conditions of play are set, and a chat database, where the chat history is stored.

Working with Firebase

Gotta be honest, it wasn't my favorite. The documentation's pretty much only for advanced site-building, with explanations of how to sign up users with an authorization screen or through authentication through Google. I needed the instructions on how to walk before I could run.

I had to spend a lot of time with it and searching on other forums to start to understand what was going on. Got there in the end, though!

You can’t perform that action at this time.