Rock, Paper, Scissors | (NextJS,TailwindCSS,Framer Motion)

Hey Emre! Great job on your solution! I checked into your question and have some feedback.

• Score takes a negative value.

This can be fixed by wrapping your setScore((score) => score -1) inside an if statement like so

if (score > 0) {
  setScore((score) => score - 1)
}

• Score doesn't seem to be updating correctly

You are right on thinking it is the useEffect hook that is causing problems here. useEffect gets called on initial render and again every time anything in the dependency array changes. You also never want to update anything from the dependency array from inside the useEffect. This could cause an infinite loop. In your case, the useEffect is running a minimum of 2 times and that is part of why you are seeing weird scores. The way your game is setup you can actually leave the dependency array empty like so

 useEffect(() => {
   onSelect();
 }, []);

In addition, there's a weird thing happening with useState inside your GameContext.js. useState actually takes 'time' to update its value. It's just a part of react. When you setState and then ask your function to do something with it, it is using the previous value. You can replace houseSelection with number inside your function like so

const onSelect = () => {
  const userSelect = GameRules[selection].value;
  const number = Math.floor(Math.random() * 3);
  setHouseSelection(number);

  setTimeout(() => {
    setShow(true);
    if (GameRules[number].beats.includes(userSelect)) {
      setResult("You Lose");
      setScore((score) => score - 1);
    } else {
      if (GameRules[number].value == userSelect) {
        setResult("Tie");
      } else {
        setResult("You Win");
        setScore((score) => score + 1);
      }
    }
  }, 3000);
};