You write this:
const [count, setCount] = useState(0);
Enter fullscreen mode
Exit fullscreen mode
Then the user clicks a button:
You write this: const [count, setCount] = useState(0); Enter fullscreen mode ...
You write this:
const [count, setCount] = useState(0);
Enter fullscreen mode
Exit fullscreen mode
Then the user clicks a button:

You update one small piece of state: setCount(count + 1); Enter fullscreen mode ...

Your confusion is coming from mixing JavaScript objects + mutation + React-style immutability...

Continues directly from Part 1. Same rule: no stories, no metaphors — just the real mechanics, in...

When starting React, understanding useState only through definitions can feel confusing. The easiest...

Every form I ever shipped before React 19 needed the same three pieces of state, and I wired them up...

I almost skipped past this. It looked like a small refactor. It ended up being the first time React's...