ReactJS - prevState in the new useState React hook?

Question

I really like the new React hooks and I\'m using them frequently for a project I\'m working on. I\'m coming across a situation where I want to use the prevState in the

Answer 1

In order to use Map objects, you'll need to clone it before manipulating the values. Otherwise, it's mutating the original Map object and React doesn't handle mutatable state.

const handleChange = useCallback(({ target: { name, checked } }) => {
  setCheckbox(prevState => {
    return new Map(prevState).set(name, checked);
  });
}, []);

Updated Working Example: