Answer: What do I have to do to update array values in the react hook?

answer re: How to push a new value into the current array using the react hooks?

Dec 21 '19

2

react will not rerender if setState return the same state that was before when you use the push method you mutate the state object. instead create a new array with the new item.

always update your state in immutable way.

in your case:

onClick={() => {
   setArr((prevArr) => ([...prevArr, prevArr.length

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