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How to Properly Set Multiple States Inside Multiple useEffect Hooks in React 📌[All Method]️

The blog will help about How to Properly Set Multiple States Inside Multiple useEffect Hooks in React & learn how to solve different problems that come from coding errors. By following this guide, you will be able to deal with these sorts of difficulties.
Question: What is the best way to approach this problem? Answer: Check out this blog code to learn how to fix errors How to Properly Set Multiple States Inside Multiple useEffect Hooks in React. Question: What are the reasons for this code mistake and how can it be fixed? Answer: You can find a solution by following the advice in this blog.

Suppose we have a state that we’ve initialized using useState().

const [ count, setCount ] = useState({
  a: 0,
  b: 0
});

Suppose we want to update multiple attributes inside count using different useEffect() hooks.

We might think to write it this way.

useEffect(() => {
  setCount({ ...count, a: props.a });
}, [props.a]);

useEffect(() => {
  setCount({ ...count, b: props.b });
}, [props.b]);

The problem with this approach is that a may never be updated.

Both useEffect() hooks run in the same React cycle and the same context. This means that the value of a and b inside ...count is exactly the same in both useEffect() hooks. The second setCount() will inevitably replace the first setCount().

In order to solve this problem, we can do this instead:

useEffect(() => {
  setCount((count) => ({ ...count, a: props.a }));
}, [props.a]);

useEffect(() => {
  setCount((count) => ({ ...count, b: props.b }));
}, [props.b]);

After each setCount(), we will receive the most updated value of count.


Now you learned, How you can use & How to Properly Set Multiple States Inside Multiple useEffect Hooks in React.
If you need assistance at any stage, please feel free to contact me.

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