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What is the way to utilize the current updated value in the useCallback hook?

asked 2021-12-10 11:00:00 +0000

scrum gravatar image

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answered 2022-10-10 01:00:00 +0000

qstack gravatar image

To utilize the current updated value in the useCallback hook, you can add the value as a dependency in the dependency array. This will ensure that whenever the value changes, the callback function is re-created with the updated value.

For example, suppose you have a state variable count which is updated using a button click, and you want to pass the updated count value to a child component using the useCallback hook. You can do this by adding count as a dependency in the dependency array, like this:

const handleButtonClick = useCallback(() => {
  setCount(count + 1);
}, [count]);

return (
  <div>
    <button onClick={handleButtonClick}>Click me!</button>
    <ChildComponent callback={handleCallback} count={count} />
  </div>
);

In this example, the handleButtonClick callback function is created using the useCallback hook, and the count value is added as a dependency in the dependency array. Whenever the count value changes, the handleButtonClick function will be re-created with the updated value. The updated count value is then passed to the ChildComponent using a prop.

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Asked: 2021-12-10 11:00:00 +0000

Seen: 1 times

Last updated: Oct 10 '22