The useCallback hook caches a function reference to prevent it from being recreated every time it renders, thus improving performance. Therefore, useCallback should only be used when the function reference needs to remain stable.
The useCallback function in React takes two parameters: a function as the first parameter and a dependency array as the second parameter. The function will only be recreated when the values in the dependency array change.
Avoid including values that will change on every render in the dependency array, such as variables declared within a function.
The reference to the function returned by useCallback is stable, but the variables referenced within the function may change, so it is important to be mindful of whether these variables will affect the function’s outcome.
When using useCallback, be mindful of side effects in the function and try to avoid introducing external variables or state within the function.
When using useCallback, it is important to avoid overusing it. Only use it when there are performance issues or a need to cache function references.
