React useEffect Dependecy releated Problem

Question

In React I have used useEffect to fetch data. But I have confusion when I have to mention the dependency and when I have to keep it empty

Answer 1

You can use useEffect which:

1. Empty dependency array when you need it runs once on the first time when mounted (ex: initialize data,...).
2. Not-empty dependency array when you want it runs when anything in the dependency changes (ex: trigger some API calls when state changes,...).

But you should check out the docs for further information.