{"id":6903,"date":"2021-09-15T04:21:29","date_gmt":"2021-09-15T04:21:29","guid":{"rendered":"https:\/\/programmingfields.com\/?p=6903"},"modified":"2026-05-02T06:29:32","modified_gmt":"2026-05-02T06:29:32","slug":"how-to-use-useeffect-hook-in-react-functional-component","status":"publish","type":"post","link":"https:\/\/programmingfields.com\/how-to-use-useeffect-hook-in-react-functional-component\/","title":{"rendered":"How to Use Effect Hook in React Functional Component"},"content":{"rendered":"\n

The React hooks are a very powerful feature that allows us to hook into the React functionality. It is a JavaScript function that can be used or called inside the React functional component. You cannot use a hook inside the custom function in the component. So, it is necessary to call the hook function at the top level. In our last post, we have already seen the useState() hook<\/a> for setting and retrieving the state value(s). You can create the custom hook in React functional component also. That we will see in the upcoming post. Today, in this post, we will see React useEffect hook. The useEffect <\/strong>hook works to perform side effects in the functional component. That means when any certain changes have occurred in the component the React useEffect hook <\/strong>can be called. It updates the DOM immediately when something change occurred in the component.<\/p>\n\n\n\n

In the class component, React has the life cycle methods. Here, the useEffect<\/strong> is equivalent to componentDidMount()<\/strong>, componentDidUpdate()<\/strong>, componentWillUnmount()<\/strong> life cycle methods. Let’s see an example for a better understanding of using the useEffect hook<\/strong> in React js.<\/p>\n\n\n\n

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