Understanding the useEffect Hook in React.js and React Native
The useEffect hook is one of the most commonly used hooks in React.js and React Native. It enables you to handle side effects in your components, such as fetching data, updating the DOM, or subscribing to events. In this blog, we’ll dive into how useEffect works, its usage patterns, and best practices for both React.js and React Native . What is useEffect ? The useEffect hook is part of React's Hooks API , introduced in React 16.8. It lets you perform side effects in functional components, replacing the need for lifecycle methods like componentDidMount , componentDidUpdate , and componentWillUnmount in class components. Syntax of useEffect Here’s a basic syntax: useEffect ( () => { // Your side effect logic here return () => { // Cleanup logic here (optional) }; }, [dependencies]); Effect Function : The function that runs your side effect. Cleanup Function : An optional function returned from the effect function to clean up resources. Dependencies Array ...