useEffect
Explore the useEffect Hook to perform side effects such as data fetching and timers within React Native functional components. Understand its syntax, dependency array, and how to clean up side effects to prevent issues like memory leaks. This lesson helps you apply useEffect effectively for real-time updates in your mobile apps.
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The useEffect Hook is used to perform side effects in a React Native’s functional component. Examples of side effects include fetching data from an external API, manipulating the DOM, and adding timers. The useEffect Hook runs after the first render of the component and after every update to the component.
Note: React Native’s components are pure functions, i.e., they give the same output for similar inputs every time. Side effects refer to interacting with the outside world and performing certain actions that may or may not return the same output for similar inputs every time. ...