key features of useEffect hook in React component testing

key features of useEffect hook in React component

Posted by Jerin devassy on 12/15/2023

Category : Ecommerce-Web- App-Development

1. Purpose: useEffect is a React hook used for handling side effects in functional components. Side effects can include data fetching, subscriptions, DOM manipulations, and more.1
2. Functionality: It allows performing operations after the component renders or when certain dependencies change.
3. Syntax: It takes two arguments: a function and an optional dependency array.

• Function Argument: Contains the code for the side effect.
• Dependency Array: Specifies dependencies that, when changed, will trigger the effect to run again. If this array is empty, the effect runs only once after the initial render. If omitted, the effect runs after every render.