What is the use of event emitter?

Adding an Event Listener

However great this is, it is essential to note that purely functional components with hooks always re-render during a React render cycle . Therefore, React Hooks provide the best example for component reusability. When a parent component renders, React recursively renders all of its child components.

EventEmitterlink Use in components with the @Output directive to emit custom events synchronously or asynchronously, and register handlers for those events by subscribing to an instance .

An efficient way to solve stale closures is to correctly set the dependencies of React hooks . Or, in the case of a stale state, use a functional way to update the state. The key takeaway is to try to supply hooks with closures that capture the freshest variables.

What is stale state in React? Stale state is a problem that occurs whenever we’re trying to update state, often within a closure . A closure is a type of function in JavaScript, where we’re using a variable from an outer scope.