Q471. What is an Iterator?
An iterator is an object which defines a sequence and a return value upon its termination. It implements the Iterator protocol with a `next()` method which returns an obj...
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Q472. What are React Server components?
React Server Component is a way to write React component that gets rendered in the server-side with the purpose of improving React app performance. These components allow...
Q473. How does synchronous iteration works?
Synchronous iteration was introduced in ES6 and it works with below set of components, **Iterable:** It is an object which can be iterated over via a method whose key is ...
Q474. What is prop drilling?
Prop Drilling is the process by which you pass data from one component of the React Component tree to another by going through other components that do not need the data ...
Q475. What is the event loop?
The event loop is a process that continuously monitors both the call stack and the event queue and checks whether or not the call stack is empty. If the call stack is emp...
Q476. What is the difference between useState and useRef hook?
1. useState causes components to re-render after state updates whereas useRef doesn’t cause a component to re-render when the value or state changes. Essentially, useRef ...
Q477. What is the call stack?
Call Stack is a data structure for javascript interpreters to keep track of function calls(creates execution context) in the program. It has two major actions, 1. Wheneve...
Q478. What is a wrapper component?
A wrapper in React is a component that wraps or surrounds another component or group of components. It can be used for a variety of purposes such as adding additional fun...
Q479. What is the event queue?
The event queue follows the queue data structure. It stores async callbacks to be added to the call stack. It is also known as the Callback Queue or Macrotask Queue. When...
Q480. What are the differences between useEffect and useLayoutEffect hooks?
useEffect and useLayoutEffect are both React hooks that can be used to synchronize a component with an external system, such as a browser API or a third-party library. Ho...