Q221. Is it recommended to use CSS In JS technique in React?
React does not have any opinion about how styles are defined but if you are a beginner then good starting point is to define your styles in a separate \*.css file as usua...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (454 available).
Active:
Tag: react ×
Q222. Do I need to rewrite all my class components with hooks?
No. But you can try Hooks in a few components(or new components) without rewriting any existing code. Because there are no plans to remove classes in ReactJS.
Q223. What is useEffect hook? How to fetch data with React Hooks?
The `useEffect` hook is a React Hook that lets you perform **side effects** in function components. Side effects are operations that interact with the outside world or sy...
Q224. Is Hooks cover all use cases for classes?
Hooks doesn't cover all use cases of classes but there is a plan to add them soon. Currently there are no Hook equivalents to the uncommon **getSnapshotBeforeUpdate** and...
Q225. What is the stable release for hooks support?
React includes a stable implementation of React Hooks in 16.8 release for below packages 1. React DOM 2. React DOM Server 3. React Test Renderer 4. React Shallow Renderer
Q226. Why do we use array destructuring (square brackets notation) in `useState`?
When we declare a state variable with `useState`, it returns a pair — an array with two items. The first item is the current value, and the second is a function that upda...
Q227. What are the sources used for introducing hooks?
Hooks got the ideas from several different sources. Below are some of them, 1. Previous experiments with functional APIs in the react-future repository 2. Community exper...
Q228. How do you access imperative API of web components?
Web Components often expose an imperative API to implement its functions. You will need to use a **ref** to interact with the DOM node directly if you want to access impe...
Q229. What is formik?
Formik is a small react form library that helps you with the three major problems, 1. Getting values in and out of form state 2. Validation and error messages 3. Handling...
Q230. What are typical middleware choices for handling asynchronous calls in Redux?
When managing asynchronous side effects (such as API calls, debouncing, and web sockets) in Redux, several middleware libraries have evolved: ### 1. Redux Toolkit Query (...