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React JS Interview Questions

Top React JS Interview Questions with Answers Top React JS Interview Questions with Answers Author: Vishal Thakur Published: August 2021 React JS is a popular JavaScript library for building user interfaces. Below are some of the most frequently asked React JS interview questions with detailed answers to help you prepare for your next interview. 1. What is Virtual DOM? Answer: The Virtual DOM is an abstraction of the HTML DOM. It allows React to render subtrees of nodes based on state changes with minimal DOM manipulation, keeping components up to date efficiently. The DOM (Document Object Model) is an in-memory representation of HTML. React uses the Virtual DOM to optimize updates and improve performance by reducing direct DOM manipulations. 2. What are the Differences Between Functional and Class Comp...