React interview questions in Hindi #1 What is React & How does React work
1#ReactJS #JavaScript #FrontEndDev #WebDevelopment #UIFramework #ReactComponents #StateManagement #ReactHooks #SinglePageApp #JSX #PropsAndState #ContextAPI #ReactRouter #PerformanceOptimization #CodeSplitting #ResponsiveDesign #UnitTesting #FrontEndInterview #WebDevSkills
#ReactNative #VirtualDOM #ComponentLifecycle #Redux #MobX #StyledComponents #Webpack #Babel #UIUXDesign #FrontEndArchitecture #WebDevTools #ComponentPatterns #FrontEndFrameworks #WebAccessibility #ReactInterviewQuestions #CodingChallenges #FrontEndSkills #DebuggingReact #ReactBestPractices
ReactJs is a popular JavaScript library for building user interfaces. It is maintained by Facebook, and is widely used for building web applications, mobile apps, and other user interfaces. React allows developers to create reusable components, which can help make large applications easier to manage and maintain. It is designed to be efficient, declarative, and flexible, and can be used to create complex, dynamic user interfaces.
React creates a virtual DOM. When the state changes in a component it first runs a "diffing" algorithm, which identifies what has changed in the virtual DOM. The second step is reconciliation, where it updates the DOM with the results of diff.
Virtual DOM: React introduces a Virtual DOM, which is an abstract representation of the actual DOM (Document Object Model). When there are changes in the component's state or props, React doesn't directly manipulate the real DOM. Instead, it creates a virtual representation of the changes and compares it with the previous virtual DOM to determine the minimal set of updates needed.
Reconciliation: React uses a process called reconciliation to update the actual DOM efficiently. During this process, it compares the previous virtual DOM with the new one and calculates the differences (diffing). It then applies only those differences to the real DOM, reducing the number of costly DOM manipulations.Please do like share and comment if you like the video please do hit like and if you have any query please write it comment box
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