React Tutorial - GeeksforGeeks

<!DOCTYPE html>    <html lang="en-US" prefix="og: http://ogp.me/ns#" >  <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=3.0"> <link rel="shortcut icon" href="https://media.geeksforgeeks.org/wp-content/cdn-uploads/gfg_favicon.png" type="image/x-icon" /> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <meta name="theme-color" content="#308D46" /> <meta name='robots' content='index, follow, max-image-preview:large, max-snippet:-1' /> <meta name="image" property="og:image" content="https://media.geeksforgeeks.org/wp-content/cdn-uploads/gfg_200x200-min.png"> <meta property="og:image:type" content="image/png"> <meta property="og:image:width" content="200"> <meta property="og:image:height" content="200"> <meta name="facebook-domain-verification" content="xo7t4ve2wn3ywfkjdvwbrk01pvdond" /> <meta property="og:title" content="React Tutorial - GeeksforGeeks" /> <meta name="description" content="React is a popular JavaScript library for building fast, efficient, and scalable user interfaces using a component-based architecture and Virtual DOM, making it ideal for Single Page Applications." /> <meta property="og:url" content="https://www.geeksforgeeks.org/react/" /> <meta name="keywords" content="React, JavaScript Library, front-end development, component-based architecture, Single Page Applications, Virtual DOM, JSX, one-way data flow, React Tutorial, React Hooks, React Router, state management, React performance, user experience, React interview questions" /> <meta property="og:site_name" content="GeeksforGeeks" /> <meta property="og:image" content="https://media.geeksforgeeks.org/wp-content/cdn-uploads/gfg_200x200-min.png" /> <meta property="article:section" content="Web Technologies" /> <meta property="article:tag" content="Web-Tech Tutorials" /> <meta property="og:type" content="article" /> <meta property="og:locale" content="en_US" /> <meta property="article:published_time" content="2023-12-27 17:34:11+00:00" /> <meta property="article:modified_time" content="2024-12-16 18:56:20+00:00" /> <meta property="og:updated_time" content="2024-12-16 18:56:20+00:00" /> <meta property="og:image:secure_url" content="https://media.geeksforgeeks.org/wp-content/cdn-uploads/gfg_200x200-min.png" /> <meta property="og:description" content="React is a popular JavaScript library for building fast, efficient, and scalable user interfaces using a component-based architecture and Virtual DOM, making it ideal for Single Page Applications." /> <script src="https://cdnads.geeksforgeeks.org/synchronously_gfg_ads.min.js"></script> <script defer src="https://apis.google.com/js/platform.js"></script>        <script> var IHPWT={}; //Initialize Namespace var pbjs = pbjs || {}; pbjs.que = pbjs.que || []; var googletag = googletag || {}; googletag.cmd = googletag.cmd || []; var gptRan = false; </script> <script defer src="https://ads.pubmatic.com/AdServer/js/pwt/162080/12331/pwt.js"></script> <script defer src="https://securepubads.g.doubleclick.net/tag/js/gpt.js"></script> <script defer src="https://cdnads.geeksforgeeks.org/prebid.js?ver=0.1"></script> <script defer src="https://cdnads.geeksforgeeks.org/gfg_ads.min.js?ver=0.1"></script> <script> var video_api_response = JSON.parse("{\"id\":10667,\"title\":\"React Introduction\",\"slug\":\"react-introduction\",\"description\":\"<h2>ReactJS Introduction | Comprehensive Guide<\/h2><p><strong>ReactJS<\/strong> is a popular JavaScript library used for building user interfaces, particularly for single-page applications (SPAs). It allows developers to create reusable UI components that manage their own state, making the process of building complex interfaces more efficient and maintainable. React was developed by Facebook and is maintained by both Facebook and a large community of developers.<\/p><h3>What is ReactJS?<\/h3><p><strong>ReactJS<\/strong>, often simply called <strong>React<\/strong>, is an open-source JavaScript library designed for building dynamic and interactive web applications. It focuses on creating fast and scalable front-end applications by using a component-based architecture.<\/p><p>React allows developers to build web applications where data can change dynamically without the need to reload the page. This is achieved through the use of components, which are the building blocks of a React application.<\/p><h3>Key Features of ReactJS<\/h3><p><strong>Component-Based Architecture<\/strong>:<\/p><ul><li>React applications are made up of multiple components, each responsible for rendering a small, reusable piece of HTML. These components can be nested within each other to build more complex interfaces.<\/li><\/ul><p><strong>Virtual DOM<\/strong>:<\/p><ul><li>React uses a <strong>Virtual DOM<\/strong>, which is a lightweight copy of the actual DOM. When a component\u2019s state changes, React updates the virtual DOM first, and then efficiently updates only the parts of the actual DOM that changed. This improves the performance of web applications.<\/li><\/ul><p><strong>JSX (JavaScript XML)<\/strong>:<\/p><ul><li>React uses <strong>JSX<\/strong>, a syntax that allows developers to write HTML within JavaScript. JSX makes it easier to write and visualize the structure of the UI within the same codebase.<\/li><\/ul><p><strong>Unidirectional Data Flow<\/strong>:<\/p><ul><li>React follows a <strong>unidirectional data flow<\/strong>, meaning data flows from parent to child components through props. This structure makes it easier to manage and debug applications by tracing how data moves through the application.<\/li><\/ul><p><strong>Declarative UI<\/strong>:<\/p><ul><li>With React, developers can describe the UI based on the current state of the application. React automatically updates and renders the necessary components when the state changes, which makes it easier to reason about the code.<\/li><\/ul><p><strong>React Hooks<\/strong>:<\/p><ul><li>Hooks are functions introduced in React 16.8 that let developers use state and other React features without writing classes. Common hooks include useState, useEffect, and useContext.<\/li><\/ul><h3>Benefits of ReactJS<\/h3><p><strong>Reusable Components<\/strong>:<\/p><ul><li>One of the core principles of React is its <strong>component-based architecture<\/strong>. Components can be reused across different parts of an application, reducing duplication and improving consistency.<\/li><\/ul><p><strong>Improved Performance<\/strong>:<\/p><ul><li>React\u2019s <strong>Virtual DOM<\/strong> helps in updating only the components that changed rather than reloading the entire DOM. This results in faster rendering and better performance, especially in large applications.<\/li><\/ul><p><strong>Strong Community Support<\/strong>:<\/p><ul><li>React is maintained by Facebook and has a massive community of developers contributing to its growth. This makes it easy to find resources, tutorials, and libraries that extend React\u2019s functionality.<\/li><\/ul><p><strong>SEO-Friendly<\/strong>:<\/p><ul><li>React can be rendered on the server using <strong>ReactDOMServer<\/strong>, allowing search engines to easily crawl the content of the page, improving SEO.<\/li><\/ul><p><strong>Rich Ecosystem<\/strong>:<\/p><ul><li>React has a rich ecosystem of tools and libraries, such as React Router for routing and Redux for state management, which makes it highly versatile and extendable.<\/li><\/ul><h3>Use Cases of ReactJS<\/h3><p><strong>Single Page Applications (SPAs)<\/strong>:<\/p><ul><li>React is often used for building single-page applications where the content dynamically updates without the need for a full-page reload.<\/li><\/ul><p><strong>Dynamic Web Applications<\/strong>:<\/p><ul><li>Any web application that needs to handle dynamic data, such as social media platforms, e-commerce websites, or dashboards, can benefit from React\u2019s efficient rendering system.<\/li><\/ul><p><strong>Mobile Applications<\/strong>:<\/p><ul><li>With <strong>React Native<\/strong>, developers can build mobile applications for iOS and Android using React\u2019s architecture and component-based approach.<\/li><\/ul><p><strong>Progressive Web Apps (PWAs)<\/strong>:<\/p><ul><li>React can be used to build Progressive Web Apps, which offer a native app-like experience with features like offline access and push notifications.<\/li><\/ul><h3>Why Learn ReactJS?<\/h3><p>ReactJS has become one of the most widely used libraries for front-end development due to its flexibility, efficiency, and ease of use. Whether you're building small websites or large-scale enterprise applications, React provides the tools and ecosystem to create maintainable, scalable, and performant web applications. By learning React, developers gain the skills necessary to work on cutting-edge projects and build fast, interactive user interfaces.<\/p><p><strong>Topics Covered<\/strong>:<\/p><p><strong>Key Features of React<\/strong>: Components, Virtual DOM, JSX, and more.<\/p><p><strong>Benefits of Using ReactJS<\/strong>: Reusability, performance, community support, and SEO benefits.<\/p><p><strong>Applications of ReactJS<\/strong>: SPAs, dynamic web applications, mobile apps, and PWAs.<\/p><p>For more details and further examples, check out the full article on GeeksforGeeks: <a href=\\\"https:\/\/www.geeksforgeeks.org\/reactjs-introduction\/\\\">https:\/\/www.geeksforgeeks.org\/reactjs-introduction\/<\/a>.<\/p>\",\"source\":\"https:\/\/videos.geeksforgeeks.org\/ec9796f0d0dea6a50fa2d45a6ca8d835gfg-WhyReact20241008152425\/video.m3u8\",\"category\":[{\"term_id__id\":91,\"term_id__term_name\":\"Web Development\",\"term_id__term_type\":1,\"term_id__slug\":\"web-development\"},{\"term_id__id\":232,\"term_id__term_name\":\"React JS\",\"term_id__term_type\":2,\"term_id__slug\":\"react-js\"},{\"term_id__id\":449,\"term_id__term_name\":\"web-technology\",\"term_id__term_type\":2,\"term_id__slug\":\"web-technology\"}],\"video_type\":\"geeksforgeeks\",\"meta\":{\"thumbnail\":\"https:\/\/media.geeksforgeeks.org\/geeksforgeeks\/ReactIntroduction\/ReactIntroduction20241008152420-small.png\",\"largeThumbnail\":\"https:\/\/media.geeksforgeeks.org\/geeksforgeeks\/ReactIntroduction\/ReactIntroduction20241008152420.jpg\",\"likes\":0,\"views\":14730,\"isFeatured\":0,\"isPremium\":0,\"isPublic\":0,\"format\":\"video\/mp4\",\"revision\":{}},\"time\":\"08\/10\/2024\",\"seo\":{\"description\":\"<h2>ReactJS Introduction | Comprehensive Guide<\/h2><p><strong>ReactJS<\/stro\",\"thumbnail\":\"https:\/\/media.geeksforgeeks.org\/geeksforgeeks\/ReactIntroduction\/ReactIntroduction20241008152420-seo.png\"},\"subtitle\":\"https:\/\/videos.geeksforgeeks.org\/ec9796f0d0dea6a50fa2d45a6ca8d835gfg-WhyReact20241008152425\/subtitle.vtt\",\"duration\":966,\"post_list\":[{\"post_id\":159349,\"post_title\":\"React Introduction\"},{\"post_id\":1107997,\"post_title\":\"React Tutorial\"},{\"post_id\":1202910,\"post_title\":\"Why should you Choose React Instead of JavaScript ?\"}],\"course_link\":\"https:\/\/www.geeksforgeeks.org\/courses\/react-js-beginner-to-advance\",\"views\":\"14730\",\"video_schema\":{\"@context\":\"https:\/\/schema.org\",\"@type\":\"VideoObject\",\"name\":\"React Introduction\",\"description\":\"ReactJS Introduction Comprehensive GuideReactJS is a popular JavaScript library used for building user interfaces, particularly for single-page applications (SPAs). It allows developers to create reusable UI components that manage their own state, making the process of building complex interfaces more efficient and maintainable. React was developed by Facebook and is maintained by both Facebook and a large community of developers.What is ReactJS?ReactJS, often simply called React, is an open-source JavaScript library designed for building dynamic and interactive web applications. It focuses on creating fast and scalable front-end applications by using a component-based architecture.React allows developers to build web applications where data can change dynamically without the need to reload the page. This is achieved through the use of components, which are the building blocks of a React application.Key Features of ReactJSComponent-Based ArchitectureReact applications are made up of multiple components, each responsible for rendering a small, reusable piece of HTML. 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React automatically updates and renders the necessary components when the state changes, which makes it easier to reason about the code.React HooksHooks are functions introduced in React 16.8 that let developers use state and other React features without writing classes. Common hooks include useState, useEffect, and useContext.Benefits of ReactJSReusable ComponentsOne of the core principles of React is its component-based architecture. Components can be reused across different parts of an application, reducing duplication and improving consistency.Improved PerformanceReacts Virtual DOM helps in updating only the components that changed rather than reloading the entire DOM. This results in faster rendering and better performance, especially in large applications.Strong Community SupportReact is maintained by Facebook and has a massive community of developers contributing to its growth. This makes it easy to find resources, tutorials, and libraries that extend Reacts functionality.SEO-FriendlyReact can be rendered on the server using ReactDOMServer, allowing search engines to easily crawl the content of the page, improving SEO.Rich EcosystemReact has a rich ecosystem of tools and libraries, such as React Router for routing and Redux for state management, which makes it highly versatile and extendable.Use Cases of ReactJSSingle Page Applications (SPAs)React is often used for building single-page applications where the content dynamically updates without the need for a full-page reload.Dynamic Web ApplicationsAny web application that needs to handle dynamic data, such as social media platforms, e-commerce websites, or dashboards, can benefit from Reacts efficient rendering system.Mobile ApplicationsWith React Native, developers can build mobile applications for iOS and Android using Reacts architecture and component-based approach.Progressive Web Apps (PWAs)React can be used to build Progressive Web Apps, which offer a native app-like experience with features like offline access and push notifications.Why Learn ReactJS?ReactJS has become one of the most widely used libraries for front-end development due to its flexibility, efficiency, and ease of use. Whether youre building small websites or large-scale enterprise applications, React provides the tools and ecosystem to create maintainable, scalable, and performant web applications. By learning React, developers gain the skills necessary to work on cutting-edge projects and build fast, interactive user interfaces.Topics CoveredKey Features of React Components, Virtual DOM, JSX, and more.Benefits of Using ReactJS Reusability, performance, community support, and SEO benefits.Applications of ReactJS SPAs, dynamic web applications, mobile apps, and PWAs.For more details and further examples, check out the full article on GeeksforGeeks httpswww.geeksforgeeks.orgreactjs-introduction.\",\"thumbnailUrl\":[\"https:\/\/media.geeksforgeeks.org\/geeksforgeeks\/ReactIntroduction\/ReactIntroduction20241008152420-seo.png\",\"https:\/\/media.geeksforgeeks.org\/geeksforgeeks\/ReactIntroduction\/ReactIntroduction20241008152420.jpg\",\"https:\/\/media.geeksforgeeks.org\/geeksforgeeks\/ReactIntroduction\/ReactIntroduction20241008152420-small.png\"],\"uploadDate\":\"2024-10-08T15:26:44Z\",\"duration\":\"PT0H16M6S\",\"contentUrl\":\"https:\/\/www.geeksforgeeks.org\/videos\/react-introduction\/\"}}"); </script>  <script defer src="https://assets.geeksforgeeks.org/codetabs/v3/codetabs.js" environment="production" domain="gfg" no-scroll></script> <title>React Tutorial - GeeksforGeeks</title> <link rel="profile" href="http://gmpg.org/xfn/11" /> <link rel="pingback" href="" />   <script type="application/ld+json">{"@context":"https://schema.org","@type":"VideoObject","name":"React Introduction","description":"ReactJS Introduction Comprehensive GuideReactJS is a popular JavaScript library used for building user interfaces, particularly for single-page applications (SPAs). 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These components can be nested within each other to build more complex interfaces.Virtual DOMReact uses a Virtual DOM, which is a lightweight copy of the actual DOM. When a components state changes, React updates the virtual DOM first, and then efficiently updates only the parts of the actual DOM that changed. This improves the performance of web applications.JSX (JavaScript XML)React uses JSX, a syntax that allows developers to write HTML within JavaScript. JSX makes it easier to write and visualize the structure of the UI within the same codebase.Unidirectional Data FlowReact follows a unidirectional data flow, meaning data flows from parent to child components through props. This structure makes it easier to manage and debug applications by tracing how data moves through the application.Declarative UIWith React, developers can describe the UI based on the current state of the application. React automatically updates and renders the necessary components when the state changes, which makes it easier to reason about the code.React HooksHooks are functions introduced in React 16.8 that let developers use state and other React features without writing classes. Common hooks include useState, useEffect, and useContext.Benefits of ReactJSReusable ComponentsOne of the core principles of React is its component-based architecture. Components can be reused across different parts of an application, reducing duplication and improving consistency.Improved PerformanceReacts Virtual DOM helps in updating only the components that changed rather than reloading the entire DOM. This results in faster rendering and better performance, especially in large applications.Strong Community SupportReact is maintained by Facebook and has a massive community of developers contributing to its growth. This makes it easy to find resources, tutorials, and libraries that extend Reacts functionality.SEO-FriendlyReact can be rendered on the server using ReactDOMServer, allowing search engines to easily crawl the content of the page, improving SEO.Rich EcosystemReact has a rich ecosystem of tools and libraries, such as React Router for routing and Redux for state management, which makes it highly versatile and extendable.Use Cases of ReactJSSingle Page Applications (SPAs)React is often used for building single-page applications where the content dynamically updates without the need for a full-page reload.Dynamic Web ApplicationsAny web application that needs to handle dynamic data, such as social media platforms, e-commerce websites, or dashboards, can benefit from Reacts efficient rendering system.Mobile ApplicationsWith React Native, developers can build mobile applications for iOS and Android using Reacts architecture and component-based approach.Progressive Web Apps (PWAs)React can be used to build Progressive Web Apps, which offer a native app-like experience with features like offline access and push notifications.Why Learn ReactJS?ReactJS has become one of the most widely used libraries for front-end development due to its flexibility, efficiency, and ease of use. Whether youre building small websites or large-scale enterprise applications, React provides the tools and ecosystem to create maintainable, scalable, and performant web applications. By learning React, developers gain the skills necessary to work on cutting-edge projects and build fast, interactive user interfaces.Topics CoveredKey Features of React Components, Virtual DOM, JSX, and more.Benefits of Using ReactJS Reusability, performance, community support, and SEO benefits.Applications of ReactJS SPAs, dynamic web applications, mobile apps, and PWAs.For more details and further examples, check out the full article on GeeksforGeeks httpswww.geeksforgeeks.orgreactjs-introduction.","thumbnailUrl":["https://media.geeksforgeeks.org/geeksforgeeks/ReactIntroduction/ReactIntroduction20241008152420-seo.png","https://media.geeksforgeeks.org/geeksforgeeks/ReactIntroduction/ReactIntroduction20241008152420.jpg","https://media.geeksforgeeks.org/geeksforgeeks/ReactIntroduction/ReactIntroduction20241008152420-small.png"],"uploadDate":"2024-10-08T15:26:44Z","duration":"PT0H16M6S","contentUrl":"https://www.geeksforgeeks.org/videos/react-introduction/"}</script>   <script type="application/ld+json"> { "@context": "https://schema.org", "@type": "Article", "mainEntityOfPage": { "@type": "WebPage", "id": "https://www.geeksforgeeks.org/react/" }, "headline": "React Tutorial", "datePublished": "2023-12-27 05:34:11", "dateModified": "2024-12-16 06:56:20", "image": { "@type": "ImageObject", "url": "https://media.geeksforgeeks.org/wp-content/uploads/20240701151251/react-tutorial-copy-2.webp", "width": "1000", "height": "470" }, "author": { "@type": "Organization", "name": "GeeksforGeeks", "url": "https://www.geeksforgeeks.org/", "logo": { "@type": "ImageObject", "url": "https://media.geeksforgeeks.org/wp-content/cdn-uploads/logo-new-2.svg", "width": "301", "height": "40" } }, "publisher": { "@type": "Organization", "name": "GeeksforGeeks", "url": "https://www.geeksforgeeks.org/", "logo": { "@type": "ImageObject", "url": "https://media.geeksforgeeks.org/wp-content/cdn-uploads/logo-new-2.svg", "width": "301", "height": "40" } }, "description": "React is a JavaScript Library known for front-end development (or user interface). 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class="text"> <p dir="ltr"><span>React</span><b><strong> </strong></b><span>is a </span><b><strong>JavaScript Library</strong></b><span> known for front-end development (or user interface). It is popular due to its </span><b><strong>component-based architecture</strong></b><span>,</span><b><strong> Single Page Applications (SPAs) </strong></b><span>and</span><b><strong> Virtual DOM </strong></b><span>for building web applications that are fast, efficient, and scalable.</span></p><ul><li value="1"><span>Applications are built using reusable </span><a href="https://www.geeksforgeeks.org/reactjs-components/" target="_blank" rel="noopener"><span>components</span></a><span> that enable the reload of only the changed part of the UI. Hence we get a better user experience with React.</span></li><li value="2"><span>Allows you to describe how the UI should look based on the state of your application.</span></li><li value="3"><span>Uses a </span><a href="https://www.geeksforgeeks.org/reactjs-virtual-dom/" target="_blank" rel="noopener"><span>virtual DOM </span></a><span>to optimize updates, making applications faster and more efficient.</span></li><li value="4"><span>Enforces a </span><a href="https://www.geeksforgeeks.org/reactjs-unidirectional-data-flow/" target="_blank" rel="noopener"><span>one-way data flow</span></a><span>, making the application predictable and easier to debug.</span></li><li value="5"><span>It uses </span><a href="https://www.geeksforgeeks.org/reactjs-jsx-introduction/" target="_blank" rel="noopener"><span>JSX </span></a><span>which combines HTML-like syntax with JavaScript's functionality, making it easy to shift to React from JavaScript.</span></li></ul><p dir="ltr"><b><strong>To Start with React you need to install it in your project. Follow these articles to install depending on your system</strong></b></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/how-to-install-reactjs-on-windows/" target="_blank" rel="noopener"><span>How to Install ReactJS on Windows</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/how-to-install-reactjs-on-macos/" target="_blank" rel="noopener"><span>How to Install ReactJS on MacOS</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/how-to-install-reactjs-on-linux/" target="_blank" rel="noopener"><span>How to Install ReactJS on Linux</span></a></li></ul><p dir="ltr"><span>Let us now take a look at our first code example.</span></p><gfg-tabs allow-code-exec=true data-run-ide="false" data-mode="light"> <gfg-tab slot="tab">JavaScript</gfg-tab> <gfg-panel slot="panel" data-code-lang="javascript" data-main-code-start="None" data-main-code-end="None"> <code class="language-javascript"><div class=highlight><pre><span></span><span class=k>import</span><span class=w> </span><span class=nx>React</span><span class=w> </span><span class=kr>from</span><span class=w> </span><span class=s1>'react'</span><span class=p>;</span> <span class=kd>function</span><span class=w> </span><span class=nx>App</span><span class=p>()</span><span class=w> </span><span class=p>{</span> <span class=w> </span><span class=k>return</span><span class=w> </span><span class=p>(</span> <span class=w> </span><span class=o><</span><span class=nx>div</span><span class=o>></span> <span class=w> </span><span class=o><</span><span class=nx>h1</span><span class=o>></span><span class=nx>Welcome</span><span class=w> </span><span class=nx>To</span><span class=w> </span><span class=nx>React</span><span class=w> </span><span class=nx>Tutorial</span><span class=o><</span><span class=err>/h1></span> <span class=w> </span><span class=o><</span><span class=err>/div></span> <span class=w> </span><span class=p>);</span> <span class=p>}</span> <span class=k>export</span><span class=w> </span><span class=k>default</span><span class=w> </span><span class=nx>App</span><span class=p>;</span> </pre></div></code> </gfg-panel></gfg-tabs><blockquote><p dir="ltr"><span>It will print </span><b><strong>'Welcome To React Tutorial' </strong></b><span>in the Browser.</span></p></blockquote><ul><li value="1"><span>JSX looks like HTML but is JavaScript. <div> and <h1> are React elements created under the hood.</span></li><li value="2"><span>Every tag in JSX (like <h1> or <div>) must be properly closed, including self-closing ones like <img />.</span></li><li value="3"><span>All returned elements must be inside one parent (e.g., the <div> here).</span></li><li value="4"><span>App is a function that returns the UI. It鈥檚 exported so it can be used elsewhere.</span></li><li value="5"><b><strong>import React from 'react';</strong></b><span> is required to use JSX, as JSX is transformed into JavaScript using React.</span></li></ul><h2><b><strong>Why Learn React JS?</strong></b></h2><p dir="ltr" style="text-align: justify;"><span>React, the popular JavaScript library, offers several exciting reasons for developers to learn it. </span></p><ul><li value="1"><b><strong>Flexibility: </strong></b><span>React allows you to build high-quality user interfaces across different platforms, thanks to its flexible library approach.</span></li><li value="2"><b><strong>Great Developer Experience:</strong></b><span> React makes it easier to write and understand code, offering a smooth development process.</span></li><li value="3"><b><strong>Strong Support from Facebook: </strong></b><span>Regular updates, bug fixes, and resources from Facebook ensure React stays up-to-date and reliable.</span></li><li value="4"><b><strong>Vast Community Support:</strong></b><span> React benefits from a large community, providing enough resources, tutorials, and troubleshooting help.</span></li><li value="5"><b><strong>Excellent Performance:</strong></b><span> React鈥檚 efficient Virtual DOM ensures fast rendering and high performance for web applications.</span></li><li value="6"><b><strong>Easy Testing:</strong></b><span> React鈥檚 structure and tools make testing simpler, improving code reliability and maintainability.</span></li></ul><p dir="ltr"><span>One of the most effective ways to solidify your understanding is through practical application. That's where structured learning comes into play. For those looking to deepen their React skills and progress from beginner to advanced levels, consider enrolling in the course on </span><a href="https://gfgcdn.com/tu/St7/" target="_blank" rel=""><span>React JS: Beginner to Advanced</span></a><span> offered by GeeksforGeeks. This comprehensive course provides hands-on projects and real-world applications, making it an excellent resource for anyone serious about mastering React.</span></p><p dir="ltr"><b><strong>React Tutorial Prerequisites: </strong></b><a href="https://www.geeksforgeeks.org/html-tutorial" target="_blank" rel="noopener"><span>HTML</span></a><span>, </span><a href="https://www.geeksforgeeks.org/css-tutorial" target="_blank" rel="noopener"><span>CSS</span></a><span> and </span><a href="https://www.geeksforgeeks.org/javascript" target="_blank" rel="noopener"><span>JavaScript</span></a></p><h3 id="react-basic-concepts"><span>React Basic Concepts</span></h3><p dir="ltr"><span>Introduction to the Fundamentals of React form importing, exporting modules, creating components, to managing data flow and rendering UI across the application.</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/reactjs-introduction" rel="noopener"><span>Introduction</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/reactjs-importing-exporting" rel="noopener"><span>Import and Export</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/reactjs-jsx-introduction" rel="noopener"><span>JSX Introduction</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/reactjs-components" rel="noopener"><span>Components</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/reactjs-conditional-rendering" rel="noopener"><span>Conditional Rendering</span></a></li><li value="6"><a href="https://www.geeksforgeeks.org/reactjs-proptypes" rel="noopener"><span>PropTypes</span></a></li><li value="7"><a href="https://www.geeksforgeeks.org/what-is-prop-drilling-and-how-to-avoid-it" rel="noopener"><span>Prop Drilling</span></a></li><li value="8"><a href="https://www.geeksforgeeks.org/reactjs-lists" rel="noopener"><span>React Lists</span></a></li><li value="9"><a href="https://www.geeksforgeeks.org/explain-new-context-api-in-react" rel="noopener"><span>Context API</span></a></li><li value="10"><a href="https://www.geeksforgeeks.org/introduction-to-react-redux" rel="noopener"><span>React Redux</span></a></li></ul><h3 id="react-hooks"><span>React Hooks</span></h3><p dir="ltr"><span>Different hooks to access and mange state and lifecycle in functional components.</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/reactjs-hooks" rel="noopener"><span>Hooks Introduction</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/reactjs-usestate-hook" rel="noopener"><span>useState Hook</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/reactjs-useeffect-hook" rel="noopener"><span>useEffect Hook</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/react-js-useref-hook" rel="noopener"><span>useRef Hook</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/react-js-usememo-hook" rel="noopener"><span>useMemo Hook</span></a></li><li value="6"><a href="https://www.geeksforgeeks.org/reactjs-usecontext-hook" rel="noopener"><span>useContext Hook</span></a></li></ul><h3 id="react-dom-events"><b><strong>React DOM Events</strong></b></h3><p dir="ltr"><span>Handle DOM events in react like mouse, keyboard and form events.</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/react-js-events" rel="noopener"><span>React Events Introduction</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/what-is-onclickcapture-event-in-reactjs" rel="noopener"><span>onclickcapture Event</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/react-onmousedown-event" rel="noopener"><span>onMouseDown Event</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/react-ondoubleclick-event" rel="noopener"><span>onDoubleClick Event</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/react-onsubmit-event" rel="noopener"><span>onSubmit Event</span></a></li><li value="6"><a href="https://www.geeksforgeeks.org/react-onscroll-event" rel="noopener"><span>onScroll Event</span></a></li><li value="7"><a href="https://www.geeksforgeeks.org/react-onblur-event" rel="noopener"><span>onBlur Event</span></a></li></ul><h3 id="lifecycle-of-components"><b><strong>Lifecycle of Components</strong></b></h3><p dir="ltr"><span>The lifecycle of react components from creation, mounting and unmounting to manage the different phases.</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/reactjs-lifecycle-components" rel="noopener"><span>Introduction to lifecycle of components</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/react-js-constructor-method" rel="noopener"><span>constructor</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/react-js-render-method" rel="noopener"><span>render</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/reactjs-componentdidmount-method" rel="noopener"><span>componentDidMount</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/reactjs-componentwillunmount-method" rel="noopener"><span>componentWillUnmount</span></a></li><li value="6"><a href="https://www.geeksforgeeks.org/reactjs-componentdidcatch-method" rel="noopener"><span>componentDidCatch</span></a></li><li value="7"><a href="https://www.geeksforgeeks.org/reactjs-componentdidupdate-method" rel="noopener"><span>componentDidUpdate</span></a></li><li value="8"><a href="https://www.geeksforgeeks.org/reactjs-shouldcomponentupdate-method" rel="noopener"><span>shouldComponentUpdate</span></a></li></ul><h3 id="routing-in-react"><span>Routing in React</span></h3><p dir="ltr"><span>Manage navigation and routing within the single page application.</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/reactjs-router/" target="_blank" rel=""><span>React JS Router</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/what-is-react-router-dom/" target="_blank" rel=""><span>What is react-router-dom?</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/reactjs-types-of-routers/" target="_blank" rel=""><span>React JS Types of Routers</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/react-router-hooks/" target="_blank" rel=""><span>React-Router Hooks</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/mastering-react-routing-learn-navigation-and-routing-in-react-apps/" target="_blank" rel=""><span>Learn Navigation and Routing in React Apps</span></a></li><li value="6"><a href="https://www.geeksforgeeks.org/link-and-navlink-components-in-react-router-dom/" target="_blank" rel=""><span>Link and NavLink components in React-Router-Dom</span></a></li></ul><h3 id="important-react-packages"><span>Important React Packages</span></h3><p dir="ltr"><span>Additional libraries for styling and state management to enhance your react projects.</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/introduction-to-react-redux" rel="noopener"><span>Redux</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/react-material-ui" rel="noopener"><span>Material UI</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/react-bootstrap" rel="noopener"><span>react-bootstrap</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/tailwind-css" rel="noopener"><span>Tailwind</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/framer-motion-introduction-and-installation" rel="noopener"><span>Framer Motion</span></a></li></ul><h3 id="react-interview-questions"><span>React Interview Questions</span></h3><p dir="ltr"><span>React Interview questions categorised for different levels including most asked questions.</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/reactjs-interview-questions-and-answers" rel="noopener"><span>Beginner Level Interview Questions (2024)</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/reactjs-interview-questions-and-answers-intermediate-level" rel="noopener"><span>Intermediate Level Interview Questions (2024)</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/reactjs-interview-question-and-answers-advance-level" rel="noopener"><span>Advanced Level Interview Questions (2024)</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/7-most-asked-reactjs-interview-questions-answers" rel="noopener"><span>7 Most Asked ReactJS Interview Questions</span></a></li></ul><h3 id="react-online-quizs"><span>React Online Quizs</span></h3><p dir="ltr"><span>Test and Improve your knowledge with the well organised React Quizs</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/react-js-quiz-set-1" rel="noopener"><span>Set-1</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/react-js-quiz-set-2" rel="noopener"><span>Set-2</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/react-js-quiz-set-3" rel="noopener"><span>Set-3</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/reactjs-quiz-set-4" rel="noopener"><span>Set-4</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/quizzes/reactjs-quiz-set-5/" target="_blank" rel="noopener"><span>Set-5</span></a></li><li value="6"><a href="https://www.geeksforgeeks.org/quizzes/reactjs-quiz-set-6/" target="_blank" rel="noopener"><span>Set-6</span></a></li></ul><h3 id="react-online-practice-exercise"><span>React Online Practice Exercise</span></h3><p dir="ltr"><span>Embark on your React learning journey with our online practice portal. Start by selecting quizzes tailored to your skill level. Engage in hands-on coding exercises, receive real-time feedback, and monitor your progress. With our user-friendly platform, mastering React becomes an enjoyable and personalized experience. </span></p><blockquote><p dir="ltr"><span>Elevate your coding expertise by going through our carefully curated </span><a href="https://www.geeksforgeeks.org/practice-react-online" rel="noopener"><span>Free Online React Exercises.</span></a></p></blockquote><h3 id="react-complete-references"><span>React Complete References</span></h3><p dir="ltr"><span>Refer to the following articles to have a quick glance at all the important key concepts which are helpful while developing web applications using React</span></p><ul><li value="1"><a href="https://www.geeksforgeeks.org/reactjs-basics-concepts-complete-reference" rel="noopener"><span>Basic Concepts Reference</span></a></li><li value="2"><a href="https://www.geeksforgeeks.org/reactjs-components-complete-reference" rel="noopener"><span>Components Complete Reference</span></a></li><li value="3"><a href="https://www.geeksforgeeks.org/reactjs-props-complete-reference" rel="noopener"><span>Props Reference</span></a></li><li value="4"><a href="https://www.geeksforgeeks.org/react-events-reference" rel="noopener"><span>Events Reference</span></a></li><li value="5"><a href="https://www.geeksforgeeks.org/reactjs-hooks-complete-reference/" target="_blank" rel=""><span>Hooks Reference</span></a></li><li value="6"><a href="https://www.geeksforgeeks.org/reactjs-advanced-guides-complete-reference/" target="_blank" rel=""><span>Advanced Guide Reference</span></a></li></ul><p dir="ltr"><span>If you want to have a simple, quick reference to commonly used React methods you can refer to </span><a href="https://www.geeksforgeeks.org/react-cheat-sheet" rel="noopener"><span>ReactJS Cheat Sheet</span></a><span> article</span></p><h2><b><strong>Advantages of React</strong></b></h2><ul><li value="1"><b><strong>Composable:</strong></b><span> React allows building reusable components, improving code organization and maintainability.</span></li><li value="2"><b><strong>Declarative: </strong></b><span>React鈥檚 declarative approach makes it easy to design interactive UIs by changing component states, with React handling the DOM updates.</span></li><li value="3"><b><strong>SEO-Friendly:</strong></b><span> React鈥檚 Single Page Application (SPA) setup can be optimized for SEO by rendering and indexing content properly.</span></li><li value="4"><b><strong>Large Community:</strong></b><span> React has a strong community and is widely used by major companies like Meta, Netflix, making it easier to find resources and support.</span></li><li value="5"><b><strong>Easy to Learn:</strong></b><span> React uses JSX, which resembles HTML, making it simple for developers with basic knowledge of HTML, CSS, and JavaScript.</span></li><li value="6"><b><strong>Easy Debugging:</strong></b><span> React鈥檚 unidirectional data flow simplifies debugging by ensuring that data moves in a clear, predictable direction within components.</span></li></ul><p dir="ltr"><span>If you want to learn more refer to this article </span><a href="https://www.geeksforgeeks.org/what-are-the-advantages-of-react-js" rel="noopener"><span>React JS Advantages</span></a></p><h2 id="frequently-asked-questions-on-react"><span>React Tutorial - FAQ's</span></h2><h3 id="1-what-is-react-used-for"><span>What is React used for?</span></h3><blockquote><p dir="ltr"><span>The primary goal of React is to create a User Interface, Single-Page Application, Progressive Web Application and more.</span></p></blockquote><h3 id="2-which-language-is-used-in-react"><span>Which language is used in React?</span></h3><blockquote><p dir="ltr"><span>React used JavaScript programming language.</span></p></blockquote><h3 id="3-is-react-a-frontend-language"><span>Is React a front-end language?</span></h3><blockquote><p dir="ltr"><span>React globally used for Front-end JS library and it is popular with both software and project speoncer.</span></p></blockquote><h3 id="4-which-is-in-demand-reactjs-or-angulerjs-in-2024"><span>Which is in demand ReactJS or AngulerJS in 2024?</span></h3><blockquote><p dir="ltr"><span>React is far more popular than AngulerJS because ReactJS comes with more libraries, resources and bigger community support.</span></p></blockquote><h3 id="5-which-is-better-nodejs-or-reactjs-or-angularjs"><span>Which is better NodeJS or ReactJS or AngularJS</span></h3><blockquote><p dir="ltr"><span>Choosing the framework always depends very much on your requirements. All of these three frameworks are quite popular, and users choose them based on what they want to do. But if we do so more specifically, then ReatJS is better.</span></p></blockquote><h3 id="6-is-this-reactjs-tutorial-for-beginners-or-for-advanced"><span>Is this ReactJS tutorial for beginners or for advanced</span></h3><blockquote><p dir="ltr"><span>As we said at the beginning of this article, this course is for beginners as well as for advanced. </span></p></blockquote>  <div class='article_bottom_text'></div><br> <div id="video-tab-content" class="video-tab-content"> <div style="text-align: center; margin: 20px 0px;" id="GFG_AD_InContent_Desktop_728x280"></div> </div> <div class="d-row content-bw "style="margin-top: 20px;"> <div class="article-pgnavi_prev"><div class="comment_div" data-title="Comments"><button class="author_footer_btn" data-gfg-action="loadComments"> <div class='discussion_panel'> <i class='discussion_button'> </i> Comment </div></button></div><div class="trigger-div"><button class="author_footer_btn"><div class="more_info">More info<span class="more_info_uparrow gfg-icon gfg-icon_arrow-down-thin"></span></div></button></div> <a href="https://www.geeksforgeeks.org/about/contact-us/?listicles" target="_blank" class="advertise-with-us-div"><button class="advertise-with-us-btn"><span class="advertise-with-us-text">Advertise with us</span></button></a> </div> <div class="article-pgnavi_next"> <a href="https://www.geeksforgeeks.org/reactjs-introduction/?ref=next_article" class="pg-head"> <span>Next Article</span> <span class="gfg-icon gfg-icon_next"></span> </a>  <div class="pg-main"> <a href="https://www.geeksforgeeks.org/reactjs-introduction/?ref=next_article">React Introduction</a> </div> </div> </div> <div class="more-info hidden-div"> <div class="article-meta-author-details "> <div class="article-meta-author-details-block"> <div class="article-meta-author-details-profile-display"> <div class="author_info"> <div class="article-meta-author-details-profile-display-icon"> <a href="https://www.geeksforgeeks.org/user/shobhit__sharma/contributions/?itm_source=geeksforgeeks&itm_medium=article_author&itm_campaign=auth_user" style="text-decoration: none;"><div class="image-wrap" style="position: relative"><p class="profileCard-profile-picture" style="background-color:#B0DAFF; 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