{"id":735,"date":"2025-04-19T06:55:13","date_gmt":"2025-04-19T06:55:13","guid":{"rendered":"https:\/\/www.wordpress-prod.sharpener.tech\/?p=735"},"modified":"2025-07-07T12:32:33","modified_gmt":"2025-07-07T12:32:33","slug":"what-is-reactjs","status":"publish","type":"post","link":"https:\/\/www.sharpener.tech\/blog\/what-is-reactjs\/","title":{"rendered":"What is ReactJS? A Beginner\u2019s Guide [2025]"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.wordpress-prod.sharpener.tech\/wp-content\/uploads\/2025\/04\/What-is-ReactJS-A-Beginners-Guide-2025-1024x683.png\" alt=\"What is ReactJS A Beginner\u2019s Guide [2025]\" class=\"wp-image-736\" srcset=\"https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/04\/19064641\/What-is-ReactJS-A-Beginners-Guide-2025-1024x683.png 1024w, https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/04\/19064641\/What-is-ReactJS-A-Beginners-Guide-2025-300x200.png 300w, https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/04\/19064641\/What-is-ReactJS-A-Beginners-Guide-2025-768x512.png 768w, https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/04\/19064641\/What-is-ReactJS-A-Beginners-Guide-2025.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019ve ever wondered how modern websites and web apps look so fast and interactive, the answer is often <strong>ReactJS<\/strong>. ReactJS is one of the most popular tools used by web developers today.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this beginner\u2019s guide, you\u2019ll learn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What ReactJS is<br><\/li>\n\n\n\n<li>Why developers use it<br><\/li>\n\n\n\n<li>How it works<br><\/li>\n\n\n\n<li>What makes it different<br><\/li>\n\n\n\n<li>Where to start if you want to learn React in 2025<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s get started.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is ReactJS?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ReactJS<\/strong>, also known simply as <strong>React<\/strong>, is a <strong>JavaScript library<\/strong> used to build user interfaces. It was created by <strong>Facebook (now Meta)<\/strong> and is widely used to build modern web applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In simple terms:<br>React helps developers build websites that are <strong>fast<\/strong>, <strong>dynamic<\/strong>, and <strong>easy to manage<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Can You Build with React?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You can use React to build:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Social media platforms<br><\/li>\n\n\n\n<li>E-commerce websites<br><\/li>\n\n\n\n<li>Dashboards and admin panels<br><\/li>\n\n\n\n<li>Single-page applications (SPAs)<br><\/li>\n\n\n\n<li>Mobile apps (with React Native)<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Many popular websites like Facebook, Instagram, Netflix, and Airbnb use ReactJS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why is ReactJS So Popular in 2025?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">React continues to be one of the top JavaScript libraries in 2025. Here\u2019s why developers love it:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Easy to Learn<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">React has simple rules and uses plain JavaScript, which makes it beginner-friendly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Reusable Components<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">React lets you build <strong>components<\/strong> \u2014 small blocks of code you can reuse. This saves time and keeps code clean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. Fast Updates with Virtual DOM<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">React uses something called a <strong>Virtual DOM<\/strong>. This makes web pages update faster without reloading the whole screen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. Strong Community Support<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Because so many developers use React, there are tons of tutorials, forums, and free tools.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. Works with Other Tools<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">React works well with other JavaScript libraries and frameworks like Redux, Next.js, and Tailwind CSS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Key Features of ReactJS<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here are some important features that make React stand out:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Feature<\/strong><\/td><td><strong>What It Means<\/strong><\/td><\/tr><tr><td><strong>JSX (JavaScript XML)<\/strong><\/td><td>Lets you write HTML inside JavaScript<\/td><\/tr><tr><td><strong>Components<\/strong><\/td><td>Small, reusable building blocks<\/td><\/tr><tr><td><strong>Virtual DOM<\/strong><\/td><td>Makes apps run faster<\/td><\/tr><tr><td><strong>One-way Data Flow<\/strong><\/td><td>Data flows in one direction, which makes it easier to manage<\/td><\/tr><tr><td><strong>Hooks<\/strong><\/td><td>Let you use state and other features without writing a class<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How ReactJS Works \u2013 A Simple Example<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s say you want to build a button that counts how many times it&#8217;s clicked.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In normal JavaScript, you\u2019d write many lines of code.<br>In React, it could look like this:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">jsx<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CopyEdit<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">import { useState } from &#8216;react&#8217;;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">function Counter() {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;const [count, setCount] = useState(0);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;return (<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&lt;button onClick={() =&gt; setCount(count + 1)}&gt;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;You clicked {count} times<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;&lt;\/button&gt;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;&nbsp;);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That\u2019s it! You created a simple, interactive button using just a few lines of code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>ReactJS vs Other Frameworks<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">React is often compared to tools like <strong>Angular<\/strong> and <strong>Vue.js<\/strong>. Here\u2019s how they differ:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Feature<\/strong><\/td><td><strong>React<\/strong><\/td><td><strong>Angular<\/strong><\/td><td><strong>Vue<\/strong><\/td><\/tr><tr><td>Type<\/td><td>Library<\/td><td>Full framework<\/td><td>Framework<\/td><\/tr><tr><td>Learning Curve<\/td><td>Easy<\/td><td>Medium<\/td><td>Easy<\/td><\/tr><tr><td>Flexibility<\/td><td>High<\/td><td>Less flexible<\/td><td>Medium<\/td><\/tr><tr><td>Performance<\/td><td>Fast<\/td><td>Good<\/td><td>Good<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ReactJS<\/strong> gives more freedom, while Angular is more structured. Vue is beginner-friendly like React, but has fewer large companies using it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Should You Learn ReactJS in 2025?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes! If you want to become a <strong>frontend developer<\/strong>, ReactJS is a great skill to have.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Here\u2019s why:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Many job openings ask for React<br><\/li>\n\n\n\n<li>Used by top companies<br><\/li>\n\n\n\n<li>Works well with other modern tools<br><\/li>\n\n\n\n<li>Easy to start, yet powerful for big apps<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you\u2019re a student, a working professional, or switching careers, learning React in 2025 is a smart move.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What You Need Before Learning React<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before you dive into React, it\u2019s helpful to know:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>HTML<\/strong> \u2013 to build the structure of web pages<br><\/li>\n\n\n\n<li><strong>CSS<\/strong> \u2013 to style the pages<br><\/li>\n\n\n\n<li><strong>JavaScript (ES6+)<\/strong> \u2013 to write logic and manage data<br><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Once you understand those, you\u2019re ready to learn React.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ReactJS is one of the best tools for building modern websites and apps in 2025. It\u2019s simple enough for beginners and powerful enough for experts. Whether you&#8217;re starting your first project or looking to join a top tech company, React is a skill worth learning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sharpener<\/strong> offers a <a href=\"https:\/\/www.sharpener.tech\/courses\/\"><strong>Full Stack Development Course<\/strong><\/a> that covers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>HTML, CSS, JavaScript<\/li>\n\n\n\n<li>React, Node.js, MongoDB<\/li>\n\n\n\n<li>Real-world projects and live mentorship<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">What makes Sharpener special? <a href=\"https:\/\/www.sharpener.tech\/\"><strong>Pay After Placement<\/strong><\/a>. That means you can start learning now and focus on building skills without worrying about fees.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zero upfront payment<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Job-focused training<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;Designed for beginners and career switchers<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;<strong>Join Sharpener\u2019s Full Stack Course Now<\/strong> and launch your developer career confidently!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sharpenerian\u2019s work at the best companies!<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"429\" src=\"https:\/\/www.wordpress-prod.sharpener.tech\/wp-content\/uploads\/2025\/05\/Sharpener-works--1024x429.png\" alt=\"Sharpenerians work at the best companies\" class=\"wp-image-1059\" srcset=\"https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/05\/13092711\/Sharpener-works--1024x429.png 1024w, https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/05\/13092711\/Sharpener-works--300x126.png 300w, https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/05\/13092711\/Sharpener-works--768x321.png 768w, https:\/\/sharpener-wordpress.s3.ap-south-1.amazonaws.com\/blog\/wp-content\/uploads\/2025\/05\/13092711\/Sharpener-works-.png 1534w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/student.sharpener.tech\/register?blogName=what-is-reactjs\">Register Now<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019ve ever wondered how modern websites and web apps look so fast and interactive, the answer is often ReactJS. ReactJS is one of the most popular tools used by&hellip;<\/p>\n","protected":false},"author":4,"featured_media":736,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-735","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-full-stack"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is ReactJS ? A Beginner\u2019s Ultimate Guide [2025]<\/title>\n<meta name=\"description\" content=\"Learn what ReactJS is and why it\u2019s a top choice for web development in 2025. 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