React.js is a JavaScript library for building user interfaces. It allows developers to create interactive user interfaces by composing reusable UI components. React components are JavaScript functions that return what should appear on the screen. They receive data and return the corresponding UI elements. React updates the screen automatically when the data changes, making the UI responsive to user interactions. React uses JSX, a JavaScript syntax extension, to combine JavaScript logic with HTML-like syntax, making components easier to create, maintain, and delete.
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The website reactjs.org is built with 9 technologies.
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Analytics
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Tag managers
Google Tag Manager
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HSTS
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Miscellaneous
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PWA
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RSS
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PaaS
Vercel
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React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations.