React is an open-source JavaScript library for building user interfaces. It was created by Jordan Walke, a software engineer at Facebook, in 2011 as an internal tool to help developers create more efficient and dynamic user interfaces for Facebook's newsfeed.
React was first introduced to the public at the JSConf conference in May 2013, and it quickly gained popularity within the web development community. In 2015, Facebook released React as an open-source project, allowing developers all over the world to use and contribute to the library.
One of the key features of React is its use of a virtual DOM (Document Object Model), which allows it to efficiently update and re-render only the parts of a web page that need to be changed, rather than re-rendering the entire page. This makes React much faster and more efficient than traditional JavaScript libraries.
React has also gained popularity due to its component-based architecture, which allows developers to build complex user interfaces by breaking them down into smaller, reusable components. This makes it easier to manage code, collaborate on projects, and maintain consistency across different parts of a web application.
Today, React is widely used by developers all over the world, and it has become one of the most popular front-end JavaScript libraries, alongside Angular and Vue.js. It has been used to build some of the most popular websites and web applications, including Facebook, Instagram, Airbnb, Netflix, and many others.
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