React | What It Is & How I Use It

React is the JavaScript library that fundamentally changed how developers build user interfaces for the web. Maintained by Meta and a massive open-source community, React introduced the concept of declarative, component-based UI development, you describe what the interface should look like for a given state, and React figures out how to efficiently update the DOM. For custom web application development, React is the foundation I build on. Its component model makes it natural to break complex interfaces into reusable, testable pieces. Hooks provide a clean way to manage state, side effects, and context without class-based boilerplate. The ecosystem is enormous: React Router for navigation, React Query for server state, React Hook Form for forms, and hundreds of battle-tested libraries for every conceivable need. Combined with TypeScript, React produces codebases that are predictable, maintainable, and easy for future developers to understand.

How It Changed Everything

React was created by Jordan Walke, a software engineer at Facebook, in 2011. The original motivation was a very specific problem: Facebook's ads organization tool had become so complex that the team could no longer maintain it reliably. Every feature addition introduced cascading bugs because the UI state was deeply entangled. Walke built an early prototype called FaxJS that used a virtual DOM to manage updates predictably. React was first deployed on Facebook's News Feed in 2011 and then on Instagram in 2012. It was open-sourced at JSConf US in May 2013, where the initial reception was actually hostile, developers were outraged that React mixed HTML and JavaScript together with JSX, which violated the separation of concerns dogma at the time.

One Thing Most People Miss

When React was first open-sourced, it included a clause in its license called the "BSD + Patents" grant, which essentially said that if you sued Facebook for any patent infringement, you would lose your license to use React. This caused a firestorm in 2017 when the Apache Foundation banned its projects from using React. Facebook initially doubled down, but after WordPress announced it would rewrite its Gutenberg editor away from React, Facebook relicensed React under the standard MIT license within weeks, one of the fastest corporate open-source policy reversals in history.