React JS

React has been our default choice for JavaScript UI development since 2016, but with the stable release of React Compiler coming last October (as part of React 19), it's worth revisiting. There are a number of reasons this feature is notable. By handling memoization at build time, for example, it makes manual useMemo and useCallback largely unnecessary, though the team recommends keeping them as escape hatches when precise control over effect dependencies is required. Battle-tested at Meta and supported by Expo SDK 54, Vite and Next.js, the compiler also removes a category of performance boilerplate that has long been a cost of working at scale with React. React 19 also introduces Actions and hooks such as useActionState and useOptimistic, which simplify form handling and data mutations without relying on external libraries. The launch of the React Foundation under the Linux Foundation in 2025 — with Amazon, Expo, Callstack, Microsoft, Software Mansion and Vercel joining Meta — further strengthens the library's long-term stability and addresses a concern cautious teams have historically cited when considering adoption.

In the avalanche of front-end JavaScript frameworks, React.js stands out due to its design around a reactive data flow. Allowing only one-way data binding greatly simplifies the rendering logic and avoids many of the issues that commonly plague applications written with other frameworks. We're seeing the benefits of React.js on a growing number of projects, large and small, while at the same time we continue to be concerned about the state and the future of other popular frameworks like AngularJS. This has led to React.js becoming our default choice for JavaScript frameworks.

One benefit of the ongoing avalanche of front-end JavaScript frameworks is that occasionally a new idea crops up that makes us think. React.js is a UI/view framework in which JavaScript functions generate HTML in a reactive data flow. It differs significantly from frameworks like AngularJS in that it only allows one-way data bindings, greatly simplifying the rendering logic. We have seen several smaller projects achieve success with React.js, and developers are drawn to its clean, composable approach to componentization.

One benefit to the ongoing avalanche of front-end JavaScript frameworks is that occasionally, a new idea crops up that makes us think. React.js is a UI/View framework in which JavaScript functions generate HTML in a reactive data flow. We have seen several smaller projects achieve success with React.js and developers are drawn to its clean, composeable approach to componentization.

One benefit to the ongoing avalanche of front-end JavaScript frameworks is that occasionally, a new idea crops up that makes us think.  React.js is a UI/View framework in which JavaScript functions generate HTML in a reactive data flow.  Although we are wary of mixing code and markup, it results in UI components that are nicely encapsulated and composable.  React.js is getting a lot of developer attention and will benefit from more tools and examples becoming available.