React has always been the library of choice for developing dynamic and high-performance web... Tagged with react, react19, programming, beginners.

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React 19 introduces significant enhancements including Actions for streamlined asynchronous operations, new hooks like useOptimistic, useActionState, and useFormStatus for better state management, improved hydration for faster server-side rendering, an optimized Context API for better performance, and support for custom elements to integrate web components seamlessly. These updates aim to reduce complexity and boost the performance, ultimately providing a superior developer experience.

React 19: The Features You Need to Know!

Actions: Streamlining Asynchronous Operations

Improved Hydration: Boosting Server-Side Rendering

Enhanced Context API: Optimizing Performance

Support for Custom Elements: Integrating Web Components

For me this is the biggest update so far. They are literally pointing out:
“we’re going to be a fullstack framework”
I’m still not sure if that’s a good thing or not. It definitely is for smaller projects.

It’s interesting to me that they decided to use an array for useActionState.
Many codebases are using tanstack/react-query to handle this problem already, which uses an object that is returned. It’s a much better API than what is show here. In my opinion, adoption will be slower for older codebases due to that.