I spent some time playing with React Compiler to implement some optimizations. It was amazing how much performance I could gain. Makes me really want to spend more time in the frontend compiler space. So much potential performance left on the table. jimmyhmiller.com/what-does-th...

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I really like the next 16.4 upgrades to Turbopack's Bundle Analyzer, loving that I am able to see initial load JS size, a table of files, and easy comparisons between builds.

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Edge states are where UX bugs hide, yet they're the hardest to reach in E2E tests, and unit tests don't run in real UI. Component testing reaches every UX state in a real UI, fast. That’s why it’s been Storybook’s focus for years. We've put what we know into one full guide 👇

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This PR ducked under the radar, but was just officially released in React 19.3 Being able to render <Context.Provider> from a server component (to serialize rsc data to the client) is a no brainer sugar that makes crossing the boundary in nested situations much cleaner github.com/react/react/...

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understated but both of these are kinda huge. ViewTransition is the first ever (!) first-class animation API in React. (it's powered by the browser API but is composable in a very Reacty way.) and Fragment refs solve "merge refs" soup. you can now have natural apis like <IntersectionObserver> etc

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