React 19 新功能全解析：Actions、全新 use API 與簡化 ref 傳遞
Original: What’s new in React 19
The official release of React 19 has brought milestone changes to frontend development, particularly in asynchronous data handling…
React 19 帶來了多項令人興奮的變革。首先是「Actions」機制，大幅簡化了表單提交與非同步資料處理，並搭配 useActionState 等新 Hook。其次，全新的 use API 允許在渲染時直接讀取 Promise 和 Context。最後，開發者期盼已久的 ref 終於可以直接作為 prop 傳遞，不再需要 forwardRef，顯著提升了開發體驗。
The official release of React 19 has brought milestone changes to frontend development, particularly in asynchronous data handling, component API simplification, and integration with server-side rendering (SSR). Vercel, as an important driving force in the React ecosystem, has provided a detailed analysis of the core highlights of this upgrade.
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