React Internals · Part 2119 min read
Walkthrough: setState to Pixels
A click reaches React through the listener createRoot put on the container. dispatchDiscreteEvent sets the update priority to Discrete, so setCount gets SyncLane. The update is…
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- React Internals · Part 2018 min read
Walkthrough: First Render End to End
createRoot(el).render(<App/>) renders nothing synchronously. It builds the root objects, attaches the event listeners, queues one DefaultLane update and books a microtask. The…