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 139 min read
The Event System
React doesn't attach your onClick to the button. When you call createRoot(container), it puts one capture and one bubble listener per native event type on the root container. On a…