Event Delegation

Event Delegation and Event Bus Quiz

Practice DOM event delegation, build a minimal pub/sub event bus, and roll your own dispatcher so cross-component communication stays decoupled.

React Synthetic Events and Event Pooling Quiz

Three drills on React's SyntheticEvent wrapper, how delegation works, and the difference between the React 16 pooling era and React 17+ behavior.

JavaScript Cross-Browser Event Target: Two Approaches Quiz

Two seeded approaches to read the event target across browsers (event.target plus legacy event.srcElement, and a delegated table cell editor), plus two companions on currentTarget and composedPath.