Event
In React, an event is a triggered response to specific actions like user interactions such as mouse clicks, key presses, or browser actions like loading a page. React creates its own event system which is fully compatible with the W3C object model. This system wraps the native event, giving you a cross-browser interface with the same properties across different browsers. Events are named using camelCase, and the event handlers are passed instances of SyntheticEvent, React’s cross-browser wrapper around the browser’s native event.