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EventTarget - CustomEvent | components communication in React - part Three
- EventTarget is the foundation of the browser's event system, enabling objects to handle events through methods like addEventListener and dispatchEvent.
- Attaching event handlers to DOM elements involves subscribing to the element through event channels, with the element as the publisher and the callback function as the subscriber.
- The CustomEvent constructor allows defining custom event types and passing data using the detail property, expanding event handling capabilities.
- The browser's event system combines attributes of the Observer and Pub-Sub patterns, with DOM events being tightly coupled and custom events being decoupled.
- Implementing a custom event system in React with EventTarget involves defining event types, creating an EventTarget instance, and using functions like emit and dispatchEvent.
- The emit function publishes events by creating a CustomEvent and dispatching it using the EventTarget instance, while the subscribe function listens for specific events.
- Listeners subscribed through the subscribe function provide callback functions to handle the emitted events, enhancing component communication in React.
- The event handling setup in React mirrors aspects of the Pub-Sub pattern, offering a structured and type-safe approach to managing component interactions.
- Understanding the browser's event system and implementing custom events in React enhance the flexibility and scalability of handling component communication.
- The CustomEvent API in conjunction with EventTarget offers a powerful mechanism for defining, emitting, and handling custom events in web applications.
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