Using Fetch Event Source for server-sent events in React

Server-sent events (SSE) facilitate real-time data communication in web applications by sending one-directional updates from the server to the client via HTTP, crucial for dynamic content like live scores or stock prices. Traditional methods like the EventSource API, while part of the HTML WC3 specification, have limitations in customization and error handling. The Fetch Event Source, developed by Microsoft, enhances control by allowing custom request methods, headers, and body content, along with the ability to manage errors and retry strategies effectively. It also integrates with the Page Visibility API to optimize server load by suspending updates when the browser is not visible. The tutorial provides a practical implementation example using React and Node.js, demonstrating how to set up a full-stack application to simulate real-time stock price updates. Through Fetch Event Source, developers gain better control over real-time data handling, enabling robust and efficient application design.