Simpler Than WebSocket? Server-Sent Events Explained
Lightweight SSE beats WebSocket for one-way live feeds—copy-paste Flask demo in 5 min.
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Have you ever encountered these scenarios: wanting to create a real-time stock price dashboard, an online auction page, or a background task progress indicator, but struggling with how to automatically fetch the latest data without requiring users to manually refresh? Polling? Too inefficient. WebSocket? A bit like using a sledgehammer to crack a nut.
Today, I want to introduce you to an underrated HTML5 powerhouse—Server-Sent Events—which allows you to implement efficient, unidirectional real-time communication from server to client with incredibly simple code.
Server-Sent Events is a web technology that allows servers to proactively push data to clients (typically browsers). Its core features include:
