The article explains how to build real-time web apps with Flask using Server-Sent Events, which push updates over HTTP without polling. It highlights Flask’s lightweight, flexible nature and walks through a minimal SSE endpoint at /stream using text/event-stream, testable via curl—ideal for live dashboards, instant messaging, and seamless user experiences.
Server-Sent Events (SSE) let servers push real-time, one‑way updates over HTTP to browsers via text/event-stream, delivering low‑latency, scalable, and simple alternatives to polling or WebSockets for live dashboards, chats, scores, IoT, and collaboration. The article explains the flow (connect, stream, handle), best practices (robust format, efficient generation, graceful retries), and a project‑management example showing instant, synchronized UI changes.
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