Build a streaming UI without overcomplicating it

The article explains that Server-Sent Events (SSE) offer a simpler, browser-native alternative to WebSockets for building UIs that require live updates, progress indicators, or log streaming. Unlike polling, which generates unnecessary traffic, SSE allows the server to push one-way data streams to the client over standard HTTP using the EventSource API. The article provides a straightforward implementation example using an ASP.NET backend and an Angular frontend.

If you are building a UI that needs to show progress, logs, or live updates, you do not need to jump straight to WebSockets. In many cases, SSE is the simpler and more appropriate choice.It is a browser-friendly way for the server to push events to the client over HTTP. Think of it as a one-way live stream: the server sends updates, and the browser listens. SSE is a great option when you need server → client streaming and want to keep the implementation simple. SSE stands for Server-Sent Events. It is a browser-native way for the server to push updates to the client over HTTP. Polling means the browser repeatedly asks the server for new data.That creates extra traffic and awkward timing. The backend exposes a stream of chunks and the frontend listens with EventSource . The flow is straightforward: This is especially useful for progress UIs, logs, and status updates. Full code is available here: An ASP.NET endpoint sends streaming chunks as SSE. An Angular service creates an EventSource and exposes the stream to a component.