I always recommend looking at Server-Sent Events [0] and EventSource [1]. It's a standardization of old style long-polling, mapping very well to the HTTP paradi

I always recommend looking at Server-Sent Events [0] and EventSource [1]. It's a standardization of old style long-polling, mapping very well to the HTTP paradigm and is built in to the web standard. It's so much easier to reason about than websockets, and a naive server side implementation is very simple. A caveat is to only use them with HTTP 2 and/or client side logic to only have one connection open to the server, because of browser limits on simultaneous requests to the same origin. [0] https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events https://developer.mozilla.org/en-US/docs/Web/API/Server-sent... [1] https://developer.mozilla.org/en-US/docs/Web/API/EventSource https://developer.mozilla.org/en-US/docs/Web/API/EventSource