I too was interested by this. If you follow the links it's all documented: https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events https://develope

I too was interested by this. If you follow the links it's all documented: https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events https://developer.mozilla.org/en-US/docs/Web/API/Server-sent... https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events https://developer.mozilla.org/en-US/docs/Web/API/Server-sent... > Traditionally, a web page has to send a request to the server to receive new data; that is, the page requests data from the server. With server-sent events, it's possible for a server to send new data to a web page at any time, by pushing messages to the web page. These incoming messages can be treated as Events + data inside the web page. Push-based server->client messaging. Exciting stuff.