The SSE spec contains the `retry` and `Last-Event-ID` mechanism. Of course if you are making your own implementation, nothing is provided, but I'm saying that t

The SSE spec contains the `retry` and `Last-Event-ID` mechanism. Of course if you are making your own implementation, nothing is provided, but I'm saying that the spec has such mechanisms built-in. https://html.spec.whatwg.org/multipage/server-sent-events.html#reestablish-the-connection https://html.spec.whatwg.org/multipage/server-sent-events.ht...