Server Sent Events - An alternative to AJAX and WebSockets 

Really interesting. I had never heard of SSE

Good explanation. It deserves more views.

Great overview, thanks :)

Subscribed. Great job man

Thanks! 👍

great❤

Hey, where is your "BUY ME WHISKEY" link?

Нужно переменную globalVersion указать как 1, а localVersion = 0. Тогда при первоначальной инициализации будет отрисовка данных подписчиков. Если открыть новую вкладку при уже изменённых данных они будут перерисованы.

Very interesting content, thank you for this example.

u said server connection will remain open forever is their any way to close it after user exits tab or component from the client side?

The problem is most hosts do not allow them. If you try to implement one in some way a lot of times they will kick you off because they are resource intensive. getting a host that will support them is expensive.

This is awesome, please can you share the github link?

Thank you - but what is the benefit compared with web sockets, because you still have an open connection, but you've limited it.

Спасибо огромное! Ты крутой!

Hey, nice explaination... I had a question. What if I want to send/broadcast events/messages to say 10s of millions of clients/subscribers. How can we scale server sent events to achieve that?

@ 42:59 where you introduce and compare localVersion with GlobalVersion, how can I have the same logic if am using SSE like below; const sendEventDashboard = async (req, res) => { try { const orders = await Order.find({ agent_id: req.params.id }) .populate("agent_id") .sort({ _id: -1 }); res.writeHead(200, { "Cache-Control": "no-cache", "Content-Type": "text/event-stream", Connection: "keep-alive", }); const sseId = new Date().toDateString(); const intervalId = setInterval(() => { writeEvent(res, sseId, JSON.stringify(orders)); }, SEND_INTERVAL); res.on("close", () => { clearInterval(intervalId); res.end(); // console.log("Client closed connection browser"); }); } catch (error) { console.log(error); } }; export const getOrdersStreamDashboard = async (req, res) => { if (req.headers.accept === "text/event-stream") { sendEventDashboard(req, res); } else { res.json({ message: "Okay" }); } };

you could have used res.sendFile(absolutePath) instead of using the file module.

Thank you, I really appreciate your explanation. Where can I find the source code?

how to send a message to a few targeted users only?

you're lying... you had 3 chrome browsers open 😂😂 Great video though 👍