Server-Sent Events (EventSource)
Enables push notifications from the server received as DOM events.
René Mercure commented
Many shared servers do not allow use of websocket, but do work perfectly with SSE.
whatwg should reconsider the "legacy" status of that feature and Edge should speed up the development of this feature as they'll lose support from many websites.
Mauro Pereira Junior commented
Currently, if you open our application in Edge it will show the following message:
"THIS APP IS ONLY SUPPORTED BY CHROME, FIREFOX AND SAFARI"
This happens only because of the lack of SSE feature in the Edge Browser.
Lars Kemmann commented
It may be "legacy" but it's a proven piece of web infrastructure that makes very efficient use of existing technologies. I greatly prefer the simplicity of SSE over something like Web Sockets -- a heavyweight bolt-on that certainly has its place but, as mentioned by others, comes with a lot of overhead and risk: firewalls, complexity, etc.
Sergey Chico commented
Seems like SSE is considered as legacy by whatwg team
Ryan Hanthorn commented
Edge has unfortunately lagged behind every other browser in terms of implementing standard features. I'm a big fan of standards and I'm not going to spend a huge number of dev hours compensating for a lack of standard features every other browser supports but one. So officially, I don't support Edge. But, I would like to.
This feature in particular is necessary to easily develop real time sites. I'd very much like to see it implemented as soon as possible.
Fábio Alves commented
I need this amazing feature. It made my development richer in Chrome but sadder in Edge.
please, only remove Safari from your list of "modern" browsers, because it supports even less standards than Edge, it's on the level of IE11 that already outdated and is not being developed
Whichever feature I check on caniuse.com and test - there is a big chance that it doesn't work in Safari
SSE has been supported by most browsers for 6 years already, can't believe a highly requested feature of a simple Web Standard takes so long for Microsoft to implement. Inability like this makes me wish Edge never existed and Microsoft just stopped making web browsers altogether.
The Internet would be a more modernized and much better off if IE/Edge no longer exist and we only needed to support Chrome, Safari, Firefox and Opera.
Cameron Steffen commented
Well this is sad. I honestly thought Microsoft turned a new leaf with Edge.
Chaiyot Kotchapan commented
We are planning to switch all clients and future product development to Chrome because there is no SSE support on Microsoft browsers.
SSE is very useful (and simpler than WebSockets) for broadcasting updates to clients. Would be very helpful to have it supported in Edge.
Ashwin Kamath commented
Edge is the only browser not to support SSE. Please do add it.
Ian Jeffray commented
I was shocked to find this WASN'T supported by Edge. Please do add it - soon!
Tobi Reif commented
Please add support, edge is the only browser left.
Алексей Мичник commented
Why, why so many useful things are still under consideration? Hire more programmers, why wouldnt you, it might help to make Edge really modern and not to repeat fate of IE
Why does it take so long to consider this feature as something valuable?
3500+ votes aren't enough? Is there any blocking point somewhere?
The polyfills aren't a viable solution. Please, implement this ASAP.
සුපුන් පෙරේරා Supun Perera commented
Agree with James.
We are compelled to mention the non-compatibility with edge/IE and the users (and devs) move to Chrome/FF
James Hancock commented
This is required for HMR which is becoming a requirement for developers. By not having it you're driving devs to chrome which isn't a good thing.
I wonder why it is still under consideration. Are you creating browser or tool to download and install browser?