[1xdevloper]

Probably because they're using a polyfill[0][1] to handle the event stream.

[0] https://stackoverflow.com/questions/55201372/event-stream-da... [1] https://github.com/EventSource/eventsource/issues/94

[black3r]

And that's because the native EventStream API only supports GET requests, so if you want to use a POST request (which make more sense in this context) you have to use a custom implementation...