Server-sent events

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.

Interfaces

EventSource

Tools

See also

Specification

Specification Status Comment
Server-Sent Events Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
EventSource support 6 6.0 (6.0) [1] ? 9 [2] 5
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
EventSource support 4.4 45 ? 12 4.1

[1] Firefox currently does not support EventSource in web/shared workers. and prior to version 36 server-sent events do not reconnect automatically in case of a connection interrupt.

[2] Opera 9 partial supports Server-sent Events.

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/server-sent_events

Server-sent events