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.
Concepts and usage
To learn how to use server-sent events, see our article Using server-sent events.
Interfaces
EventSource- Defines all the features that handle connecting to a server, receiving events/data, errors, closing a connection, etc.
Examples
Specification
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'Server-sent events' in that specification. |
Living Standard |
See also
Tools
- EventSource polyfill for Node.js
- Remy Sharp’s EventSource polyfill
- Yaffle’s EventSource polyfill
- Rick Waldron’s jquery plugin
- intercooler.js declarative SSE support
Related Topics
Other resources
- A Twitter like application powered by server-sent events and its code on Github.
- HTML5 and Server-sent events
- Server-sent events using Asp.Net