The EventSource() constructor returns a newly-created EventSource, which represents a remote resource.
EventSource()
Syntax
new EventSource(url, configuration);
Parameters
-
url -
A
USVStringthat represents the location of the remote resource serving the events/messages. -
configurationOptional -
Provides options to configure the new connection. The possible entries are:
-
withCredentials, defaulting tofalse, indicating if CORS should be set toincludecredentials.
-
Examples
var evtSource = new EventSource('sse.php'); var eventList = document.querySelector('ul'); evtSource.onmessage = function(e) { var newElement = document.createElement("li"); newElement.textContent = "message: " + e.data; eventList.appendChild(newElement); }
Note: You can find a full example on GitHub — see Simple SSE demo using PHP.
Specifications
| Specification |
|---|
| HTML Standard # dom-eventsource-dev |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
EventSource |
6
|
79
|
6
|
No
|
11
|
5
|
4.4
|
18
|
45
|
12
|
5
|
1.0
|
cors_support |
26
|
79
|
11
|
No
|
12
|
7
|
≤37
|
26
|
45
|
12
|
7
|
2.0
|
See also
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/EventSource/EventSource
