EventSource.constructor

The EventSource() constructor returns a newly-created EventSource, which represents a remote resource.

Syntax

eventSource = new EventSource(url, configuration);

Parameters

url

A USVString that represents the location of the remote resource serving the events/messages.

configuration Optional

Provides options to configure the new connection. The possible entries are:

• withCredentials, defaulting to false, indicating if CORS should be set to include credentials.

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);
}

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also

• EventSource