JavaScript Server-sent events Binding event listeners to EventSource
Example
You can bind event listeners to the EventSource object to listen to different events channels using the .addEventListener method.
EventSource.addEventListener(name: String, callback: Function, [options])
name: The name related to the name of the channel the server is emitting events to.
callback: The callback function runs every time an event bound to the channel is emitted, the function provides the event as an argument.
options: Options that characterize the behavior of the event listener.
The following example shows a heartbeat event stream from the server, the server sends events on the heartbeat channel and this routine will always run when an event in accepted.
var eventSource = new EventSource("api/heartbeat");
...
eventSource.addEventListener("heartbeat", function(event) {
var status = event.data;
if (status=='OK') {
// do something
}
});
