SharedWorkerGlobalScope.onconnect

The onconnect property of the SharedWorkerGlobalScope interface is an EventHandler representing the code to be called when the connect event is raised — that is, when a MessagePort connection is opened between the associated SharedWorker and the main thread.

Syntax

onconnect = function() { ... };

Example

This example shows a shared worker file — when a connection to the worker occurs from a main thread via a MessagePort, the onconnect event handler fires. The connecting port can be referenced through the event's ports parameter; this reference can have an onmessage handler attached to it to handle messages coming in through the port, and its postMessage() method can be used to send messages back to the main thread using the worker.

onconnect = function(e) {
    var port = e.ports[0];

    port.onmessage = function(e) {
      var workerResult = 'Result: ' + (e.data[0] * e.data[1]);
      port.postMessage(workerResult);
    }

    port.start();
}

For a complete running example, see our Basic shared worker example (run shared worker.)

Specifications

Specification Status Comment
WHATWG HTML Living Standard
The definition of 'onconnect' in that specification.
Living Standard  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Support 3 29.0 (29.0) No support 10.60 No support
Feature Android Chrome for Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Mobile Opera Mobile Safari Mobile
Support --- No support 29.0 (29.0) 1.4 --- --- ---

See also

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills, kscarfone
 Last updated by: fscholz,