The connect event is fired in shared workers at their SharedWorkerGlobalScope when a new client connects.
| Bubbles | No |
| Cancelable | No |
| Interface | MessageEvent
|
| Event handler property | SharedWorkerGlobalScope.onconnect
|
Examples
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 event object is a MessageEvent.
The connecting port can be referenced through the event object'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.
self.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 ([[../../../../../../../mdn.github.io/simple-shared-worker/index|run shared worker]].)
addEventListener equivalent
You could also set up an event handler using the addEventListener() method:
self.addEventListener('connect', function(e) {
var port = e.ports[0];
port.onmessage = function(e) {
var workerResult = 'Result: ' + (e.data[0] * e.data[1]);
port.postMessage(workerResult);
}
});Specifications
| Specification | Status |
|---|---|
| HTML Living StandardThe definition of 'connect event' in that specification. | Living Standard |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
See also
SharedWorkerGlobalScope: connect event by Mozilla Contributors is licensed under CC-BY-SA 2.5.
