SharedWorker()

The SharedWorker() constructor creates a SharedWorker object that executes the script at the specified URL. This script must obey the same-origin policy.

If the URL has an invalid syntax or if the same-origin policy is violated, a DOMException of type SECURITY_ERR is thrown.

Syntax

var myWorker = new SharedWorker("aURL", name);

Arguments

aURL

A DOMString representing the URL of the script the worker will execute. It must obey the same-origin policy.

name

An optional argument that specifies an existing SharedWorkerGlobalScope.name — if this is specified then that SharedWorkerGlobalScope will be used as the scope for this shared worker.

Example

The following code snippet shows creation of a SharedWorker object using the SharedWorker() constructor and subsequent usage of the object:

var myWorker = new SharedWorker("worker.js");

myWorker.port.start();

first.onchange = function() {
  myWorker.port.postMessage([first.value,second.value]);
  console.log('Message posted to worker');
}

second.onchange = function() {
  myWorker.port.postMessage([first.value,second.value]);
  console.log('Message posted to worker');
}

myWorker.port.onmessage = function(e) {
  result1.textContent = e.data;
  console.log('Message received from worker');
}

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

Specifications

Browser compatibility

See also

• The SharedWorker interface it belongs to.