---
title: SharedWorkerGlobalScope
slug: Web/API/SharedWorkerGlobalScope
tags:
  - API
  - Interface
  - NeedsTranslation
  - Reference
  - SharedWorkerGlobalScope
  - TopicStub
  - Web Workers
translation_of: Web/API/SharedWorkerGlobalScope
---
<div>{{APIRef("Web Workers API")}}</div>

<p>The <strong><code>SharedWorkerGlobalScope</code></strong> object (the {{domxref("SharedWorker")}} global scope) is accessible through the {{domxref("window.self","self")}} keyword. Some additional global functions, namespaces objects, and constructors, not typically associated with the worker global scope, but available on it, are listed in the <a href="/en-US/docs/Web/JavaScript/Reference">JavaScript Reference</a>. See the complete list of <a href="/en-US/docs/Web/API/Web_Workers_API/Functions_and_classes_available_to_workers">functions available to workers</a>.</p>

<h2 id="Properties">Properties</h2>

<p><em>This interface inherits properties from the {{domxref("WorkerGlobalScope")}} interface, and its parent {{domxref("EventTarget")}}, and therefore implements properties from {{domxref("WindowTimers")}}, {{domxref("WindowBase64")}}, and {{domxref("WindowEventHandlers")}}.</em></p>

<dl>
 <dt>{{domxref("SharedWorkerGlobalScope.name")}} {{readOnlyinline}}</dt>
 <dd>The name that the {{domxref("SharedWorker")}} was (optionally) given when it was created using the {{domxref("SharedWorker.SharedWorker", "SharedWorker()")}} constructor. This is mainly useful for debugging purposes.</dd>
 <dt>{{domxref("SharedWorkerGlobalScope.applicationCache")}} {{readOnlyinline}} {{deprecated_inline}}</dt>
 <dd>This property returns the {{domxref("ApplicationCache")}} object for the worker (see <a href="/en-US/docs/Web/HTML/Using_the_application_cache">Using the application cache</a>).</dd>
</dl>

<h3 id="Properties_inherited_from_WorkerGlobalScope">Properties inherited from WorkerGlobalScope</h3>

<dl>
 <dt>{{domxref("WorkerGlobalScope.self")}}</dt>
 <dd>Returns an object reference to the <code>DedicatedWorkerGlobalScope</code> object itself.</dd>
 <dt>{{domxref("WorkerGlobalScope.console")}} {{readOnlyinline}}</dt>
 <dd>Returns the {{domxref("Console")}} associated with the worker.</dd>
 <dt>{{domxref("WorkerGlobalScope.location")}} {{readOnlyinline}}</dt>
 <dd>Returns the {{domxref("WorkerLocation")}} associated with the worker. <code>WorkerLocation</code> is a specific location object, mostly a subset of the {{domxref("Location")}} for browsing scopes, but adapted to workers.</dd>
 <dt>{{domxref("WorkerGlobalScope.navigator")}} {{readOnlyinline}}</dt>
 <dd>Returns the {{domxref("WorkerNavigator")}} associated with the worker. <code>WorkerNavigator</code> is a specific navigator object, mostly a subset of the {{domxref("Navigator")}} for browsing scopes, but adapted to workers.</dd>
 <dt>{{domxref("WorkerGlobalScope.performance")}} {{readOnlyinline}} {{Non-standard_inline}}</dt>
 <dd>Returns the {{domxref("Performance")}} object associated with the worker, which is a regular performance object, but with a subset of its properties and methods available.</dd>
</dl>

<h3 id="Event_handlers">Event handlers</h3>

<p><em>This interface inherits event handlers from the {{domxref("WorkerGlobalScope")}} interface, and its parent {{domxref("EventTarget")}}, and therefore implements event handlers from {{domxref("WindowTimers")}}, {{domxref("WindowBase64")}}, and {{domxref("WindowEventHandlers")}}.</em></p>

<dl>
 <dt>{{domxref("SharedWorkerGlobalScope.onconnect")}}</dt>
 <dd>Is an {{event("Event_handlers", "event handler")}} representing the code to be called when the {{event("connect")}} event is raised — that is, when a {{domxref("MessagePort")}} connection is opened between the associated {{domxref("SharedWorker")}} and the main thread.</dd>
</dl>

<h2 id="Methods">Methods</h2>

<p><em>This interface inherits methods from the {{domxref("WorkerGlobalScope")}} interface, and its parent {{domxref("EventTarget")}}, and therefore implements methods from {{domxref("WindowTimers")}}, {{domxref("WindowBase64")}}, and {{domxref("WindowEventHandlers")}}.</em></p>

<dl>
 <dt>{{domxref("SharedWorkerGlobalScope.close()")}}</dt>
 <dd>Discards any tasks queued in the <code>SharedWorkerGlobalScope</code>'s event loop, effectively closing this particular scope.</dd>
</dl>

<h3 id="Inherited_from_WorkerGlobalScope">Inherited from WorkerGlobalScope</h3>

<dl>
 <dt>{{domxref("WorkerGlobalScope.close()")}} {{deprecated_inline}}</dt>
 <dd>Discards any tasks queued in the <code>WorkerGlobalScope</code>'s event loop, effectively closing this particular scope.</dd>
 <dt>{{domxref("WorkerGlobalScope.dump()")}} {{non-standard_inline}}</dt>
 <dd>Allows you to write a message to stdout — i.e. in your terminal. This is the same as Firefox's {{domxref("window.dump")}}, but for workers.</dd>
 <dt>{{domxref("WorkerGlobalScope.importScripts()")}}</dt>
 <dd>Imports one or more scripts into the worker's scope. You can specify as many as you'd like, separated by commas. For example:<code> importScripts('foo.js', 'bar.js');</code></dd>
</dl>

<h3 id="Implemented_from_other_places">Implemented from other places</h3>

<dl>
 <dt>{{domxref("WindowBase64.atob()")}}</dt>
 <dd>Decodes a string of data which has been encoded using base-64 encoding.</dd>
 <dt>{{domxref("WindowBase64.btoa()")}}</dt>
 <dd>Creates a base-64 encoded ASCII string from a string of binary data.</dd>
 <dt>{{domxref("WindowTimers.clearInterval()")}}</dt>
 <dd>Cancels the repeated execution set using {{domxref("WindowTimers.setInterval()")}}.</dd>
 <dt>{{domxref("WindowTimers.clearTimeout()")}}</dt>
 <dd>Cancels the repeated execution set using {{domxref("WindowTimers.setTimeout()")}}.</dd>
 <dt>{{domxref("WindowTimers.setInterval()")}}</dt>
 <dd>Schedules the execution of a function every X milliseconds.</dd>
 <dt>{{domxref("WindowTimers.setTimeout()")}}</dt>
 <dd>Sets a delay for executing a function.</dd>
</dl>

<h2 id="Events">Events</h2>

<p>Listen to this event using <code><a href="/en-US/docs/Web/API/EventTarget/addEventListener">addEventListener()</a></code> or by assigning an event listener to the <code>on<em>eventname</em></code> property of this interface.</p>

<dl>
 <dt><code><a href="/en-US/docs/Web/API/SharedWorkerGlobalScope/connect_event">connect</a></code></dt>
 <dd>Fired on shared workers when a new client connects.<br>
 Also available via the <code><a href="/en-US/docs/Web/API/SharedWorkerGlobalScope/onconnect">onconnect</a></code> property.</dd>
</dl>

<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{SpecName('HTML WHATWG', '#sharedworkerglobalscope', 'SharedWorkerGlobalScope')}}</td>
   <td>{{Spec2('HTML WHATWG')}}</td>
   <td></td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>



<p>{{Compat("api.SharedWorkerGlobalScope")}}</p>

<h2 id="See_also">See also</h2>

<ul>
 <li>{{domxref("SharedWorker")}}</li>
 <li>{{domxref("WorkerGlobalScope")}}</li>
 <li><a href="/en-US/docs/Web/API/Web_Workers_API/Using_web_workers">Using Web workers</a></li>
 <li><a href="/en-US/docs/Web/Guide/Needs_categorization/Functions_available_to_workers">Functions available to workers</a></li>
</ul>