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---
title: WindowEventHandlers
slug: Web/API/WindowEventHandlers
tags:
- API
- HTML-DOM
- Interface
- Mixin
- Reference
- WindowEventHandlers
translation_of: Web/API/WindowEventHandlers
---
<div>{{APIRef("HTML DOM")}}</div>
<p>The <strong><code>WindowEventHandlers</code></strong> mixin describes the event handlers common to several interfaces like {{domxref("Window")}}, or {{domxref("HTMLBodyElement")}} and {{domxref("HTMLFrameSetElement")}}. Each of these interfaces can implement additional specific event handlers.</p>
<div class="blockIndicator note">
<p><strong>Note</strong>: <code>WindowEventHandlers</code> is a mixin and not an interface; you can't actually create an object of type <code>WindowEventHandlers</code>.</p>
</div>
<h2 id="Properties">Properties</h2>
<p><em>The events properties, of the form <code>onXYZ</code>, are defined on the {{domxref("WindowEventHandlers")}}, and implemented by {{domxref("Window")}}, and {{domxref("WorkerGlobalScope")}} for Web Workers.</em></p>
<dl>
<dt>{{domxref("WindowEventHandlers.onafterprint")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("afterprint")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onbeforeprint")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("beforeprint")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onbeforeunload")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("beforeunload")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onhashchange")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("hashchange")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onlanguagechange")}} {{experimental_inline}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("languagechange")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onmessage")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("message")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onmessageerror")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("MessageError")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onoffline")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("offline")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.ononline")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("online")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onpagehide")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("pagehide")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onpageshow")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("pageshow")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onpopstate")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("popstate")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onstorage")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("storage")}} event is raised.</dd>
<dt>{{domxref("WindowEventHandlers.onunhandledrejection")}} {{experimental_inline}}</dt>
<dd>An event handler for unhandled {{jsxref("Promise")}} rejection events.</dd>
<dt>{{domxref("WindowEventHandlers.onunload")}}</dt>
<dd>Is an {{domxref("EventHandler")}} representing the code to be called when the {{event("unload")}} event is raised.</dd>
</dl>
<h2 id="Methods">Methods</h2>
<p><em>This interface defines no method.</em></p>
<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', '#windoweventhandlers', 'WindowEventHandlers')}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td>No change since the latest snapshot, {{SpecName("HTML5.1")}}.</td>
</tr>
<tr>
<td>{{SpecName('HTML5.1', '#windoweventhandlers', 'WindowEventHandlers')}}</td>
<td>{{Spec2('HTML5.1')}}</td>
<td>Snapshot of {{SpecName("HTML WHATWG")}}. Added <code>onlanguage</code> since the {{SpecName("HTML5 W3C")}} snapshot.</td>
</tr>
<tr>
<td>{{SpecName("HTML5 W3C", "#windoweventhandlers", "WindowEventHandlers")}}</td>
<td>{{Spec2('HTML5 W3C')}}</td>
<td>Snapshot of {{SpecName("HTML WHATWG")}}. Creation of <code>WindowEventHandlers</code> (properties where on the target before it).</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{Compat("api.WindowEventHandlers")}}</p>
<h2 id="See_also">See also</h2>
<ul>
<li>{{domxref("Window")}} and {{domxref("WorkerGlobalScope")}}</li>
</ul>
|
