---
title: Window
slug: Web/API/Window
translation_of: Web/API/Window
---
<p>{{APIRef}}</p>

<p><span class="seoSummary"><code>window</code> 物件代表了一個包含 DOM 文件的視窗，其中的 <code>document</code> 屬性指向了視窗中載入的 {{domxref("Document")}} 物件。而使用 <code>document</code> 的</span> {{Domxref("Document.defaultView", "defaultView")}} 屬性，則可取得該 Document 物件所在的視窗 <code>window</code> 物件。</p>

<p>本節提供了 DOM <code>window</code> 物件的所有方法、屬性以及事件的說明。<code>window</code> 物件實作了 <code>Window</code> 介面，而 <code>Window</code> 介面則繼承自 <code><a href="http://www.w3.org/TR/DOM-Level-2-Views/views.html#Views-AbstractView">AbstractView</a></code> 介面。一些額外、與 <code>window</code> 物件沒有直接關係，但卻置於 <code>window</code> 物件中的全域函式、命名空間、物件、介面以及建構式，將會在 <a href="/zh-TW/docs/JavaScript/Reference">JavaScript 參考文件</a>和<a href="/zh-TW/docs/Web/API/Document_Object_Model">文件物件模型（DOM）</a>中說明。</p>

<p>在支援分頁的瀏覽器中（如 Firefox），每一個分頁標籤都擁有自己的 <code>window</code> 物件（如果你正在撰寫瀏覽器附加元件，瀏覽器視窗本身也是一個個別的 window－請參閱 <a href="/zh-TW/docs/Working_with_windows_in_chrome_code#Content_windows">Working with windows in chrome code</a>），分頁不會於同一個瀏覽器視窗中共享 <code>window</code> 物件。但有部分的方法，如 {{Domxref("window.resizeTo()")}} 或 {{Domxref("window.resizeBy()")}} 會套用至整個視窗，而不只是該 <code>window</code> 物件所屬的分頁標籤。一般來說，若無法適當的應用於分頁，便會套用至瀏覽器視窗。</p>

<p>{{InheritanceDiagram}}</p>

<h2 id="屬性">屬性</h2>

<p><em>This interface inherits properties from the {{domxref("EventTarget")}} interface and implements properties from the {{domxref("WindowOrWorkerGlobalScope")}} and {{domxref("WindowEventHandlers")}} mixins.</em></p>

<p>請注意，指向物件的屬性（例如覆蓋了內建物件原型的元素）會在另外的列表中說明。</p>

<dl>
 <dt>{{domxref("Window.applicationCache")}} {{readOnlyInline}} {{gecko_minversion_inline("1.9")}}</dt>
 <dd>指向 {{domxref("OfflineResourceList")}} 物件，此物件提供了視窗的離線資源。</dd>
 <dt>{{domxref("Window.closed")}} {{Non-standard_inline}}{{readOnlyInline}}</dt>
 <dd>This property indicates whether the current window is closed or not.</dd>
 <dt>{{domxref("Window.Components")}} {{Non-standard_inline}}</dt>
 <dd>The entry point to many <a href="/zh-TW/docs/XPCOM">XPCOM</a> features. Some properties, e.g. <a href="/zh-TW/docs/Components.classes">classes</a>, are only available to sufficiently privileged code. <strong>Web code should not use this property.</strong></dd>
 <dt>{{domxref("Window.console")}} {{ReadOnlyInline}}</dt>
 <dd>Returns a reference to the console object which provides access to the browser's debugging console.</dd>
 <dt>{{domxref("Window.content")}} and Window._content {{Non-standard_inline}} {{obsolete_inline}}{{ReadOnlyInline}}</dt>
 <dd>Returns a reference to the content element in the current window. The obsolete variant with underscore is no longer available from Web content.</dd>
 <dt>{{domxref("Window.controllers")}}{{non-standard_inline}}{{ReadOnlyInline}}</dt>
 <dd>Returns the XUL controller objects for the current chrome window.</dd>
 <dt>{{domxref("Window.crypto")}} {{readOnlyInline}}</dt>
 <dd>Returns the browser crypto object.</dd>
 <dt>{{domxref("Window.defaultStatus")}} {{Obsolete_inline("gecko23")}}</dt>
 <dd>Gets/sets the status bar text for the given window.</dd>
 <dt>{{domxref("Window.devicePixelRatio")}} {{non-standard_inline}}{{ReadOnlyInline}}</dt>
 <dd>Returns the ratio between physical pixels and device independent pixels in the current display.</dd>
 <dt>{{domxref("Window.dialogArguments")}} {{ReadOnlyInline}}</dt>
 <dd>Gets the arguments passed to the window (if it's a dialog box) at the time {{domxref("window.showModalDialog()")}} was called. This is an {{Interface("nsIArray")}}.</dd>
 <dt>{{domxref("Window.directories")}} {{obsolete_inline}}</dt>
 <dd>Synonym of {{domxref("window.personalbar")}}</dd>
 <dt>{{domxref("Window.document")}} {{ReadOnlyInline}}</dt>
 <dd>指向此 <code>window</code> 中的 <code>document</code> 物件。</dd>
 <dt>{{domxref("Window.frameElement")}} {{readOnlyInline}}</dt>
 <dd>Returns the element in which the window is embedded, or null if the window is not embedded.</dd>
 <dt>{{domxref("Window.frames")}} {{readOnlyInline}}</dt>
 <dd>Returns an array of the subframes in the current window.</dd>
 <dt>{{domxref("Window.fullScreen")}} {{gecko_minversion_inline("1.9")}}</dt>
 <dd>此屬性表示目前視窗是否為全螢幕顯示。</dd>
 <dt>{{domxref("Window.globalStorage")}} {{gecko_minversion_inline("1.8.1")}} {{Non-standard_inline}} {{Obsolete_inline("gecko13")}}</dt>
 <dd>Unsupported since Gecko 13 (Firefox 13). Use {{domxref("Window.localStorage")}} instead.<br>
 Was: Multiple storage objects that are used for storing data across multiple pages.</dd>
 <dt>{{domxref("Window.history")}} {{ReadOnlyInline}}</dt>
 <dd>指向 history 物件。</dd>
 <dt>{{domxref("Window.innerHeight")}} {{readOnlyInline}}</dt>
 <dd>取得視窗內的網頁內容高度，包含水平捲軸。</dd>
 <dt>{{domxref("Window.innerWidth")}} {{readOnlyInline}}</dt>
 <dd>取得視窗內的網頁內容寬度，包含垂直捲軸。</dd>
 <dt>{{domxref("Window.isSecureContext")}} {{readOnlyInline}}</dt>
 <dd>Indicates whether a context is capable of using features that require secure contexts.</dd>
 <dt>{{domxref("Window.length")}} {{readOnlyInline}}</dt>
 <dd>Returns the number of frames in the window. See also {{domxref("window.frames")}}.</dd>
 <dt>{{domxref("Window.location")}}</dt>
 <dd>Gets/sets the location, or current URL, of the window object.</dd>
 <dt>{{domxref("Window.locationbar")}} {{ReadOnlyInline}}</dt>
 <dd>Returns the locationbar object, whose visibility can be toggled in the window.</dd>
 <dt>{{domxref("Window.localStorage")}} {{readOnlyInline}}{{gecko_minversion_inline("1.9.1")}}</dt>
 <dd>Returns a reference to the local storage object used to store data that may only be accessed by the origin that created it.</dd>
 <dt>{{domxref("Window.menubar")}} {{ReadOnlyInline}}</dt>
 <dd>Returns the menubar object, whose visibility can be toggled in the window.</dd>
 <dt>{{domxref("Window.messageManager")}} {{gecko_minversion_inline("2.0")}}</dt>
 <dd>Returns the <a href="/zh-TW/docs/The_message_manager">message manager</a> object for this window.</dd>
 <dt>{{domxref("Window.mozAnimationStartTime")}} {{ReadOnlyInline}}{{gecko_minversion_inline("2.0")}} {{Deprecated_inline}}</dt>
 <dd>The time in milliseconds since epoch at which the current animation cycle began.</dd>
 <dt>{{domxref("Window.mozInnerScreenX")}} {{ReadOnlyInline}}{{non-standard_inline}}{{gecko_minversion_inline("1.9.2")}}</dt>
 <dd>Returns the horizontal (X) coordinate of the top-left corner of the window's viewport, in screen coordinates. This value is reported in CSS pixels. See <code>mozScreenPixelsPerCSSPixel</code> in {{interface("nsIDOMWindowUtils")}} for a conversion factor to adapt to screen pixels if needed.</dd>
 <dt>{{domxref("Window.mozInnerScreenY")}} {{ReadOnlyInline}} {{non-standard_inline}}{{gecko_minversion_inline("1.9.2")}}</dt>
 <dd>Returns the vertical (Y) coordinate of the top-left corner of the window's viewport, in screen coordinates. This value is reported in CSS pixels. See <code>mozScreenPixelsPerCSSPixel</code> for a conversion factor to adapt to screen pixels if needed.</dd>
 <dt>{{domxref("Window.mozPaintCount")}} {{non-standard_inline}}{{ReadOnlyInline}} {{gecko_minversion_inline("2.0")}}</dt>
 <dd>Returns the number of times the current document has been rendered to the screen in this window. This can be used to compute rendering performance.</dd>
 <dt>{{domxref("Window.name")}}</dt>
 <dd>Gets/sets the name of the window.</dd>
 <dt>{{domxref("Window.navigator")}} {{readOnlyInline}}</dt>
 <dd>Returns a reference to the navigator object.</dd>
 <dt>{{domxref("Window.opener")}}</dt>
 <dd>Returns a reference to the window that opened this current window.</dd>
 <dt>{{domxref("Window.orientation")}}{{non-standard_inline}}{{deprecated_inline}}{{readOnlyInline}}</dt>
 <dd>Returns the orientation in degrees (in 90 degree increments) of the viewport relative to the device's natural orientation.</dd>
 <dt>{{domxref("Window.outerHeight")}} {{readOnlyInline}}</dt>
 <dd>取得瀏覽器視窗的高度。</dd>
 <dt>{{domxref("Window.outerWidth")}} {{readOnlyInline}}</dt>
 <dd>取得瀏覽器視窗的寬度。</dd>
 <dt>{{domxref("Window.scrollX","Window.pageXOffset")}} {{readOnlyInline}}</dt>
 <dd>An alias for {{domxref("window.scrollX")}}.</dd>
 <dt>{{domxref("Window.scrollY","Window.pageYOffset")}}{{readOnlyInline}}</dt>
 <dd>An alias for {{domxref("window.scrollY")}}</dd>
 <dt>{{domxref("Window.sessionStorage")}} {{readOnlyInline}}</dt>
 <dd>Returns a reference to the session storage object used to store data that may only be accessed by the origin that created it.</dd>
 <dt>{{domxref("Window.parent")}} {{readOnlyInline}}</dt>
 <dd>Returns a reference to the parent of the current window or subframe.</dd>
 <dt>{{domxref("Window.performance")}} {{readOnlyInline}}</dt>
 <dd>Returns a {{domxref("Performance")}} object, which includes the {{domxref("Performance.timing", "timing")}} and {{domxref("Performance.navigation", "navigation")}} attributes, each of which is an object providing <a href="/zh-TW/docs/Navigation_timing">performance-related</a> data. See also <a href="/zh-TW/docs/Web/API/Navigation_timing_API/Using_Navigation_Timing">Using Navigation Timing</a> for additional information and examples.</dd>
 <dt>{{domxref("Window.personalbar")}} {{readOnlyInline}}</dt>
 <dd>Returns the personalbar object, whose visibility can be toggled in the window.</dd>
 <dt>{{domxref("Window.pkcs11")}} {{obsolete_inline(29)}}</dt>
 <dd>Formerly provided access to install and remove PKCS11 modules.</dd>
 <dt>{{domxref("Window.returnValue")}}</dt>
 <dd>The return value to be returned to the function that called {{domxref("window.showModalDialog()")}} to display the window as a modal dialog.</dd>
 <dt>{{domxref("Window.screen")}} {{readOnlyInline}}</dt>
 <dd>回傳一個與 window 關聯的 screen 物件。</dd>
 <dt>{{domxref("Window.screenX")}} {{readOnlyInline}}</dt>
 <dd>Returns the horizontal distance of the left border of the user's browser from the left side of the screen.</dd>
 <dt>{{domxref("Window.screenY")}} {{readOnlyInline}}</dt>
 <dd>Returns the vertical distance of the top border of the user's browser from the top side of the screen.</dd>
 <dt>{{domxref("Window.scrollbars")}} {{readOnlyInline}}</dt>
 <dd>Returns the scrollbars object, whose visibility can be toggled in the window.</dd>
 <dt>{{domxref("Window.scrollMaxX")}}{{non-standard_inline}}{{ReadOnlyInline}}</dt>
 <dd>The maximum offset that the window can be scrolled to horizontally, that is the document width minus the viewport width.</dd>
 <dt>{{domxref("Window.scrollMaxY")}}{{non-standard_inline}}{{ReadOnlyInline}}</dt>
 <dd>The maximum offset that the window can be scrolled to vertically (i.e., the document height minus the viewport height).</dd>
 <dt>{{domxref("Window.scrollX")}} {{readOnlyInline}}</dt>
 <dd>Returns the number of pixels that the document has already been scrolled horizontally.</dd>
 <dt>{{domxref("Window.scrollY")}} {{readOnlyInline}}</dt>
 <dd>Returns the number of pixels that the document has already been scrolled vertically.</dd>
 <dt>{{domxref("Window.self")}} {{ReadOnlyInline}}</dt>
 <dd>Returns an object reference to the window object itself.</dd>
 <dt>{{domxref("Window.sessionStorage")}}</dt>
 <dd>Returns a storage object for storing data within a single page session.</dd>
 <dt>{{domxref("Window.sidebar")}} {{non-standard_inline}}{{ReadOnlyInline}}</dt>
 <dd>Returns a reference to the window object of the sidebar.</dd>
 <dt>{{domxref("Window.speechSynthesis")}} {{ReadOnlyInline}}</dt>
 <dd>Returns a {{domxref("SpeechSynthesis")}} object, which is the entry point into using <a href="/zh-TW/docs/Web/API/Web_Speech_API">Web Speech API</a> speech synthesis functionality.</dd>
 <dt>{{domxref("Window.status")}}</dt>
 <dd>Gets/sets the text in the statusbar at the bottom of the browser.</dd>
 <dt>{{domxref("Window.statusbar")}} {{readOnlyInline}}</dt>
 <dd>Returns the statusbar object, whose visibility can be toggled in the window.</dd>
 <dt>{{domxref("Window.toolbar")}} {{readOnlyInline}}</dt>
 <dd>Returns the toolbar object, whose visibility can be toggled in the window.</dd>
 <dt>{{domxref("Window.top")}} {{readOnlyInline}}</dt>
 <dd>Returns a reference to the topmost window in the window hierarchy. This property is read only.</dd>
 <dt>{{domxref("Window.window")}} {{ReadOnlyInline}}</dt>
 <dd>Returns a reference to the current window.</dd>
 <dt><code>window[0]</code>,<code> window[1]</code>, etc.</dt>
 <dd>Returns a reference to the <code>window</code> object in the frames. See {{domxref("Window.frames")}} for more details.</dd>
</dl>

<h3 id="Properties_implemented_from_elsewhere">Properties implemented from elsewhere</h3>

<dl>
 <dt>{{domxref("WindowOrWorkerGlobalScope.caches")}} {{readOnlyinline}}</dt>
 <dd>Returns the {{domxref("CacheStorage")}} object associated with the current context. This object enables functionality such as storing assets for offline use, and generating custom responses to requests.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.indexedDB")}} {{readonlyInline}}</dt>
 <dd>Provides a mechanism for applications to asynchronously access capabilities of indexed databases; returns an {{domxref("IDBFactory")}} object.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.isSecureContext")}} {{readOnlyinline}}</dt>
 <dd>Returns a boolean indicating whether the current context is secure (<code>true</code>) or not (<code>false</code>).</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.origin")}} {{readOnlyinline}}</dt>
 <dd>Returns the global object's origin, serialized as a string. (This does not yet appear to be implemented in any browser.)</dd>
</dl>

<h2 id="方法">方法</h2>

<p><em>This interface inherits methods from the {{domxref("EventTarget")}} interface and implements methods from {{domxref("WindowOrWorkerGlobalScope")}} and {{domxref("EventTarget")}}.</em></p>

<dl>
 <dt>{{domxref("Window.alert()")}}</dt>
 <dd>Displays an alert dialog.</dd>
 <dt>{{domxref("Window.back()")}} {{Non-standard_inline}} {{obsolete_inline}}</dt>
 <dd>Moves back one in the window history.</dd>
 <dt>{{domxref("Window.blur()")}}</dt>
 <dd>Sets focus away from the window.</dd>
 <dt>{{domxref("Window.cancelAnimationFrame()")}} {{experimental_inline}}</dt>
 <dd>Enables you to cancel a callback previously scheduled with {{domxref("Window.requestAnimationFrame")}}.</dd>
 <dt>{{domxref("Window.cancelIdleCallback()")}} {{experimental_inline}}</dt>
 <dd>Enables you to cancel a callback previously scheduled with {{domxref("Window.requestIdleCallback")}}.</dd>
 <dt>{{domxref("Window.captureEvents()")}} {{Deprecated_inline}}</dt>
 <dd>Registers the window to capture all events of the specified type.</dd>
 <dt>{{domxref("Window.clearImmediate()")}}</dt>
 <dd>Cancels the repeated execution set using <code>setImmediate</code>.</dd>
 <dt>{{domxref("Window.close()")}}</dt>
 <dd>Closes the current window.</dd>
 <dt>{{domxref("Window.confirm()")}}</dt>
 <dd>Displays a dialog with a message that the user needs to respond to.</dd>
 <dt>{{domxref("Window.disableExternalCapture()")}} {{obsolete_inline(24)}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.dispatchEvent()")}}</dt>
 <dd>Used to trigger an event.</dd>
 <dt>{{domxref("Window.dump()")}} {{Non-standard_inline}}</dt>
 <dd>Writes a message to the console.</dd>
 <dt>{{domxref("Window.enableExternalCapture()")}} {{obsolete_inline(24)}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.find()")}}</dt>
 <dd>Searches for a given string in a window.</dd>
 <dt>{{domxref("Window.focus()")}}</dt>
 <dd>Sets focus on the current window.</dd>
 <dt>{{domxref("Window.forward()")}} {{Non-standard_inline}} {{obsolete_inline}}</dt>
 <dd>Moves the window one document forward in the history.</dd>
 <dt>{{domxref("Window.getAttention()")}} {{Non-standard_inline}} {{obsolete_inline}}</dt>
 <dd>Flashes the application icon.</dd>
 <dt>{{domxref("Window.getAttentionWithCycleCount()")}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.getComputedStyle()")}}</dt>
 <dd>Gets computed style for the specified element. Computed style indicates the computed values of all CSS properties of the element.</dd>
 <dt>{{domxref("Window.getDefaultComputedStyle()")}} {{Non-standard_inline}}</dt>
 <dd>Gets default computed style for the specified element, ignoring author stylesheets.</dd>
 <dt>{{domxref("Window.getSelection()")}}</dt>
 <dd>Returns the selection object representing the selected item(s).</dd>
 <dt>{{domxref("Window.home()")}} {{Non-standard_inline}} {{obsolete_inline}}</dt>
 <dd>Returns the browser to the home page.</dd>
 <dt>{{domxref("Window.matchMedia()")}} {{gecko_minversion_inline("6.0")}}</dt>
 <dd>Returns a {{domxref("MediaQueryList")}} object representing the specified media query string.</dd>
 <dt>{{domxref("Window.maximize()")}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.minimize()")}} (top-level XUL windows only)</dt>
 <dd>Minimizes the window.</dd>
 <dt>{{domxref("Window.moveBy()")}}</dt>
 <dd>Moves the current window by a specified amount.</dd>
 <dt>{{domxref("Window.moveTo()")}}</dt>
 <dd>Moves the window to the specified coordinates.</dd>
 <dt>{{domxref("Window.open()")}}</dt>
 <dd>Opens a new window.</dd>
 <dt>{{domxref("Window.openDialog()")}} {{Non-standard_inline}} {{obsolete_inline}}</dt>
 <dd>Opens a new dialog window.</dd>
 <dt>{{domxref("Window.postMessage()")}}</dt>
 <dd>Provides a secure means for one window to send a string of data to another window, which need not be within the same domain as the first.</dd>
 <dt>{{domxref("Window.print()")}}</dt>
 <dd>Opens the Print Dialog to print the current document.</dd>
 <dt>{{domxref("Window.prompt()")}}</dt>
 <dd>Returns the text entered by the user in a prompt dialog.</dd>
 <dt>{{domxref("Window.releaseEvents()")}} {{Non-standard_inline}} {{Deprecated_inline}}</dt>
 <dd>Releases the window from trapping events of a specific type.</dd>
 <dt>{{domxref("Window.requestAnimationFrame()")}} {{gecko_minversion_inline("2.0")}}</dt>
 <dd>Tells the browser that an animation is in progress, requesting that the browser schedule a repaint of the window for the next animation frame.</dd>
 <dt>{{domxref("Window.requestIdleCallback()")}} {{experimental_inline}}</dt>
 <dd>Enables the scheduling of tasks during a browser's idle periods.</dd>
 <dt>{{domxref("Window.resizeBy()")}}</dt>
 <dd>Resizes the current window by a certain amount.</dd>
 <dt>{{domxref("Window.resizeTo()")}}</dt>
 <dd>Dynamically resizes window.</dd>
 <dt>{{domxref("Window.restore()")}} {{Non-standard_inline}} {{obsolete_inline}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.routeEvent()")}} {{obsolete_inline(24)}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.scroll()")}}</dt>
 <dd>Scrolls the window to a particular place in the document.</dd>
 <dt>{{domxref("Window.scrollBy()")}}</dt>
 <dd>Scrolls the document in the window by the given amount.</dd>
 <dt>{{domxref("Window.scrollByLines()")}} {{Non-standard_inline}}</dt>
 <dd>Scrolls the document by the given number of lines.</dd>
 <dt>{{domxref("Window.scrollByPages()")}} {{Non-standard_inline}}</dt>
 <dd>Scrolls the current document by the specified number of pages.</dd>
 <dt>{{domxref("Window.scrollTo()")}}</dt>
 <dd>Scrolls to a particular set of coordinates in the document.</dd>
 <dt>{{domxref("Window.setCursor()")}} {{Non-standard_inline}} (top-level XUL windows only)</dt>
 <dd>Changes the cursor for the current window</dd>
 <dt>{{domxref("Window.setImmediate()")}}</dt>
 <dd>Executes a function after the browser has finished other heavy tasks</dd>
 <dt>{{domxref("Window.setResizable()")}} {{Non-standard_inline}}</dt>
 <dd>Toggles a user's ability to resize a window.</dd>
 <dt>{{domxref("Window.sizeToContent()")}} {{Non-standard_inline}}</dt>
 <dd>Sizes the window according to its content.</dd>
 <dt>{{domxref("Window.stop()")}}</dt>
 <dd>This method stops window loading.</dd>
 <dt>{{domxref("Window.updateCommands()")}} {{Non-standard_inline}}</dt>
 <dd>Updates the state of commands of the current chrome window (UI).</dd>
</dl>

<h3 id="Methods_implemented_from_elsewhere">Methods implemented from elsewhere</h3>

<dl>
 <dt>{{domxref("EventTarget.addEventListener()")}}</dt>
 <dd>Register an event handler to a specific event type on the window.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.atob()")}}</dt>
 <dd>Decodes a string of data which has been encoded using base-64 encoding.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.btoa()")}}</dt>
 <dd>Creates a base-64 encoded ASCII string from a string of binary data.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.clearInterval()")}}</dt>
 <dd>Cancels the repeated execution set using {{domxref("WindowOrWorkerGlobalScope.setInterval()")}}.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.clearTimeout()")}}</dt>
 <dd>Cancels the delayed execution set using {{domxref("WindowOrWorkerGlobalScope.setTimeout()")}}.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.createImageBitmap()")}}</dt>
 <dd>Accepts a variety of different image sources, and returns a {{domxref("Promise")}} which resolves to an {{domxref("ImageBitmap")}}. Optionally the source is cropped to the rectangle of pixels originating at <em>(sx, sy)</em> with width sw, and height sh.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.fetch()")}}</dt>
 <dd>Starts the process of fetching a resource from the network.</dd>
 <dt>{{domxref("EventTarget.removeEventListener")}}</dt>
 <dd>Removes an event listener from the window.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.setInterval()")}}</dt>
 <dd>Schedules a function to execute every time a given number of milliseconds elapses.</dd>
 <dt>{{domxref("WindowOrWorkerGlobalScope.setTimeout()")}}</dt>
 <dd>Schedules a function to execute in a given amount of time.</dd>
</dl>

<h3 id="Obsolete_methods">Obsolete methods</h3>

<dl>
 <dt>{{domxref("Window.showModalDialog()")}} {{obsolete_inline}}</dt>
 <dd>Displays a modal dialog. <strong>This method was removed completely in Chrome 43, and Firefox 55.</strong></dd>
</dl>

<h2 id="事件處理器">事件處理器</h2>

<p>These are properties of the window object that can be set to establish event handlers for the various things that can happen in the window that might be of interest.</p>

<p><em>This interface inherits event handlers from the {{domxref("EventTarget")}} interface and implements event handlers from {{domxref("WindowEventHandlers")}}.</em></p>

<div class="note">
<p><strong>Note:</strong> Starting in {{Gecko("9.0")}}, you can now use the syntax <code>if ("onabort" in window)</code> to determine whether or not a given event handler property exists. This is because event handler interfaces have been updated to be proper web IDL interfaces. See <a href="/zh-TW/docs/DOM/DOM_event_handlers">DOM event handlers</a> for details.</p>
</div>

<dl>
 <dt>{{domxref("GlobalEventHandlers.onabort")}}</dt>
 <dd>Called when the loading of a resource has been aborted, such as by a user canceling the load while it is still in progress</dd>
 <dt>{{domxref("WindowEventHandlers.onafterprint")}}</dt>
 <dd>Called when the print dialog box is closed. See {{event("afterprint")}} event.</dd>
 <dt>{{domxref("WindowEventHandlers.onbeforeprint")}}</dt>
 <dd>Called when the print dialog box is opened. See {{event("beforeprint")}} event.</dd>
 <dt>{{domxref("Window.onbeforeinstallprompt")}}</dt>
 <dd>An event handler property dispatched before a user is prompted to save a web site to a home screen on mobile.</dd>
 <dt>{{domxref("WindowEventHandlers.onbeforeunload")}}</dt>
 <dd>An event handler property for before-unload events on the window.</dd>
 <dt>{{domxref("GlobalEventHandlers.onblur")}}</dt>
 <dd>Called after the window loses focus, such as due to a popup.</dd>
 <dt>{{domxref("GlobalEventHandlers.onchange")}}</dt>
 <dd>An event handler property for change events on the window.</dd>
 <dt>{{domxref("GlobalEventHandlers.onclick")}}</dt>
 <dd>Called after the ANY mouse button is pressed &amp; released</dd>
 <dt>{{domxref("GlobalEventHandlers.ondblclick")}}</dt>
 <dd>Called when a double click is made with ANY mouse button.</dd>
 <dt>{{domxref("GlobalEventHandlers.onclose")}}</dt>
 <dd>Called after the window is closed</dd>
 <dt>{{domxref("GlobalEventHandlers.oncontextmenu")}}</dt>
 <dd>Called when the RIGHT mouse button is pressed</dd>
 <dt>{{domxref("Window.ondevicelight")}}</dt>
 <dd>An event handler property for any ambient light levels changes</dd>
 <dt>{{domxref("Window.ondevicemotion")}} {{gecko_minversion_inline("6.0")}}</dt>
 <dd>Called if accelerometer detects a change (For mobile devices)</dd>
 <dt>{{domxref("Window.ondeviceorientation")}} {{gecko_minversion_inline("6.0")}}</dt>
 <dd>Called when the orientation is changed (For mobile devices)</dd>
 <dt>{{domxref("Window.ondeviceorientationabsolute")}} {{non-standard_inline}} Chrome only</dt>
 <dd>An event handler property for any device orientation changes.</dd>
 <dt>{{domxref("Window.ondeviceproximity")}}</dt>
 <dd>An event handler property for device proximity event</dd>
 <dt>{{domxref("GlobalEventHandlers.onerror")}}</dt>
 <dd>Called when a resource fails to load OR when an error occurs at runtime. See {{event("error")}} event.</dd>
 <dt>{{domxref("GlobalEventHandlers.onfocus")}}</dt>
 <dd>Called after the window receives or regains focus. See {{event("focus")}} events.</dd>
 <dt>{{domxref("WindowEventHandlers.onhashchange")}} {{gecko_minversion_inline("1.9.2")}}</dt>
 <dd>An event handler property for {{event('hashchange')}} events on the window; called when the part of the URL after the hash mark ("#") changes.</dd>
 <dt>{{domxref("Window.onappinstalled")}}</dt>
 <dd>Called when the page is installed as a webapp. See {{event('appinstalled')}} event.</dd>
 <dt>{{domxref("Window.ongamepadconnected")}}</dt>
 <dd>Represents an event handler that will run when a gamepad is connected (when the {{event('gamepadconnected')}} event fires).</dd>
 <dt>{{domxref("Window.ongamepaddisconnected")}}</dt>
 <dd>Represents an event handler that will run when a gamepad is disconnected (when the {{event('gamepaddisconnected')}} event fires).</dd>
 <dt>{{domxref("Window.oninput")}}</dt>
 <dd>Called when the value of an &lt;input&gt; element changes</dd>
 <dt>{{domxref("GlobalEventHandlers.onkeydown")}}</dt>
 <dd>Called when you begin pressing ANY key. See {{event("keydown")}} event.</dd>
 <dt>{{domxref("GlobalEventHandlers.onkeypress")}}</dt>
 <dd>Called when a key (except Shift, Fn, and CapsLock) is in pressed position. See {{event("keypress")}} event.</dd>
 <dt>{{domxref("GlobalEventHandlers.onkeyup")}}</dt>
 <dd>Called when you finish releasing ANY key. See {{event("keyup")}} event.</dd>
 <dt>{{domxref("WindowEventHandlers.onlanguagechange")}}</dt>
 <dd>An event handler property for {{event("languagechange")}} events on the window.</dd>
 <dt>{{domxref("GlobalEventHandlers.onload")}}</dt>
 <dd>Called after all resources and the DOM are fully loaded. WILL NOT get called when the page is loaded from cache, such as with back button.</dd>
 <dt>{{domxref("WindowEventHandlers.onmessage")}}</dt>
 <dd>Is an {{event("Event_handlers")}} representing the code to be called when the {{event("message")}} event is raised.</dd>
 <dt>{{domxref("GlobalEventHandlers.onmousedown")}}</dt>
 <dd>Called when ANY mouse button is pressed.</dd>
 <dt>{{domxref("GlobalEventHandlers.onmousemove")}}</dt>
 <dd>Called continously when the mouse is moved inside the window.</dd>
 <dt>{{domxref("GlobalEventHandlers.onmouseout")}}</dt>
 <dd>Called when the pointer leaves the window.</dd>
 <dt>{{domxref("GlobalEventHandlers.onmouseover")}}</dt>
 <dd>Called when the pointer enters the window</dd>
 <dt>{{domxref("GlobalEventHandlers.onmouseup")}}</dt>
 <dd>Called when ANY mouse button is released</dd>
 <dt>{{domxref("Window.onmozbeforepaint")}} {{gecko_minversion_inline("2.0")}}</dt>
 <dd>An event handler property for the <code>MozBeforePaint</code> event, which is sent before repainting the window if the event has been requested by a call to the {{domxref("Window.mozRequestAnimationFrame()")}} method.</dd>
 <dt>{{domxref("WindowEventHandlers.onoffline")}}</dt>
 <dd>Called when network connection is lost. See {{event("offline")}} event.</dd>
 <dt>{{domxref("WindowEventHandlers.ononline")}}</dt>
 <dd>Called when network connection is established. See {{event("online")}} event.</dd>
 <dt>{{domxref("WindowEventHandlers.onpagehide")}}</dt>
 <dd>Called when the user navigates away from the page, before the onunload event. See {{event("pagehide")}} event.</dd>
 <dt>{{domxref("WindowEventHandlers.onpageshow")}}</dt>
 <dd>Called after all resources and the DOM are fully loaded. See {{event("pageshow")}} event.</dd>
 <dt>{{domxref("Window.onpaint")}}</dt>
 <dd>An event handler property for paint events on the window.</dd>
 <dt>{{domxref("WindowEventHandlers.onpopstate")}} {{gecko_minversion_inline("2.0")}}</dt>
 <dd>Called when a back putton is pressed.</dd>
 <dt>{{domxref("Window.onrejectionhandled")}} {{experimental_inline}}</dt>
 <dd>An event handler for handled {{jsxref("Promise")}} rejection events.</dd>
 <dt>{{domxref("GlobalEventHandlers.onreset")}}</dt>
 <dd>Called when a form is reset</dd>
 <dt>{{domxref("GlobalEventHandlers.onresize")}}</dt>
 <dd>Called continuously as you are resizing the window.</dd>
 <dt>{{domxref("GlobalEventHandlers.onscroll")}}</dt>
 <dd>Called when the scroll bar is moved via ANY means. If the resource fully fits in the window, then this event cannot be invoked</dd>
 <dt>{{domxref("GlobalEventHandlers.onwheel")}}</dt>
 <dd>Called when the mouse wheel is rotated around any axis</dd>
 <dt>{{domxref("GlobalEventHandlers.onselect")}}</dt>
 <dd>Called after text in an input field is selected</dd>
 <dt>{{domxref("GlobalEventHandlers.onselectionchange")}}</dt>
 <dd>Is an {{event("Event_handlers")}} representing the code to be called when the {{event("selectionchange")}} event is raised.</dd>
 <dt>{{domxref("WindowEventHandlers.onstorage")}}</dt>
 <dd>Called when there is a change in session storage or local storage. See {{event("storage")}} event</dd>
 <dt>{{domxref("GlobalEventHandlers.onsubmit")}}</dt>
 <dd>Called when a form is submitted</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>Called when the user navigates away from the page.</dd>
 <dt>{{domxref("Window.onuserproximity")}}</dt>
 <dd>An event handler property for user proximity events.</dd>
 <dt>{{domxref("Window.onvrdisplayconnect")}}</dt>
 <dd>Represents an event handler that will run when a compatible VR device has been connected to the computer (when the {{event("vrdisplayconnected")}} event fires).</dd>
 <dt>{{domxref("Window.onvrdisplaydisconnect")}}</dt>
 <dd>Represents an event handler that will run when a compatible VR device has been disconnected from the computer (when the {{event("vrdisplaydisconnected")}} event fires).</dd>
 <dt>{{domxref("Window.onvrdisplayactivate")}}</dt>
 <dd>Represents an event handler that will run when a display is able to be presented to (when the {{event("vrdisplayactivate")}} event fires), for example if an HMD has been moved to bring it out of standby, or woken up by being put on.</dd>
 <dt>{{domxref("Window.onvrdisplaydeactivate")}}</dt>
 <dd>Represents an event handler that will run when a display can no longer be presented to (when the {{event("vrdisplaydeactivate")}} event fires), for example if an HMD has gone into standby or sleep mode due to a period of inactivity.</dd>
 <dt>{{domxref("Window.onvrdisplayblur")}}</dt>
 <dd>Represents an event handler that will run when presentation to a display has been paused for some reason by the browser, OS, or VR hardware (when the {{event("vrdisplayblur")}} event fires) — for example, while the user is interacting with a system menu or browser, to prevent tracking or loss of experience.</dd>
 <dt>{{domxref("Window.onvrdisplayfocus")}}</dt>
 <dd>Represents an event handler that will run when presentation to a display has resumed after being blurred (when the {{event("vrdisplayfocus")}} event fires).</dd>
 <dt>{{domxref("Window.onvrdisplaypresentchange")}}</dt>
 <dd>represents an event handler that will run when the presenting state of a VR device changes — i.e. goes from presenting to not presenting, or vice versa (when the {{event("vrdisplaypresentchange")}} event fires).</dd>
</dl>

<h2 id="建構式">建構式</h2>

<p>See also the <a href="/zh-TW/docs/DOM/DOM_Reference" title="/zh-TW/docs/DOM/DOM_Reference">DOM Interfaces</a>.</p>

<dl>
 <dt>{{domxref("DOMParser")}}</dt>
 <dd><code>DOMParser</code> can parse XML or HTML source stored in a string into a DOM <a href="https://developer.mozilla.org/zh-TW/docs/DOM/document" title="document">Document</a>. <code>DOMParser</code> is specified in <a href="https://w3c.github.io/DOM-Parsing/" title="http://html5.org/specs/dom-parsing.html">DOM Parsing and Serialization</a>.</dd>
 <dt>{{domxref("Window.GeckoActiveXObject")}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Image")}}</dt>
 <dd>Used for creating an {{domxref("HTMLImageElement")}}.</dd>
 <dt>{{domxref("Option")}}</dt>
 <dd>Used for creating an {{domxref("HTMLOptionElement")}}</dd>
 <dt>{{domxref("Window.QueryInterface")}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.XMLSerializer")}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Worker")}}</dt>
 <dd>Used for creating a <a href="/zh-TW/docs/DOM/Using_web_workers">Web worker</a></dd>
 <dt>{{domxref("Window.XPCNativeWrapper")}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
 <dt>{{domxref("Window.XPCSafeJSObjectWrapper")}}</dt>
 <dd>{{todo("NeedsContents")}}</dd>
</dl>

<h2 id="相關介面">相關介面</h2>

<p>請參閱 {{domxref("Document_Object_Model", "DOM Reference")}}</p>

<h2 id="參見">參見</h2>

<ul>
 <li><a href="/zh-TW/docs/Working_with_windows_in_chrome_code">Working with windows in chrome code</a></li>
</ul>