WinJS.UI.Menu object

Artikel
01/26/2017

Displays a lightweight popup that is used to temporarily show menu commands related to what the user is currently doing. You should only show a menu in response to a user tap or click. Unlike a MessageDialog, a menu is always dismissed when the user taps or clicks outside of it.

Note Use a context menu, not a flyout, for contextual actions on a text selection.

Syntax

<div data-win-control="WinJS.UI.Menu" />

var object = new WinJS.UI.Menu();

Members

The Menu object has these types of members:

Constructors
Events
Methods
Properties

Constructors

The Menu object has these constructors.

Constructor	Description
Menu	Creates a new Menu object.

Events

The Menu object has these events.

Event	Description
onafterhide	Occurs immediately after the Menu is hidden.
onaftershow	Occurs immediately after the Menu is displayed.
onbeforehide	Occurs before the Menu is hidden
onbeforeshow	Occurs immediately before a hidden Menu is displayed.

Methods

The Menu object has these methods.

Method	Description
addEventListener	Registers an event handler for the specified event.
dispose	Releases resources held by this Menu. Call this method when the Menu is no longer needed. After calling this method, the Menu becomes unusable.
getCommandById	Returns the MenuCommand object identified by id.
hide	Hides the Menu, if visible, regardless of other states.
hideCommands	Hides the specified commands of the Menu.
removeEventListener	Removes an event handler that the addEventListener method registered.
show	Shows the Menu, if hidden, regardless of other states.
showat	Shows the Menu, if hidden, regardless of other states, top and left aligned at specified coordinates or at the location of the mouse event object.
showCommands	Shows the specified commands of the Menu.
showOnlyCommands	Shows the specified commands of the Menu while hiding all other commands.

Properties

The Menu object has these properties.

Property	Access type	Description
alignment	Read/write	Gets or sets the default alignment to be used for this Menu.
anchor	Read/write	Gets or sets the default anchor to be used for this Menu.
commands	Write-only	Sets the MenuCommand objects that appear in the menu
disabled	Read/write	Gets or sets a value that indicates whether the Menu is disabled.
element	Read-only	Gets the DOM element that hosts the Menu.
hidden	Read-only	Gets a value that indicates whether the Menu is hidden or in the process of becoming hidden.
placement	Read/write	Gets or sets the placement to be used for this Menu relative to the target object.

Remarks

Known Issues

Menus should be direct children of document.body. Otherwise, it is possible to mask event detection on the Menu due to stacking context effects. This is because event detection for other elements is blocked while the Menu is open. So, if the Flyout is a child of one of those blocked elements, it too will be blocked. This behavior is typical for all overlaying controls.

To customize a Menu, you can define your own styles for these CSS classes (defined by the Windows Library for JavaScript style sheets):

CSS class	Description
win-command	Styles the commands in the Menu.
win-menu	Styles the entire Menu control.

Note There are several CSS classes that are shared between multiple WinJS controls. To limit your custom styles to a specific control, assign the control an ID or custom class name and use that as part of your style selector.

Requirements

Minimum WinJS version	WinJS 1.0
Namespace	WinJS.UI

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