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NavBar.onbeforeclose event

[NavBar is no longer available for use as of Windows Library for JavaScript (WinJS) 4.2. Instead, use SplitViewCommand. ]

Occurs before the NavBar is closed.

Learn about events with Quickstart: adding HTML controls and handling events.

Syntax

<div data-win-control="WinJS.UI.NavBar" data-win-options="{onbeforeclose : handler}" />
function handler(eventInfo) { /* Your code */ }
 
// addEventListener syntax
navBar.addEventListener("beforeclose", handler);
navBar.removeEventListener("beforeclose", handler);

Event information

Synchronous No
Bubbles Yes
Cancelable Yes

 

Event handler parameters

  • eventInfo
    Type: Event**

    An object that contains information about the event.

Remarks

This replaces the onbeforehide event, which has been removed.

Requirements

Minimum WinJS version

WinJS 4.0

Namespace

WinJS.UI

See also

NavBar

NavBarCommand

NavBarContainer

BackButton

AppBar

Your first app - Part 3: PageControl objects and navigation

Navigating between pages (HTML)

Adding app bars

Adding nav bars

HTML AppBar control sample

HTML NavBar control sample

Navigation and navigation history sample

Designers

Command patterns

Navigation patterns

Guidelines for app bars

Bottom app bar

Top app bar