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[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
Your first app - Part 3: PageControl objects and navigation
Navigating between pages (HTML)
Navigation and navigation history sample
Designers
Bottom app bar
Top app bar