AppBar.onbeforeopen event

Occurs immediately before a closed AppBar is displayed.

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

Syntax

function handler(eventInfo) { /* Your code */ }
 
// addEventListener syntax
appBar.addEventListener("beforeopen", handler);
appBar.removeEventListener("beforeopen", handler);
 
- or -

appBar.onbeforeopen = handler;

Event information

Synchronous	No
Bubbles	Yes
Cancelable	Yes

 

Event handler parameters

• eventInfo
  Type: Event**

  An object that contains information about the event.

Requirements

Minimum WinJS version	WinJS 4.0
Namespace	WinJS.UI

See also

AppBar

AppBarCommand

AppBarIcon

BackButton

NavBar

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