Note
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Occurs immediately before the ToolBar is closed.
Learn about events with Quickstart: adding HTML controls and handling events.
Syntax
<div data-win-control="WinJS.UI.ToolBar" data-win-options="{onbeforeclose : handler}" />
function handler(eventInfo) { /* Your code */ }
// addEventListener syntax
toolBar.addEventListener("beforeclose", handler);
toolBar.removeEventListener("beforeclose", handler);
Event information
| Synchronous | No |
| Bubbles | Yes |
| Cancelable | Yes |
Event handler parameters
eventInfo
Type: CustomEvent**An object that contains information about the event.
Requirements
Minimum WinJS version |
WinJS 4.0 |
Namespace |
WinJS.UI |