Tooltip.onbeforeopen event

Raised just before the Tooltip appears.

Syntax

<div data-win-control="WinJS.UI.Tooltip" 
    data-win-options="{onbeforeopen : handler}">
</div>

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

Event information

Event handler parameters

• eventInfo
  Type: CustomEvent**

  An object that contains information about the event.

Remarks

Setting event handlers declaratively (in HTML)

To set the event handler declaratively, it must be accessible to the global scope, and you must also call WinJS.Utilities.markSupportedForProcessing or WinJS.UI.eventHandler on the handler. You can make the handler accessible to the global scope by using WinJS.Namespace.define. For more information, see How to set event handlers declaratively.

Requirements

See also

Tooltip