popupshowing

The popupshowing event is executed when a <menupopup>, <panel> or <tooltip> is about to become visible. The default action of the event can be prevented to prevent the popup to appear.

General info

Specification: XUL
Interface: PopupEvent
Bubbles: Yes
Cancelable: Yes
Target: element
Default Action: A popup is displayed

Properties

Property	Type	Description
`target` Read only	`EventTarget`	The event target (the topmost target in the DOM tree).
`type` Read only	`DOMString`	The type of event.
`bubbles` Read only	`Boolean`	Whether the event normally bubbles or not.
`cancelable` Read only	`Boolean`	Whether the event is cancellable or not.