Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The mozbrowservisibilitychange event is fired when the visibility state of the current browser iframe <iframe> changes, for example due to a call to setVisible().

General info

Specification
Non standard
Interface
CustomEvent
Bubbles
Yes
Cancelable
Yes
Target
<iframe>
Default Action
None

Properties

Property Type Description
target Read only EventTarget The browser iframe
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.
details Read only Object A custom object.

details

The details property returns an anonymous JavaScript object with the following properties:

visible
A Boolean that indicates whether the browser iframe is visible (true) or not (false).

Example

var browser = document.querySelector("iframe");

browser.addEventListener("mozbrowservisibilitychange", function( event ) {
  if(event.details.visible) {
    console.log("The browser is visible.");
  } else {
    console.log("The browser is hidden.");
  }
});

See also