WindowClient.visibilityState

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The visibilityState read-only property of the WindowClient interface indicates the visibility of the current client. This value can be one of hidden, visible, prerender, or unloaded.

Syntax

myVisState = WindowClient.visibilityState;

Value

A DOMString.

Example

  event.waitUntil(clients.matchAll({
    type: "window"
  }).then(function(clientList) {
    for (var i = 0; i < clientList.length; i++) {
      var client = clientList[i];
      if (client.url == '/' && 'focus' in client) {
        if(visibilityState === 'hidden')
          return client.focus();
        }
      }
    }
    if (clients.openWindow)
      return clients.openWindow('/');
  }));
});

Specifications

Specification	Status	Comment
Service Workers The definition of 'WindowClient' in that specification.	Working Draft	Initial definition.

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	42.0	44.0 (44.0)^[1]	No support	?	No support

Feature	Android	Firefox Mobile (Gecko)	Firefox OS	IE Mobile	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	?	44.0 (44.0)	(Yes)	No support	?	No support	42.0

[1] Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)

Syntax

Value

Example

Specifications

Browser compatibility

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