VisibilityChangeEvent"
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Latest revision as of 11:07, 7 January 2022
VisibilityChangeEvent
- Demonstration: N/A
- Java API: VisibilityChangeEvent
- JavaScript API: N/A
Employment/Purpose
This event is fired when users change a browser page visibility e.g. switch to another tab or switch back. You should listen to this event on the root component of a page.
ZK implements it based on W3C page visibility.
Example
Basic
<window title="window" border="normal">
<attribute name="onVisibilityChange">
if (!event.isHidden())
lbl.setValue("Welcome back");
</attribute>
<label id="lbl"></label>
</window>
Chatroom
In a chatroom application, you detect a user who switches to another tab, then notify other users. Please check the complete source.
Version History
| Version | Date | Content |
|---|---|---|
| 6.5.1 | December 2, 2012 | introduced in Control page visibility with HTML5 API in ZK |