History of Document.hasFocus() Revision history for: English (US) Jun 8, 2016, 11:29:02 AM turadg Opera supports it https://dev.opera.com/blog/page-visibility-api-support-in-opera-12-10/ Previous May 22, 2016, 3:26:23 PM BenLF Editorial review completed. Previous May 22, 2016, 3:25:51 PM BenLF Changed "For example, an active element within a (popup) window that is not the foreground has no focus." to "For example, an active element within a popup window that is not the foreground does not have focus." Previous Apr 11, 2016, 5:01:04 AM scunliffe Updated the function names to start lower case (following standard conventions) since neither are JavaScript "classes" Previous Sep 26, 2015, 3:46:54 AM teoli spec table & fix spec linkWeb/API/temp_document/hasFocus Web/API/Document/hasFocus Previous Sep 26, 2015, 3:34:57 AM teoli spec table & fix spec linkWeb/API/Document/hasFocus Web/API/temp_document/hasFocus Previous Aug 8, 2015, 10:57:49 AM cvrebert spec table & fix spec link Previous Jun 13, 2015, 10:47:03 PM teoli Added sidebar Previous Jun 13, 2015, 10:31:13 PM hirokiosame Previous Jun 13, 2015, 10:29:59 PM hirokiosame