[1] [CITE@en[Timing and Synchronization in JavaScript - Opera Developer Community]] ([TIME[2009-06-07 11:12:38 +09:00]] 版) <http://dev.opera.com/articles/view/timing-and-synchronization-in-javascript/>

[2] [CITE@en[Web Applications 1.0 r6966     Allow browsers to bail early for showModalDialog, alert, confirm, and prompt during pagehide, beforeunload, and unload events.]]
( ([TIME[2012-02-07 07:54:00 +09:00]] 版))
<http://html5.org/tools/web-apps-tracker?from=6965&to=6966>