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This is a feature request. Feature: New simple events which are dispatched on opening/closing any native popup-like UI such as <select> menu popups, <input list> popups, and <input type=date> calendar picker. The event names would be 'open' and 'close'. Usecase: A web application has a menu-like UI built from scratch. - We want to close the opening menu when any native popups are opened. We have no generic way to detect it. - If a native popup was opened in an element inside the menu, we want to close the menu when the native popup is closed. See https://code.google.com/p/chromium/issues/detail?id=303971#c2
Interesting idea. Any other vendors interested in this?
cc'ing some more people. This seems like a reasonable important feature for a platform with native widgets to have, if we expect people to also develop their own widgets. Is this something anyone would be willing to implement? Firefox? IE? Safari?
With W3C Bugzilla closing, we're marking all feature requests as WONTFIX, or at least wontfix-in-this-bugtracker. Please feel free to reopen on https://github.com/whatwg/html/issues if you still believe in the feature and want to discuss it further.
I think https://github.com/whatwg/html/issues/3976 is almost equivalent to this.