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https://developer.mozilla.org/en-US/docs/Web/API/Element/focusin_event
Mar 31, 2019 · The focusin event fires when an element is about to receive focus. The main difference between this event and focus is that focusin bubbles while focus does not.. The opposite of focusin is …
https://stackoverflow.com/questions/7337670/how-to-detect-focusin-support
Thanks to Perfection kills, we can use the following JavaScript to detect event support: function hasEvent(ev) { var elem = document.createElement('a'), type = 'on' + ev, suppo... Stack Overflow. Products ... This method has the advantage of being light and unobtrusive and it will tell you whether the browser supports the focusin event.
https://www.w3schools.com/jsref/event_onfocusin.asp
Tip: Although Firefox does not support the onfocusin event, you can find out whether a child of an element gets the focus or not, by using a capturing listener for the onfocus event (using the optional useCapture parameter of the addEventListener() method). Tip: The onfocusin event is the opposite of the onfocusout event.
https://developer.mozilla.org/en-US/docs/Web/API/Element/focusout_event
The focusout event fires when an element is about to lose focus. The main difference between this event and blur is that focusout bubbles while blur does not.. The opposite of focusout is focusin.
http://help.dottoro.com/ljggspvo.php
onfocusin event focusin event. Browser support: Occurs before an element receives focus. The onfocusin event bubbles up (unlike the onfocus event), so if you want to detect whether an element or its child gets the focus, it is sufficient to listen for the onfocusin event of the element.
https://bugzilla.mozilla.org/show_bug.cgi?id=687787
The event sequence is either: (for focuses) - focusin - focus or (for refocuses) - focusout - focusin - blur - focus (for unfocuses) - focusout - blur Additionally, add the necessary attributes to ensure only one focus occurs as the result of a series of events.
https://api.jquery.com/focusin/
The focusin event is sent to an element when it, or any element inside of it, gains focus. This is distinct from the focus event in that it supports detecting the focus event on parent elements (in other words, it supports event bubbling).
https://github.com/jquery/jquery/commit/bbd9c776ea22296a6807d5b760bd4e82ee5f4414
True, what I'm testing (is focusin supported on a div) and what I'm asserting as a result (focusin bubbles) are more than a few feet away from each other. However I think it's true for the set of browsers we support. I could nest elements and test for actual bubbling, but since we run this stuff on every page load I figured it was best to keep it light.
https://gist.github.com/nuxodin/9250e56a3ce6c0446efa
Jun 05, 2019 · focusin focusout support for firefox. GitHub Gist: instantly share code, notes, and snippets. ... /* focusin/out event polyfill (firefox) */! function (){var w = window, d = w. document; ... Thanks. That does the trick. FF still does not support these events in August 2015. They did drop the ball at some point in time.
https://github.com/jquery/jquery/issues/2360
May 29, 2015 · Currently Firefox (version 38) doesn't support the focusin and focusout events: bugzilla. However, jQuery does. jQuery simulates the focusin and focusout events from the focus and blur events accordingly, but in Firefox, it doesn't get fired when an element is removed from the DOM.
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