28455 2015-04-09 21:38:06 +0000 Add a method to add a one-time event listener 2016-04-08 11:26:04 +0000 1 1 1 Unclassified WebAppsWG DOM unspecified Other All RESOLVED MOVED pending new event API P2 normal --- 1 xidorn+w3c annevk crimsteam mike mounir sebastianzartner www-dom public-webapps-bugzilla oldest_to_newest 119414 0 xidorn+w3c 2015-04-09 21:38:06 +0000 It seems to be a common pattern to have code like: element.addEventListener("click", function onClick(event) { element.removeEventListener("click", onClick); ... }); jQuery has method ".one()" to simplify this pattern. I think it would be great if DOM directly includes a method for this in EventTarget. Probably this method could be: void listenForNextEvent(DOMString type, EventListener? callback, optional boolean capture = false); 119671 1 sebastianzartner 2015-04-20 07:26:50 +0000 > Probably this method could be: > > void listenForNextEvent(DOMString type, EventListener? callback, optional > boolean capture = false); Or the existing method could be extended by a fourth parameter: void addEventListener(DOMString type, EventListener? callback, optional boolean capture = false, optional boolean once = false) Sebastian 120925 2 crimsteam 2015-06-12 07:44:11 +0000 I'm vote for this because do this a lot of time... and will be nice if this new stuff can remove anonymous callback too. 125466 3 annevk 2016-03-14 13:16:47 +0000 Closing this for now. If we do this we should have a new better event API in general, that addresses a number of concerns. https://gist.github.com/annevk/4475457 has a sketch of such a thing, if you're interested. 125775 4 annevk 2016-04-08 11:26:04 +0000 This is now https://github.com/whatwg/dom/pull/207. I found a way to do this now addEventListener() takes options. Would love your feedback.