TL;DR: Would it be OK to implement constructors for DOM4 Events in WebKit without waiting for the spec?
== Background == Events should have constructors. 'new XXXEvent()' is much easier than 'e = document.createEvent(...); e.initXXXEvent(_a_lot_of_arguments_)'. We have already implemented constructors for a bunch of Events such as Event, CustomEvent, ProgressEvent, etc [5]. However, we have not yet implemented constructors for DOM4 Events (i.e. UIEvent, MouseEvent, KeyboardEvent, WheelEvent, TextEvent, CompositionEvent) because they are not yet speced. Recently PointerEvent was speced with [Constructor] [2]. Considering that PointerEvent inherits MouseEvent, now we want to support [Constructor] on MouseEvent too. In terms of implementation, it is possible to implement [Constructor] on PointerEvent without implementing [Constructor] on MouseEvent. However, implementing [Constructor] on both PointerEvent and MouseEvent would be best. == Rationale for implementing constructors for DOM4 Events == I have been discussing this topic for one year, in www-dom@ [4] and a www.w3.org bug [3]. It looks like there is a consensus on introducing constructors for DOM4 Events. However, the spec is still a draft [1] and the www.w3.org bug [3] is marked as LATER. Last week I discussed the timeline of the spec with Jacob Rossi (a.k.a. a spec author of PointerEvent and DOM4 Events). According to him: - Their primary focus is on finishing DOM3 Events first. - With DOM3 Events in Candidate Recommendation, they are going to start working on the DOM4 Events. They will discuss it in TPAC. - They will introduce constructors to DOM4 Events. In summary, constructors for DOM4 Events are going to be speced, but it will take time. So I would like to implement them in WebKit a bit ahead of the spec (and thus implement PointerEvent constructors too). If you have any concern, please let me know. == References == [1] The spec draft by Jacob Rossi: http://html5labs.interoperabilitybridges.com/dom4events/ [2] The spec of Pointer Events: http://www.w3.org/Submission/pointer-events/ [3] www.w3.org bug: https://www.w3.org/Bugs/Public/show_bug.cgi?id=14051 [4] Discussion on www-dom@: http://lists.w3.org/Archives/Public/www-dom/2011OctDec/0081.html http://lists.w3.org/Archives/Public/www-dom/2012JanMar/0025.html [5] WebKit bug: https://bugs.webkit.org/show_bug.cgi?id=67824 -- Kentaro Hara, Tokyo, Japan (http://haraken.info) _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org http://lists.webkit.org/mailman/listinfo/webkit-dev