AJAX toolkit selection criteria
david.bolter at utoronto.ca
Thu Apr 5 14:04:24 UTC 2007
Colin Clark wrote:
> Hi Antranig,
> On 4-Apr-07, at 2:21 PM, Antranig Basman wrote:
>> The need for a lot of the event frameworks would seem to be
>> considerably mitigated by use of a more closure-based programming
>> style - that is, having ones handlers be simple null-arg functions
>> which instead of relying on "this" have all of their relevant
>> context closed over already.
>> Are there any other aspects of event handling that we think could
>> usefully be abstracted? So far I do not seem to have run into any
>> of these requirements yet in the RSF widgets I have built so far,
>> which just use the standard DOM events - they are many of them
>> admittedly quite simple things.
> This is an interesting point, and I will admit that I don't have the
> experience to know if the various event systems in current toolkits
> are actually valuable. Most of them seem to provide some event
> support beyond the standard DOM events. Perhaps we shouldn't consider
> this a particularly important criteria, then? Does anyone have any
> opinions about the event model in Dojo or other toolkits?
First, thanks to all who clarified
> diff -u
- even abstraction
+ event abstraction
Well, I was going to reply as Antranig did with something vaguely
similar but not nearly as coherent or deep. A quick introduction about
myself here... I'm working specifically on dojo accessibility (ARIA, and
keyboard access). With the bugs I have worked on so far, I haven't
developed a strong opinion or deep understanding of the dojo event
system as it is actually implemented. As Antranig discusses elsewhere in
his response regarding YUI and"this", I can say Dojo provides similar
support through "hitch" (of whether that's good or bad I don't have an
I haven't made use of dojo's publish and subscribe system yet and
haven't formed an opinion. The site is down at the moment so I can't
brush up on my knowledge for a more informed response.
With browser events generally, I think any toolkit is probably going to
want to provide a developer with wrapper API for browser normalization.
e.g. dojo.event.browser.addListener(node, "contextmenu", this.hitchedOpen);
This function does some event normalization including some handy key
event normalization etc.
I hate IE.
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