What's Missing in Deer Park
The Mozilla Foundatio...er...Corporation has released Alpha 2 of the next release of Firefox, and there's a lot of good stuff in it. On the whole, it feels faster, and tons of exciting stuff has already landed in this release.
Aside from E4X, it's hard to see how Deer Park is going to make my life much better as a DHTML developer, though. The story on rich-text editing is still grim. <canvas> is a disaster whose impact is only lessened by the inclusion of a minimal SVG subset. The platform is overall improving, but XUL apps still require enduring an RDF mind-fuck in order to get off the ground. Overall, you get the feeling that Deer Park is 2 steps sideways, one step forward.
But it wouldn't take much to change that from the perspective of the DHTML, nee, "Ajax" developer. Here are a couple of simple-ish things that would make our lives immeasurably better:
- Local string caching from script
This is a strange name for a very very powerful capability: caching. Webdevs today need a coherent, simple, and workable local cache which can be accessed form script like any other object/hash and which stores only strings. Such a cache needs only a couple of properties to be wildly successful. Firstly, use the exact same-domain policy as cookies currently are subject to. Secondly, tell me (from script) how big the cache is and how much space is still free. Thirdly, let us specify expiry and flushing policies for it from script (not via HTTP headers). But please, whatever you do, do NOT over-think this problem.
- Event-transparency in the z-order and positioned event generation
Allow developers to specify that a particular DOM node is "transparent" to DOM events. Which is to say, it passes them "down" the z-index stack without triggering a dispatch or bubble sequence in any way. This should probably be handled by a "-moz-" prefixed CSS attribute. Related to this, let us generate DOM events at a set of coordinates without knowing ahead of time what the node we want to route the event to happens to be. Both of these capabilities are amazingly important for a whole set of graphical apps that Deer Park is about to make available.
- Improve Venkman's profiling output
Venkman is the most powerful tool in the professional DHTML developer's toolkit today, but it's crippled when it comes to outputting useful data from it's profiling tool. Either try harder to assign names to anonymous functions or at least make the output something that can be loaded by gprof. The current situation is amazingly painful, but since it's the only game in town, we live with it.