[wp-trac] [WordPress Trac] #21170: JavaScript actions and filters

[WordPress Trac]

#21170: JavaScript actions and filters
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 Reporter:  koopersmith     |       Owner:  koopersmith
     Type:  task (blessed)  |      Status:  new
 Priority:  normal          |   Milestone:  3.5
Component:  General         |     Version:  3.4
 Severity:  normal          |  Resolution:
 Keywords:                  |
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Comment (by CaptainN):

 SignalsLite.js now has every feature in the ticket (and then some, like
 safe dispatching, addToTop, once, eachReturn handler for filtering) -
 including priorities, namespaces and a way to cancel dispatch. And, it's
 incredibly fast (crazy fast!). I did end up moving the safe dispatcher out
 to it's own sub class (SignalDispatcher), because it was big, relies on
 the DOM, and is frankly, not the fasted thing in the world (it's worth it
 some cases! but maybe not every case). In its place is a simple trigger
 method, which will just error out (like jQuery) if there's an error in a
 listener.

 Anyway, now that that base is done, maybe I'll take a stab at putting the
 actual WordPress part around it - if there is any interest (I'm not sure
 how far along any other implementations are).

 Here's what the API might look like with Signals - you could keep things
 string based if you wanted, and still expose the Signal feature set (which
 I think has some advantages compared with period based namespacing, or the
 full set of add methods you get with Signal priorities). Here's a quick
 example of what could be done:

 {{{
 // add hook with chaining
 // everything after addAction() is implemented and unit tested in
 SignalsLite.js
 $wp.hooks.addAction( "actionname" )
     .ns( "myNamespace" )
         .add( function() {} );

 // additional adds can be property based (they don't have to be though)
 $wp.hooks.actionname.myNamespace.add( function() {} );

 // here's what priorities look like
 $wp.hooks.addAction( "actionname" )
     .priority( 10 )
         .addToTop( function() {} );
 }}}

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Ticket URL: <http://core.trac.wordpress.org/ticket/21170#comment:37>
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