JsDuck tag for Deferred methods

Posted:  October 12th, 2012 by:  guidone comments:  0

I started working with the awesome JSDuck to document my projects (do you like the doc system on Sencha Touch?) and, since I’m a great fan of Deferred object, I saw the lack of support for this kind of pattern.
Setting the @return tag with something like @return {jQuery.Deferred} is not enough since the returned value that matters is that passed through the .resolve() method of the deferred object.

Would be nice to mark a method as “deferred” and use the @return tag to document the value passed with .resolve(), keeping in mind that the actual value returned by the function is a just e promise.

Luckly JsDuck supports custom tags:

require "jsduck/meta_tag"
module JsDuck::Tag
   # Implementation of @deferred tag
   class Deferred < JsDuck::MetaTag
      def initialize
         @name = "deferred"
         @key = :deferred
         @signature = {:long => "deferred", :short => "DEF"}
         @boolean = true

Put this somewhere, for example ‘jsduck/deferred.rb’ and remember to call JsDuck with the param “–meta-tags=jsduck/deferred.rb”.

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