Opal: wrap jquery native methods at runtime with metaprogramming

jquery.rb

module Jquery

  module WrapMethods

    def WrapMethods.included(base)
      # i can't use extend on opal. why?
      class << base

        def wrap_method(meth)

          define_method(meth) do |*args|
            `
              var sel=jQuery(this.selector);
              sel[meth].apply(sel,args);
             `
            self
          end

        end

        def wrap_methods(*methods)
          methods.each { |method| wrap_method(method)  }
        end

      end
    end

  end

  class Base

    include WrapMethods

    def initialize(selector)
      @selector=selector
    end

    wrap_methods :html,:before,:after,:wrap

  end

  def Jquery.sel(selector)
    Base.new(selector)
  end

end



Document.ready? do
  Jquery.sel("h1").html("ciao").before("<p>ciao</p>").after("<p>ciao2</p>")
end