Simple Facebook feed dialog facade using facebook-jssdk ( JavaScript or CoffeeScript )

application.html

<script type="text/javascript"> 
     // Facebook API loading
     (function(d){
        var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
        if (d.getElementById(id)) {return;}
        js = d.createElement('script'); js.id = id; js.async = true;
        js.src = "//connect.facebook.net/en_US/all.js";
        ref.parentNode.insertBefore(js, ref);
      }(document));
</script>

fb-sdk.js

(function() {
  
  // Global declaration and initialization of DBAsync

  var FBAsync;

  FBAsync = {
    initFBAsync: function() {
      return FB.init({
        appId: YOUR_FACEBOOK_KEY,
        status: true,
        cookie: true,
        xfbml: true
      });
    },
    openFeedDialog: function(title, link, caption, description, image) {
      if (title == null) title = "";
      if (link == null) link = "";
      if (caption == null) caption = "";
      if (description == null) description = "";
      if (image == null) image = "";
      return FB.getLoginStatus(function(response) {
        var scope;
        scope = 'popup';
        if (response.authResponse) scope = 'dialog';
        return FB.ui({
          method: 'feed',
          name: title,
          link: link,
          picture: image,
          caption: caption,
          description: description,
          display: scope
        });
      });
    }
  };

  window.FBAsync = FBAsync;

  window.fbAsyncInit = window.FBAsync.initFBAsync;

  // Now you can open the feed dialog you whatever you want 

  FBAsync.openFeedDialog();

}).call(this);

fb-sdk.js.coffee

# Global declaration and initialization of DBAsync

FBAsync =

  initFBAsync: ->
    FB.init
      appId  : YOUR_FACEBOOK_KEY
      status : true      
      cookie : true
      xfbml  : true         

  openFeedDialog: ( title = "", link = "", caption = "", description = "", image = "") -> 
    FB.getLoginStatus (response) ->
      scope = 'popup'
      scope = 'dialog' if response.authResponse

      FB.ui 
        method: 'feed'
        name: title
        link: link
        picture: image
        caption: caption
        description: description
        display: scope

window.FBAsync = FBAsync
window.fbAsyncInit = window.FBAsync.initFBAsync


# Now you can open the feed dialog you whatever you want 

FBAsync.openFeedDialog()

how to add this to work on a click of a button?