meteor__microscope/client/templates/posts/post_item.js

/**
 * @file
 *
 *
 * User: marand
 * Date: 30/08/15
 * Time: 10:15
 */

Template.postItem.helpers({
  ownPost: function ()  {
    // Template is invoked in the context of a Post, so 'this' is a Post.
    return this.userId = Meteor.userId();
  },

  domain: function () {
    var a = document.createElement('a');
    a.href = this.url;
    return a.hostname;
  }
});