code: function define() {
      var defaults = this.defaults
        , data = this.data
        , load = data.load || defaults.load
        , href = this.href
        , def = [];
  
      //
      // Check what social media to load, if none provided load defaults in `load`.
      //
      Object.keys(load).forEach(function checkLoad(key) {
        if (!load[key] || !(key in href)) return;
        def.push(href[key]);
      });
  
      this.queue.enlist('loader', { plain: def });
      return this;
    }
docs: Define what external JS script should be loaded.
  
  @return {Pagelet}
  @api private