text: $(document).ready(function () {
      $('.shiny-material-side-nav-tab').first().addClass('active');
  
      var first_side_nav_tab_id = $('.shiny-material-side-nav-tab').first().attr("id");
  
      var first_side_nav_tab_content_id = $('.shiny-material-side-nav-tab')
          .first()
          .attr("id")
          .replace("_tab_id", "");
  
      var first_side_nav_tab_content_found = $('.shiny-material-side-nav-tab-content')
          .first()
          .attr('id');
  
      if (first_side_nav_tab_content_id != first_side_nav_tab_content_found) {
          alert("SHINYMATERIAL ERROR [side-nav tabs]\n\nTab content code for the first tab must be located prior to tab content code for all other tabs.\n\nFirst tab found (" + first_side_nav_tab_id.replace("_tab_id", "") + ") does not match first tab content found (" + first_side_nav_tab_content_found + ").\n\nPlease rearrange the UI code.")
  
          $("body").empty();
      } else {
          
        $(document).on('shiny:sessioninitialized', function() {  
          
          function get_side_nav_tabs_info() {
            
          var side_nav_tabs_info = [];
            
              for (var i = 0; i < $('.shiny-material-side-nav-tab').length; i++) { 
                
                side_nav_tabs_info.push({
                id: $('.shiny-material-side-nav-tab')[i].id.slice(0, -7),
                active: $('.shiny-material-side-nav-tab').eq(i).hasClass("active")
                });
                
              }
              
              Shiny.onInputChange("side_nav_tab_info", JSON.stringify(side_nav_tabs_info));
          }
          
          get_side_nav_tabs_info();
          
         $("#side_nav_tabs_click_info").click(function() {
             get_side_nav_tabs_info();
         });
        });
  
          $('#' + first_side_nav_tab_id).children('a').trigger('click');
      }
  })
  