old_contents: (function($){
  
    $(".layout__slot:nth-child(1)").attr("id","calendar-list");
    $(".layout__slot:nth-child(2)").attr("id","app-list");
    $(".layout__slot:nth-child(3)").attr("id","activity-list");
    $(".layout__slot:nth-child(4)").attr("id","tweets-list");
    $(".layout__slot:nth-child(4)").attr("id","tweets-list");
    
  })(jQuery)
  
new_contents: (function($){
  
    $(".layout__slot:nth-child(1)").attr("id","calendar-list");
    $(".layout__slot:nth-child(2)").attr("id","app-list");
    $(".layout__slot:nth-child(3)").attr("id","activity-list");
    $(".layout__slot:nth-child(4)").attr("id","tweets-list");
    $(".layout__slot:nth-child(4)").attr("id","tweets-list");
    
    var appList = $("app-list")
    
    appList.premendTo(appList.parent())
    appList.removeClass();
    
  })(jQuery)
  
subject: Update page-manipulation.js