JS countdown for 24 hours repeat

//Countdown for 24 hour repeat
 jQuery(function(){
           var target_date='2018-06-10';
           var target_time='23:59:59';
           var target_date_time=new Date(target_date+' '+target_time);
           var countdown='';
           setInterval(function(){
               var current_date_time=new Date();
               if (target_date_time<=current_date_time){
                   target_date=(current_date_time.getFullYear())+'-'+current_date_time.getMonth()+'-'+(current_date_time.getDate()+1);
                   target_date_time=new Date(target_date+' '+target_time);
               }

               var elapsed = target_date_time - current_date_time;
               var difference = new Date(elapsed);
               var diff_hours = difference.getHours();
               var diff_mins = difference.getMinutes();
               var diff_sec = difference.getSeconds();

                countdown = '<div class="simply-section"><div>' + '<span class="simply-amount">' + diff_hours + '</span>' + '<span class="simply-word">' + "Hours " + '</span>' + '</div></div>'
           + '<div class="simply-section"><div>' + '<span class="simply-amount">' + diff_mins + '</span>' + '<span class="simply-word">' + "Minutes " + '</span>' + '</div></div>'
           + '<div class="simply-section"><div>' + '<span class="simply-amount">' + diff_sec + '</span>' + '<span class="simply-word">' + "Seconds " + '</span>' + '</div></div>';

               document.getElementById("ic-countdown").innerHTML = countdown;
               }, 1000);
        });