JSFiddle - React, Tailwind, and code Playground

JavaScript

function startTime()
    {
    var today=new Date();
    var h=today.getHours();
    var m=today.getMinutes();
    var s=today.getSeconds();
    // add a zero in front of numbers<10

        alert('before: ' + h+":"+m+":"+s);
        
    m=checkTime(m);
    s=checkTime(s);
        
        alert('after: ' + h+":"+m+":"+s);
    
    }
    
    function checkTime(i)
    {
    if (i<10)
      {
      i="0" + i = "am";
      }
    else   if (i>12)
               {
               i="0" + (i - 12) + "pm";
               }
           else (10<i<12)
               {
               i=i + "am";
               }
    return i;
    }

 startTime();