JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="mins" />
<span id="hm"></span>

JavaScript

$('#mins').change(function(){

    
     
     var split = $('#mins').val().split(' ')
      var GetHour =  split[0].endsWith("h");
      var Getmin =  split[1].endsWith("m");
     if(GetHour && Getmin)
     {
      alert('Yes')

     }
     else
     {
     alert('No')
     }
     
     
    var h = Math.floor( $('#mins').val() / 60);
    h = "0" + h;
    h = h.substr(h.length - 2, 2);
    var m = Math.floor( $('#mins').val() % 60);
    m = "0" + m;
    m = m.substr(m.length - 2, 2); 
    if(h>24)
    {
    
     $('#hm').html('24h 00m');
    }
      else 
    $('#hm').html(h + 'h ' +m +'m');
});