How to make a dynamic progress bar with jQuery

Question

I'm trying to do something so trivial and simple but yet been bumping my head for well an hour. I'm trying to make a progress bar move forward by adding 10 every time user clicks on button but only the first click works. I think I need a second pair of eyes because I'm not seeing where I'm wrong. Obviously I'm wrong somewhere.

I have reproduced the use case here :

$(document).ready(function() {
     $('#increaseMeter').click(function(e){
            e.preventDefault();
                            //get meter progress number
                             var progress = $('.barmeter').attr('meterprogress');
                           
                             //add 10 to the meter
                             var mathnum =progress;
                             mathnum += parseInt(progress)+parseFloat(10);
                             
                            //format new classes depending on progress number
                             if(progress <60){
                             var newclass = 'progress-bar-warning';
                             }else{
                             var newclass = 'progress-bar-success';    
                             }
                             //update meter progress attribute
                             $('.barmeter').attr('meterprogress='+mathnum);
                            
                             //add class to meter
                             $('.barmeter').addClass(newclass);
                             
                             //change style width
                             $('.barmeter').attr('style', 'width:'+mathnum+'%');
                             
                             //change aria value
                             $('.barmeter').attr('aria-valuenow', mathnum);
                             
                             //display new text
                             $('.metertext').html(mathnum+'%');
     });
});

   <!-- bootstrap css stylesheets -->
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
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        <!-- bootstrap javascript, jquery -->
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<p>
 <br><br>
  <div class="container">
<button class="btn btn-lg btn-primary" 
        id="increaseMeter">
  Increase Meter
    </button>
</p> <br><br>



 <div class="col-md-6">
<div style="" class="salesmeter"> 
                       Meter Probability
        <div class="progress">
              <div class="progress-bar barmeter" 
                        meterprogress="0"
                        role="progressbar" 
                        aria-valuenow="0"
                        aria-valuemin="0" 
                        aria-valuemax="100">
                        <span class="metertext"></span>
                        </div> </div></div>

Answer 1

$(document).ready(function() {
     $('#increaseMeter').click(function(e){
            e.preventDefault();

                            //get meter progress number
                             var progress = parseInt($('.barmeter').attr('meterprogress'));

                             //add 10 to the meter
                             var mathnum  =  progress + parseFloat(10);

                            //format new classes depending on progress number
                             if(progress <60){
                                //add class to meter
                             $('.barmeter').addClass('progress-bar-warning');

                             }else{
                               $('.barmeter').addClass('progress-bar-success').removeClass('progress-bar-warning');

                             }
                             //update meter progress attribute
                             $('.barmeter').attr('meterprogress' , mathnum);


                             //change style width
                             $('.barmeter').attr('style', 'width:'+mathnum+'%');

                             //change aria value
                             $('.barmeter').attr('aria-valuenow', mathnum);

                             //display new text
                             $('.metertext').html(mathnum+'%');
     });
});

https://codepen.io/vommbat/pen/LBBpRz/