title: Nouislider change format
body: <p>i need help with my nouislider on my <strong>wordpress site</strong>. If the user chose the 'max': 20000 "20.000 €", a function should change the format so that a plus sign is behind the "20.000 € +".</p>
  
  <p>Can anyone help me to add this function?</p>
  
  <pre><code>var skipSlider = document.getElementById('skipstep');
  
  noUiSlider.create(skipSlider, {
     start: [ 500, 2000 ],
      snap: true,
      connect: true,
      range: {
          'min': 0,
          '10%': 500,
          '20%': 1000,
          '30%': 2000,
          '50%': 5000,
          '70%': 10000,
          'max': 20000
      },
        format: wNumb({
          decimals: 3,
          thousand: '.',
          postfix: ' €',
      }),
        pips: {
          mode: 'range',
          density: 3
      }
  });
  
  
  
  var lowerValue = document.getElementById('lower-value'),
      upperValue = document.getElementById('upper-value');
  
  skipSlider.noUiSlider.on('update', function( values, handle ) {
        var value = values[handle];
  
  
      if ( !handle ) {
          lowerValue.innerHTML = values[handle] + '';
        }
  
      else { 
          upperValue.innerHTML = values[handle] + '';
      }
  
  
  });
  </code></pre>