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HTML

              
                <div class="wrapper">
		<div class="bar">
		  <div class="inner-bar">
        <p class="text"><span id="count">0 </span> of <span id="max"></span> items</p>	 
		  </div>  
		</div> 
</div>

 <div class="wrapper">
    <div class="plus">Plus</div>
    <div class="minus disabled">Minus</div>
</div>






              
            
!

CSS

              
                /* COLOR VARIABLES
============================================= */
$orange: #ffa600;
$grey: #e3e3e3;
$dark: #3e3e3e;
$white: #fff;
$blue: #82d2e5;
$green:#c1d72e;



/* MIXIN
============================================= */

@mixin fade {
	-moz-transition: all 1s ease-in;
	-moz-transition: all 0.3s ease-in-out;
	-webkit-transition: all 0.3s ease-in-out;
}



/* BUTTONS 
============================================= */

%btn {
	@include fade;
	padding: 15px 10px;
	color: $white;
	cursor: pointer;
	font-size: 24px;
	width: 150px;
	margin: 5px;
	text-align: center;
	float: left;
}

/* BUTTON MIXIN 
============================================= */
@mixin  btn-background($btn-background) {
	@extend %btn;
	background-color: $btn-background;
	
	&:hover {
	  background-color: lighten($btn-background,20% );
	  color:$grey;
	}
}

.plus,
.minus {
	@include btn-background($orange);
}

.plus.disabled, 
.minus.disabled {
	@include btn-background($grey);
}


/* LAYOUT
============================================= */

.wrapper {
  position: relative;
  overflow: hidden;
  width: 480px;
  margin: 0 auto;
}

/* TEXT
============================================= */
.text {
  font-size: 18px;
  font-weight: bold;
  left:120px;
  margin: 15px 0;
  width:100%;
  text-align: center;
}


/* BAR
============================================= */

.bar {
  width:300px;
  background:$grey;
  margin: 40px 30px;
}

.inner-bar {
  overflow: hidden;
  height: 50px;
	width: 100;
}

/* ANIMATION
============================================= */

@for $i from 1% through 100% {
  
  .inner-bar[data-width="#{$i}"] {
   @include fade;

  
background: $orange; /* Old browsers */
background: -moz-linear-gradient(left, $orange 0%, $orange #{$i}, $grey #{$i}, $grey 100%); /* FF3.6+ */
  
background: -webkit-gradient(linear, left top, right top, color-stop(0%,$orange), color-stop(#{$i},$orange), color-stop(#{$i},$grey), color-stop(100%,$grey)); /* Chrome,Safari4+ */

background: -webkit-linear-gradient(left, $orange 0%,$orange #{$i},$grey #{$i},$grey 100%); /* Chrome10+,Safari5.1+ */

background: -o-linear-gradient(left, $orange 0%,$orange #{$i},$grey #{$i},$grey 100%); /* Opera 11.10+ */

background: -ms-linear-gradient(left, $orange 0%,$orange #{$i},$grey #{$i},$grey 100%); /* IE10+ */

background: linear-gradient(to right, $orange 0%,$orange #{$i},$grey #{$i},$grey 100%); /* W3C */

filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='$orange', endColorstr='$grey',GradientType=1 ); /* IE6-9 */
  

    .text {
  
     
       
      color: $dark; //fallback
      
      background: -webkit-linear-gradient(left, $white 0%,$white 
         #{$i},$dark #{$i},$dark 100%); /* Chrome10+,Safari5.1+ */

       -webkit-background-clip: text;
       -webkit-text-fill-color: transparent;
    }

  }
}





              
            
!

JS

              
                $(document).ready(function () {
  
  var counter = document.getElementById('count');
  var max = document.getElementById('max');
  
  var count = 0;
  var maxCount = 20;

  max.innerHTML = maxCount;

  // Percentage function
  var percentage =  function () {
    var percent = (count / maxCount ) * 100;
    var width = parseInt (percent); 
    $(".inner-bar").attr('data-width', width +'%');
  }

  // Active Buttons functions
  var minus = function () {
    if ( count <= 0) {
    $(".minus").addClass( "disabled" );

     } else {
    $(".minus").removeClass( "disabled" );
   }
  }

  var plus = function () {
    if ( count >= maxCount) {
    $(".plus").addClass( "disabled" );

    } else {
    $(".plus").removeClass( "disabled" );
  }

  }

  $(".plus").click(function () { 
    if (count < maxCount) {
      count ++;
      counter.innerHTML = count;
      percentage (); 
      plus ();
      minus ();
    }    
  })
  
  $(".minus").click(function () {
    if ( count > 0) {
      count --;
      counter.innerHTML = count;
      percentage ();   
      minus ();
      plus ();
    } 
  }); 
  
  

   
  
  
});
 




              
            
!
999px

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