<div class="wrapper">
  
  
  <div class="range-box">        
    <div title="Decrease" class="control-minus">-</div>    
    <input id="month-price" type="range" min="2" max="18" value="10">    
    <div class="current-value">€ <span>10</span></div>
    <span class="legend-min">2</span>
    <span class="legend-max">18</span>
    <div title="increase" class="control-plus">+</div>
  </div>
  
  <p>NOTES:</p>
  <ul>
    <li>Step width (tooltip position) is not exact by ~1px, due to pixel rounding (I presume). I had to use a subpixel correction of 0.4.</li>    
    <li>To make the thumb look centerd in firs/last value, I use a scaled up circle. This trick doesn't work on IE, as the circle gets cut. Because of that the tooltip position in IE is less exact. 
    <li>Ruler is buggy</li>
  </ul>
  
  
</div>

$thumb-radius: 7px;       // Actual size is $thumb-radius*$thumb-radius-scale
$thumb-radius-scale: 3;   // We do this to make the thumb overlay the sides of the track
$theme-color: #009fdf;
$theme-color-dark: #545454;
$track-height: 5px;
$border-radius: 3px;
$bottom-border: 4px;
$slider-padding: 15px;
$rule-height: 6px;
$rule-color: #cccccc;
$side-control-height: 35px;

@mixin thumb {
  position: relative;
  height: $thumb-radius;
  width: $thumb-radius;
  // Trick to make it overflow on the sides
  transform: scale($thumb-radius-scale);
  margin-top: -$thumb-radius/2 +$track-height/2;
  border-radius: 500px;
  background: $theme-color;  
  border: 0;
  cursor: pointer;  
  z-index: 2;
}
@mixin track {
  background-color: $theme-color-dark;
  height: $track-height;
  border-radius: $border-radius;
}


input[type='range'] {  
  width: 100%;  
  box-sizing: border-box;  
  -webkit-appearance: none;  
  height: $slider-padding*2 + $track-height;  // IE's thumb gets cut
  background: transparent;
  position: relative;
  cursor: pointer;    
  background: 
    linear-gradient(90deg, $rule-color 1px, rgba(238, 238, 238, 0) 1px) repeat-x content-box, 
    linear-gradient(90deg, $rule-color 1px, rgba(238, 238, 238, 0) 1px) repeat-x content-box;  
  background-size: 25% $rule-height, calc(100% - 5px) $rule-height*2;
  background-position: 1px 30%, 1px 20%;
  padding: 0 $slider-padding;  
  overflow: visible;

  
  /*******    The Thumb    *******/
  &::-webkit-slider-thumb {
    @include thumb();
    -webkit-appearance: none;        
  }
  &::-moz-range-thumb {
     @include thumb();
  }
  &::-ms-thumb {
    @include thumb();
    // BUG: In IE the scale*3 gets hidden under the padding (facepalm)
    transform: none;
    margin-top: -2px;    
    height: $thumb-radius*$thumb-radius-scale;
    width: $thumb-radius*$thumb-radius-scale;
    border-radius: $thumb-radius*$thumb-radius-scale;
  }
  
  
  /*******    The Track    *******/
  &::-webkit-slider-runnable-track {
    @include track();
    // transform: scaleX(0.9); 
    
  }
  &::-moz-range-track {
    @include track();
  }
  &::-ms-track {    
    background: transparent;
    border-color: transparent;    
    color: transparent;    
  }
  &::-ms-fill-lower {    
    @include track();
    background-color: $theme-color;
  }
  &::-ms-fill-upper {    
    @include track();
  }
  
  &:focus {
    outline: none; 
  }
}


@mixin legend-text() {  
  font-family: Helvetica, Arial, sans-serif;
  font-weight: bold;
  font-size: 11px;
  color: $rule-color;    
  margin-top: - $slider-padding - $bottom-border + 1px;  
}


/*******    The wrapper for the range input    *******/
.range-box {  
  position: relative;    
  background-color: #f4f4f4;
  padding: 0; 
  margin: 0 $side-control-height;  
  overflow: visible;
  &:after {
    display: block;
    position: absolute;
    bottom: 0;
    left: 0;
    content:"";
    width: 100%;
    background-color: #b3b3b3;
    height: $bottom-border;
  }
  
  .legend-min{
    @include legend-text();
    float: left;
    margin-left: $slider-padding - 2px;
  }
  .legend-max{
    @include legend-text();
    float: right;
    margin-right: $slider-padding - 4px;
  }
}


/*******    Extra controls on the side    *******/
@mixin side-control() {
  // box-sizing: border-box;
  position: absolute;
  top: 0;
  background-color: #009fdf;  
  color: white;
  width: $side-control-height;
  text-align: center;
  cursor: pointer;
  height: $side-control-height;
  border-bottom: $bottom-border solid #0073a1;
  z-index: 1;
  font-weight: bold;
  font-size: $side-control-height;
  line-height: $side-control-height;  
  &:hover {
    top: 1px;
    background-color: #00adf2;
    border-bottom-width: $bottom-border - 1px;
  }
  &:active {
    top: 3px;
    background-color: #009fdf;      
    border-bottom-width: 2px;    
  }
}

.no-selection {
  -webkit-touch-callout: none;
  -webkit-user-select: none;    
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.control-minus {
  // display: inline-block;
  @include side-control();  
  left: -$side-control-height;  
  line-height: $side-control-height - $bottom-border;  
  border-top-left-radius: $border-radius;
  border-bottom-left-radius: $border-radius;
  @extend .no-selection;    
}
.control-plus {
  @include side-control();  
  right: -$side-control-height;
  border-top-right-radius: $border-radius;
  border-bottom-right-radius: $border-radius;  
  @extend .no-selection;  
}


/*******    Value tooltip    *******/
.current-value {
    visibility: hidden;
    background: $theme-color;
    border-radius: $border-radius;    
    position: absolute;
    top: -48px;
    padding: 12px 18px;
    font-family: Helvetica, Arial, sans-serif;
    font-size: 20px;
    font-weight: bold;
    color: white;
    line-height: 22px;
    white-space: nowrap;
    transition: left 0.045s linear;
    &:after{ 
      content: "";
      width: 0;
      height: 0;
      position: absolute;
      left: 50%;
      border-left: 6px solid transparent;
      border-right: 6px solid transparent;
      border-top: 6px solid $theme-color;
      margin-top: -6px;
      margin-left: -6px;
      bottom: -5px;
    }
}

// Some style for the wrapper
.wrapper {  
  width: 50%;
  margin: 3em auto;  
  padding: 100px;
  background-color: $theme-color-dark;
  color: white;
}

var range = document.getElementById("month-price");
var minusButton = document.querySelector(".control-minus");
var plusButton = document.querySelector(".control-plus");
var tooltip = document.querySelector(".current-value");
var steps = 16, padding = 15;
// There's a small error due to pixel truncating in Chrome
var subpixelCorrection = 0.4;

// All browsers but IE
range.addEventListener("input", function(evt) {  
  updateTooltip ();
}, false);
// IE10
range.addEventListener("change", function(evt) {  
  updateTooltip ();
}, false);

function updateTooltip () {
  tooltip.firstElementChild.textContent = range.value;
  
  var startPosition = - (tooltip.clientWidth)/2 + padding + 4;
  var stepWidth = (range.getBoundingClientRect().width - padding*2)/steps - subpixelCorrection;  
  var currentStep =  range.value - range.min;
  
  // Reposition tooltip on top of the thumb
  tooltip.style.visibility = "visible";
  tooltip.style.left = Math.round(stepWidth*currentStep + startPosition) + "px";
    
}

minusButton.addEventListener("click", function() {
  range.stepDown();
  updateTooltip ();
}, false);

plusButton.addEventListener("click", function() {
  range.stepUp();
  updateTooltip ();
}, false);