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HTML

            
              <h1>Scalable <b>3D</b> Range Sliders</h1>

<main class="perspective" id="first-bar">
  <section class="bar">
    <div class="bar-face back percentage"></div>
    <div class="bar-face floor percentage"></div>
    <div class="bar-face roof percentage"></div>
    <div class="bar-face front percentage"></div>
  </section>
  <input class="bar-input" type="range" min="0" max="101" value="64" />
</main>
<p>Simple Range</p>


<main class="perspective" id="second-bar">
<section class="bar">
    <div class="bar-face back percentage"></div>
    <div class="bar-face floor percentage"></div>
    <div class="bar-face roof percentage"></div>
    <div class="bar-face front percentage"></div>
  </section>
<input class="bar-input" type="range" min="0" max="101" value="37" />
</main>
<p>Patterned Range</p>


<main class="perspective" id="third-bar">
<section class="bar">
    <div class="bar-face back percentage"></div>
    <div class="bar-face floor percentage"></div>
    <div class="bar-face roof percentage"></div>
    <div class="bar-face front percentage"></div>
     <div class="indicator">89%</div>
  </section>
<input class="bar-input" type="range" min="0" max="100" value="89" />
</main>
<p class="third-bar-p">Gradient Range with Indicator</p>
!

CSS

            
              /*
Thanks to the following for help:
https://tympanus.net/codrops/2015/09/30/shaded-progress-bars-css-sass-excercise/
*/
@import url('https://fonts.googleapis.com/css?family=Nunito:400,900');

$highlight: #4D5075;

$height1: 7vh;
$length1: 55vh;
$bg-bar1: rgba(white, 0.5);
$fill-bar1:rgba(#954169, 0.6);

$height2: 10vh;
$length2: 40vh;
$bg-bar2: rgba(#3C4B84, 0.5);
$fill-bar21: #867292;
$fill-bar2: #C8D4FA;

$height3: 8vh;
$length3: 42vh;
$bg-bar3: rgba(#E89AAD, 0.7);
$fill-bar31: rgba(#F5EFC8, 0.5);
$fill-bar3: #ec0071;

* {
  box-sizing: border-box;
}

body,
html {
  font-family: "Nunito", sans-serif;
  background: linear-gradient(0deg, #EEEFED, #F9E3E9);
  margin: 0;
  padding: 0;
  color: $highlight;
  font-weight: 300;
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 7vh 15vw 0vh 15vw;
}

h1 {
  text-align: center;
  margin: 0 0 10vh 0;
  font-size: 7vh;
  font-weight: 500;
  text-shadow: 0px -15px 70px rgba($highlight, 0.6);
}

h1 b {
  font-weight: 900;
}

p {
  text-align: center;
  font-size: 1.3rem;
  text-shadow: 10px 5px 25px rgba($highlight, 0.6);
  margin-bottom: 8vh;
}

.third-bar-p {
  margin-top: 7vh;
}

.perspective {
  perspective: 70vh;
  text-align: center;
  perspective-origin: 50% 50%;
  position: relative;
  transition: transform 0.3s ease;
  &:hover {
    transform: scale(1.04);
  }
}

.bar-input {
  position: absolute;
  height: 100%;
  left: 0;
  right: 0;
  margin: auto;
  opacity: 0;
}

#first-bar .bar-input {
  width: $length1;
}

#second-bar .bar-input {
  width: $length2;
}

#third-bar .bar-input {
  width: $length3;
}

.bar {
  display: inline-block;
  position: relative;
  transform: rotateX(55deg);
  transform-style: preserve-3d;
  .bar-face {
    display: inline-block;
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    transform-origin: 50% 100%;

    &.front {
      transform: rotateX(-90deg);
    }

    &.percentage:before {
      height: 100%;
      content: "";
      display: block;
      position: absolute;
      bottom: 0;
      margin: 0;
    }
  }
}

@mixin build-skin($color) {
  &.floor {
    box-shadow: 0 1.3em 1.2em -0.4em rgba(0,0, 70, 0.25),
      0 -2em 15em 0.5em rgba($highlight, 1), 0 -0.75em 25em 10em rgba(white, 0.4);
  }

  &.percentage:before {
    box-shadow: 0 1.6em 7em -0.3em rgba($color, 0.5);
  }
}

#first-bar .bar {
  width: $length1;
  height: $height1;
  .bar-face {
    background: $bg-bar1;
    @include build-skin($fill-bar1);

    &.roof {
      transform: translateZ($height1);
    }

    &.back {
      transform: rotateX(-90deg) translateZ(-$height1);
    }

    &.percentage:before {
      background-color: $fill-bar1;
    }
  }
}

#second-bar .bar {
  width: $length2;
  height: $height2;
  .bar-face {
    @include build-skin($fill-bar2);
    background: $bg-bar2;
    background-image: linear-gradient(90deg, rgba($fill-bar21, 0.5), rgba($bg-bar2, 0.1)),url('https://zephyo.github.io/22Days/code/5/graphics/stars.svg'),
      url('https://zephyo.github.io/22Days/code/5/graphics/stars2.svg');
    background-repeat: repeat repeat;
    &.roof {
      transform: translateZ($height2);
    }

    &.back {
      transform: rotateX(-90deg) translateZ(-$height2);
    }

    &.percentage:before {
       background-image: url('https://zephyo.github.io/22Days/code/5/graphics/sky.png');
       opacity: 0.9;
    }
  }
}

$indicator-size: 8vh;

#third-bar .bar {
  width: $length3;
  height: $height3;
  .bar-face {
    @include build-skin($fill-bar3);
    background: $bg-bar3;

    &.roof {
      transform: translateZ($height3);
    }

    &.back {
      transform: rotateX(-90deg) translateZ(-$height3);
    }

    &.percentage:before {
      background: linear-gradient(90deg, $fill-bar31,$fill-bar3);
    }
  }

  .indicator {
    box-shadow: 0px 15px 35px rgba($fill-bar3, 0.3);
    background: $fill-bar3;
    width: $indicator-size;
    height: $indicator-size;
    color: white;
    transform: translateY($height3 * 1.2);
    text-align: center;
    font-size: 2.5vh;
    font-weight: 900;
    line-height: $indicator-size;
    &:before {
      content: "";
      position: absolute;
      background: $fill-bar3;
      left: 0;
      right: 0;
      margin: auto;
      top: -6px;
      width: $indicator-size/2;
      height: $indicator-size/2;
      z-index: -1;
      transform: rotate(45deg);
    }
  }
}
!

JS

            
              function initInputs() {
  var allInputs = document.body.querySelectorAll(".bar-input");

  for (var i = 0; i < allInputs.length; i++) {
    var input = allInputs[i];
    var barId = input.parentNode.id;
    var styleEl = document.head.appendChild(document.createElement("style"));

    if (i == allInputs.length - 1) {
      //set indicator
      var indicator=input.parentNode.querySelector('.bar .indicator');
      setBarIndicator(barId, input, styleEl, indicator);
      input.oninput = setBarIndicator.bind(this, barId, input, styleEl, indicator);
      input.onchange = setBarIndicator.bind(this, barId, input, styleEl, indicator);
    } else {
      setBar(barId, input, styleEl);
      input.oninput = setBar.bind(this, barId, input, styleEl);
      input.onchange = setBar.bind(this, barId, input, styleEl);
    }
  }
}

function setBar(barId, input, styleEl) {
  styleEl.innerHTML =
    "#" + barId + " .bar-face.percentage:before {width:" + input.value + "%;}";
}

function setBarIndicator(barId, input, styleEl, indicatorEl) {
  styleEl.innerHTML =
    "#" + barId + " .bar-face.percentage:before {width:" + input.value + "%;}";
  indicatorEl.style.marginLeft = (input.value - 10) + '%';
  indicatorEl.textContent = input.value + '%';
}

initInputs();
!
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