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HTML

              
                <div class="asset-calculator || container || js-asset-calculator">
    <div class="row">
        <div class="asset-calculator__column ||col-12 col-md-5 d-flex flex-column align-items-center">
            <label class="d-none" for="year-select">Year and multiplier</label>
            <select class="asset-calculator__year-figures || js-asset-calculator-multiplier" name="year" id="year-select">
                <option value="1.1203">1 Year</option>
                <option value="1.2406">2 Year</option>
                <option value="1.3609">3 Year</option>
                <option value="1.4812">4 Year</option>
                <option value="1.6015">5 Year</option>
                <option value="1.7218">6 Year</option>
                <option value="1.8421">7 Year</option>
                <option value="1.9624">8 Year</option>
                <option value="2.0827">9 Year</option>
                <option value="2.2030">10 Year</option>
            </select>
            <h4 class="asset-calculator__light-text">If you invested</h4>
            <label class="d-none" for="value">Value</label>
            <input class="asset-calculator__value-input || js-asset-calculator-value-input" type="number" id="value" min="10000" max="250000">
        </div>
        <div class="asset-calculator__column || col-12 col-md-2 d-flex justify-content-center">
            <div class="asset-calculator__range-range">
                <div class="asset-calculator__range-container || js-asset-calculator-range-container" data-min="10000" data-max="250000">
                    <div class="asset-calculator__range-knob || js-asset-calculator-knob">
                        <div class="asset-calculator__range-knob__handle || js-asset-calculator-knob-handle"></div>
                    </div>
                </div>
            </div>
        </div>
        <div class="asset-calculator__column || col-12 col-md-5 d-flex flex-column align-items-center">
            <h4 class="asset-calculator__light-text">you would have</h4>
            <h4>
                <span>£</span>
                <span class="total || js-asset-calculator-total"></span>
                <span class="asset-calculator__light-text">today</span>
            </h4>
        </div>
    </div>
</div>

              
            
!

CSS

              
                * {
  position: relative;
  box-sizing: border-box;
}

.asset-calculator {
  .row {
    &:last-of-type {
      margin-top: 49px;
      text-align: center;

      p {
        font-size: 1em;
      }
    }
  }
}

.asset-calculator__light-text {
  opacity: 0.6;
}

.asset-calculator__range-range {
  position: relative;
  display: flex;
  justify-content: center;
  width: 40px;
  height: 422px;
}

.asset-calculator__range-container {
  background-color: black;
  width: 2px;
  height: 100%;
  position: relative;
}

.asset-calculator__range-knob {
  position: absolute;
  top: 0;
  left: 50%;
}

.asset-calculator__range-knob__handle {
  background-color: orange;
  width: 37px;
  height: 37px;
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 7px solid white;
  display: flex;
  justify-content: center;
  align-items: center;

  img {
    max-height: 15px;
    width: auto;
  }
}

.asset-calculator__value-input {
  -webkit-appearance: textfield;
  border: none;
  background-color: transparent;
  border-bottom: 3px dashed orange;
}
              
            
!

JS

              
                const calculator = document.querySelector('.js-asset-calculator')
const total = calculator.querySelector('.js-asset-calculator-total')
const multiplier = calculator.querySelector('.js-asset-calculator-multiplier')
const input = calculator.querySelector('.js-asset-calculator-value-input')
const rangeContainer = calculator.querySelector('.js-asset-calculator-range-container')
const rangeContainerHeight = rangeContainer.getBoundingClientRect().height
const knob = calculator.querySelector('.js-asset-calculator-knob')
const knobHandle = calculator.querySelector('.js-asset-calculator-knob-handle')
let containerY = rangeContainer.getBoundingClientRect().top
let minValue = rangeContainer.getAttribute('data-min')
let maxValue = rangeContainer.getAttribute('data-max')
let interpValue = gsap.utils.interpolate(minValue, maxValue)
let clampValue = gsap.utils.clamp(minValue, maxValue)
let normalizeValue = gsap.utils.normalize(minValue, maxValue)
let newMultiplier = multiplier.value
let typingTimer
let doneTypingInterval = 2000

multiplier.addEventListener('change', () => {
  newMultiplier = multiplier.value
  total.innerHTML = Math.round(input.value * newMultiplier)
})

let draggable = new Draggable(knob, {
  type: 'y',
  bounds: rangeContainer,
  onDrag: onDrag,
})
onDrag.call(draggable)

function onDrag() {
  let ratio = this.y / this.maxY
  total.innerHTML = Math.round(clampValue(interpValue(ratio)) * newMultiplier)
  input.value = Math.round(clampValue(interpValue(ratio)))
}

function init(value) {
  let newValue = normalizeValue(150000)
  gsap.set(knob, { y: rangeContainerHeight * newValue })
  total.innerHTML = Math.round(clampValue(interpValue(newValue)) * newMultiplier)
  input.value = Math.round(clampValue(interpValue(newValue)))
}
init()

knobHandle.addEventListener('pointerdown', () => {
  gsap.to(knobHandle, { scale: 1.5 })
})

knobHandle.addEventListener('pointerup', () => {
  gsap.to(knobHandle, { scale: 1 })
})

rangeContainer.addEventListener('mouseleave', () => {
  gsap.to(knobHandle, { scale: 1 })
})

input.addEventListener('keyup', () => {
  clearTimeout(typingTimer)
  typingTimer = setTimeout(doneTyping, doneTypingInterval)
})

input.addEventListener('keydown', () => {
  clearTimeout(typingTimer)
})

function doneTyping() {
  let typedValue = normalizeValue(input.value)
  console.log(typedValue)
  gsap.to(knob, { y: rangeContainerHeight * typedValue })
  total.innerHTML = Math.round(clampValue(interpValue(typedValue)) * newMultiplier)
  input.value = Math.round(clampValue(interpValue(typedValue)))
}
              
            
!
999px

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