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Gradient Range Slider

A Pen By Eric Grucza

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HTML

            
              <input type="range" min="-100" max="0" value="0" class="range blue"/>
!

CSS

            
              body, html {
  background-color: #1d1c25;
  margin: 0;
  padding: 0;
}

.range {
  -webkit-appearance: none;
  -moz-appearance: none;
  position: absolute;
  left: 50%;
  top: 50%;
  width: 200px;
  margin-top: 10px;
  transform: translate(-50%, -50%);
}

input[type=range]::-webkit-slider-runnable-track {
  -webkit-appearance: none;
  background: rgba(59,173,227,1);
  background: -moz-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: -webkit-gradient(left bottom, right top, color-stop(0%, rgba(59,173,227,1)), color-stop(25%, rgba(87,111,230,1)), color-stop(51%, rgba(152,68,183,1)), color-stop(100%, rgba(255,53,127,1)));
  background: -webkit-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: -o-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: -ms-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3bade3 ', endColorstr='#ff357f ', GradientType=1 );
  height: 2px;
}

input[type=range]:focus {
  outline: none;
}

input[type=range]::-moz-range-track {
  -moz-appearance: none;
  background: rgba(59,173,227,1);
  background: -moz-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: -webkit-gradient(left bottom, right top, color-stop(0%, rgba(59,173,227,1)), color-stop(25%, rgba(87,111,230,1)), color-stop(51%, rgba(152,68,183,1)), color-stop(100%, rgba(255,53,127,1)));
  background: -webkit-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: -o-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: -ms-linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  background: linear-gradient(45deg, rgba(59,173,227,1) 0%, rgba(87,111,230,1) 25%, rgba(152,68,183,1) 51%, rgba(255,53,127,1) 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3bade3 ', endColorstr='#ff357f ', GradientType=1 );
  height: 2px;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  border: 2px solid;
  border-radius: 50%;
  height: 25px;
  width: 25px;
  max-width: 80px;
  position: relative;
  bottom: 11px;
  background-color: #1d1c25;
  cursor: -webkit-grab;

  -webkit-transition: border 1000ms ease;
  transition: border 1000ms ease;
}

input[type=range]::-moz-range-thumb {
  -moz-appearance: none;
  border: 2px solid;
  border-radius: 50%;
  height: 25px;
  width: 25px;
  max-width: 80px;
  position: relative;
  bottom: 11px;
  background-color: #1d1c25;
  cursor: -moz-grab;
  -moz-transition: border 1000ms ease;
  transition: border 1000ms ease;
}



.range.blue::-webkit-slider-thumb {
   border-color: rgb(59,173,227);
}

.range.ltpurple::-webkit-slider-thumb {
   border-color: rgb(87,111,230);
}

.range.purple::-webkit-slider-thumb {
   border-color: rgb(152,68,183);
}

.range.pink::-webkit-slider-thumb {
   border-color: rgb(255,53,127);
}

.range.blue::-moz-range-thumb {
   border-color: rgb(59,173,227);
}

.range.ltpurple::-moz-range-thumb {
   border-color: rgb(87,111,230);
}

.range.purple::-moz-range-thumb {
   border-color: rgb(152,68,183);
}

.range.pink::-moz-range-thumb {
   border-color: rgb(255,53,127);
}

input[type=range]::-webkit-slider-thumb:active {
  cursor: -webkit-grabbing;
}

input[type=range]::-moz-range-thumb:active {
  cursor: -moz-grabbing;
}
!

JS

            
              var inputRange = document.getElementsByClassName('range')[0],
    maxValue = 100, // the higher the smoother when dragging
    speed = 5,
    currValue, rafID;

// set min/max value
inputRange.min = 0;
inputRange.max = maxValue;

// listen for unlock
function unlockStartHandler() {
    // clear raf if trying again
    window.cancelAnimationFrame(rafID);
    
    // set to desired value
    currValue = +this.value;
}

function unlockEndHandler() {
    
    // store current value
    currValue = +this.value;
    
    // determine if we have reached success or not
    if(currValue >= maxValue) {
        successHandler();
    }
    else {
        rafID = window.requestAnimationFrame(animateHandler);
    }
}

// handle range animation
function animateHandler() {

    // calculate gradient transition
    var transX = currValue - maxValue;
    
    // update input range
    inputRange.value = currValue;

    //Change slide thumb color on mouse up
    if (currValue < 20) {
        inputRange.classList.remove('ltpurple');
    }
    if (currValue < 40) {
        inputRange.classList.remove('purple');
    }
    if (currValue < 60) {
        inputRange.classList.remove('pink');
    }
    
    // determine if we need to continue
    if(currValue > -1) {
      window.requestAnimationFrame(animateHandler);   
    }
    
    // decrement value
    currValue = currValue - speed;
}

// handle successful unlock
function successHandler() {
  alert('Unlocked');
};

// bind events
inputRange.addEventListener('mousedown', unlockStartHandler, false);
inputRange.addEventListener('mousestart', unlockStartHandler, false);
inputRange.addEventListener('mouseup', unlockEndHandler, false);
inputRange.addEventListener('touchend', unlockEndHandler, false);

// move gradient
inputRange.addEventListener('input', function() {
    //Change slide thumb color on way up
    if (this.value > 20) {
        inputRange.classList.add('ltpurple');
    }
    if (this.value > 40) {
        inputRange.classList.add('purple');
    }
    if (this.value > 60) {
        inputRange.classList.add('pink');
    }

    //Change slide thumb color on way down
    if (this.value < 20) {
        inputRange.classList.remove('ltpurple');
    }
    if (this.value < 40) {
        inputRange.classList.remove('purple');
    }
    if (this.value < 60) {
        inputRange.classList.remove('pink');
    }
});
!
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