amis/scss/components/form/_range.scss

.#{$ns}RangeControl {
  position: relative;
  @include clearfix();

  padding-top: 1rem;
  padding-bottom: 1.1rem;

  &--withInput {
    .#{$ns}InputRange {
      width: calc(100% - 120px);
    }

    .#{$ns}InputRange-label--mid {
      left: calc(50% - 60px);
    }

    &.is-multiple {
      .#{$ns}InputRange {
        width: calc(100% - 210px);
      }
    }
  }

  .#{$ns}InputRange {
    &-input {
      font-size: $fontSizeSm;
      position: absolute;
      right: px2rem(26px);
      top: px2rem(12px);
      height: px2rem(30px);

      input {
        padding: px2rem(10px);
        width: px2rem(74px);
        height: 100%;

        &:focus {
          outline: none;
          border: $borderWidth solid $info;
        }
      }

      &-separator {
        display: inline-block;
        padding: 0 5px;
      }
    }

    &-unit {
      position: absolute;
      right: px2rem(10px);
      top: px2rem(7px);
    }

    &-clear {
      position: absolute;
      top: px2rem(18px);
      right: 0;
      cursor: pointer;

      svg {
        height: px2rem(16px);
        width: px2rem(16px);
        fill: #999;
      }
    }
  }
}

.#{$ns}InputRange {
  height: $InputRange-slider-height;
  position: relative;
  width: 100%;

  // slider
  &-slider {
    appearance: none;
    background: $InputRange-slider-bg;
    border: $InputRange-slider-border;
    // border-radius: 100%;
    cursor: pointer;
    display: block;
    width: $InputRange-slider-width;
    height: $InputRange-slider-height;
    margin-left: $InputRange-slider-width / -2;
    margin-top: $InputRange-slider-height / -2 + $InputRange-track-height / -2;
    outline: none;
    position: absolute;
    z-index: 2;
    top: 50%;
    transition: $InputRange-slider-transition;

    &:active {
      transform: $InputRange-slider-onActive-transform;
    }

    &:focus {
      box-shadow: $InputRange-slider-onFocus-boxShadow;
    }

    .input-range--disabled & {
      background: $InputRange-slider-onDisabled-bg;
      border: $InputRange-slider-onDisabled-border;
      box-shadow: none;
      transform: none;
    }

    &:before {
      content: '||';
      color: #fff;
      display: block;
      line-height: px2rem(22px);
      text-align: center;
    }
  }

  &-sliderContainer {
    transition: $InputRange-sliderContainer-transition;
  }

  // label
  &-label {
    color: $InputRange-label-color;
    font-family: $InputRange-fontFamily;
    font-size: $InputRange-label-fontSize;
    transform: translateZ(0);
    white-space: nowrap;
  }

  &-label--min,
  &-label--max,
  &-label--mid {
    bottom: $InputRange-label-positionBottom;
    position: absolute;
  }

  // &-label--min {
  //     left: px2rem(15px);
  // }

  &-label--mid {
    left: 50%;
    bottom: px2rem(-5px);
  }

  &-label--max {
    right: 0;
  }

  &-label--value {
    position: absolute;
    display: $InputRange-label--value-display;
    top: $InputRange-label--value-positionTop;
  }

  // label Container

  // &-labelContainer {
  //     left: -50%;
  //     position: relative;
  //     .#{$ns}InputRange-label--max & {
  //         left: 50%;
  //     }
  // }

  // track
  &-track {
    background: $InputRange-track-bg;
    // border-radius: 0;
    cursor: pointer;
    display: block;
    height: $InputRange-track-height;
    position: relative;
    transition: $InputRange-track-transition;

    .#{$ns}InputRange.is-disabled & {
      background: $InputRange-track-onDisabled-bg;
    }

    &.is-active {
      background: $InputRange-track-onActive-bg;
    }
  }

  &-track--background {
    left: 0.5rem;
    margin-top: -0.5 * $InputRange-track-height;
    position: absolute;
    right: 0.5rem;
    top: 50%;

    &::before,
    &::after {
      content: '';
      width: 0.5rem;
      height: 100%;
      position: absolute;
      top: 0;
      background: inherit;
      z-index: 1;
    }

    &::before {
      left: -0.5rem;
    }

    &::after {
      right: -0.5rem;
    }
  }

  &-track--active {
    background: $InputRange-track-onActive-bg;
  }
}