vant/src-next/slider/index.less

@import '../style/var';

.van-slider {
  position: relative;
  width: 100%;
  height: @slider-bar-height;
  background-color: @slider-inactive-background-color;
  border-radius: @border-radius-max;
  cursor: pointer;

  // use pseudo element to expand click area
  &::before {
    position: absolute;
    top: -@padding-xs;
    right: 0;
    bottom: -@padding-xs;
    left: 0;
    content: '';
  }

  &__bar {
    position: relative;
    width: 100%;
    height: 100%;
    background-color: @slider-active-background-color;
    border-radius: inherit;
    transition: width @animation-duration-fast, height @animation-duration-fast;
  }

  &__button {
    width: @slider-button-width;
    height: @slider-button-height;
    background-color: @slider-button-background-color;
    border-radius: @slider-button-border-radius;
    box-shadow: @slider-button-box-shadow;

    &-wrapper {
      position: absolute;
      top: 50%;
      right: 0;
      transform: translate3d(50%, -50%, 0);
      cursor: grab;
    }
  }

  &--disabled {
    cursor: not-allowed;
    opacity: @slider-disabled-opacity;

    .van-slider__button-wrapper {
      cursor: not-allowed;
    }
  }

  &--vertical {
    display: inline-block;
    width: @slider-bar-height;
    height: 100%;

    .van-slider__button-wrapper {
      top: auto;
      right: 50%;
      bottom: 0;
      transform: translate3d(50%, 50%, 0);
    }

    // use pseudo element to expand click area
    &::before {
      top: 0;
      right: -@padding-xs;
      bottom: 0;
      left: -@padding-xs;
    }
  }
}