react-photo-view/src/PhotoSlider.less

@keyframes PhotoView__fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.PhotoView {
  &-PhotoSlider__clean {
    .PhotoView-PhotoSlider__BannerWrap,
    .PhotoView-PhotoSlider__ArrowLeft,
    .PhotoView-PhotoSlider__ArrowRight,
    .PhotoView-PhotoSlider__FooterWrap {
      opacity: 0;

      &:hover {
        opacity: 0;
      }
    }
  }

  &-PhotoSlider__Backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: -1;
  }

  &-PhotoSlider__fadeIn {
    opacity: 0;
    animation: PhotoView__fade 0.4s linear both;
  }

  &-PhotoSlider__fadeOut {
    opacity: 0;
    animation: PhotoView__fade 0.4s linear both reverse;
  }

  &-PhotoSlider__BannerWrap {
    position: absolute;
    left: 0;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 44px;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    transition: opacity 0.2s ease-out;
    z-index: 20;

    &:hover {
      opacity: 1;
    }
  }

  &-PhotoSlider__Counter {
    padding: 0 10px;
    font-size: 14px;
    opacity: 0.75;
  }

  &-PhotoSlider__BannerRight {
    height: 100%;
  }

  &-PhotoSlider__Close {
    box-sizing: border-box;
    padding: 10px;
    opacity: 0.75;
    cursor: pointer;
    transition: opacity 0.2s linear;

    &:hover {
      opacity: 1;
    }
  }

  &-PhotoSlider__ArrowLeft,
  &-PhotoSlider__ArrowRight {
    position: absolute;
    top: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 70px;
    height: 100px;
    margin: auto;
    opacity: 0.75;
    z-index: 20;
    cursor: pointer;
    user-select: none;
    transition: opacity 0.2s linear;

    &:hover {
      opacity: 1;
    }

    svg {
      box-sizing: content-box;
      padding: 10px;
      width: 24px;
      height: 24px;
      fill: white;
      background: rgba(0, 0, 0, 0.3);
    }
  }

  &-PhotoSlider__ArrowLeft {
    left: 0;
  }

  &-PhotoSlider__ArrowRight {
    right: 0;
  }

  &-PhotoSlider__FooterWrap {
    box-sizing: border-box;
    position: absolute;
    left: 0;
    bottom: 0;
    padding: 10px;
    width: 100%;
    min-height: 44px;
    line-height: 1.5;
    font-size: 14px;
    color: #ccc;
    background-color: rgba(0, 0, 0, 0.5);
    text-align: justify;
    transition: opacity 0.2s ease-out;
    z-index: 20;
  }
}