react-sketch-ruler/src/sketch-ruler/index.less

> In using react, the zoom operation used for page presentation

// 定义变量
@top-bottom-width: 4px;
@left-right-width: 100vw;
@offset: -3px;
@height: 100vh;
@width: 4px;

// 混入定义
.extendable-border(@top-bottom-width: @top-bottom-width, @left-right-width: @left-right-width, @offset: @offset) {
  position: absolute;
  left: 0;
  width: @left-right-width;
  &:before,
  &:after {
    content: '';
    display: inline-block;
    height: @top-bottom-width;
    width: @left-right-width;
    position: absolute;
  }
  &::before {
    top: @offset;
    left: 0;
  }
  &::after {
    bottom: @offset;
    left: 0;
  }
}

.vertical-border(@height: @height, @width: @width, @offset: @offset) {
  position: absolute;
  top: 0;
  height: @height;
  &:before,
  &:after {
    content: '';
    display: inline-block;
    width: @width;
    height: @height;
    position: absolute;
  }
  &::before {
    left: @offset;
    top: 0;
  }
  &::after {
    right: @offset;
    top: 0;
  }
}

.sketch-ruler {
  position: relative;
  z-index: 3;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-size: 12px;
  span {
    line-height: 1;
  }

  .defaultCursor {
    cursor: default !important;
  }

  .grabCursor {
    cursor: grab !important;
  }

  .corner {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: auto;
    cursor: pointer;
    box-sizing: content-box;
    transition: all 0.2s ease-in-out;
  }

  .canvasedit-parent {
    position: absolute;
  }

  .h-container,
  .v-container {
    position: absolute;
    .indicator {
      z-index: 4;
      position: absolute;
    }

    .line {
      position: absolute;
    }

    .action {
      position: absolute;
    }

    .value {
      transform: scale(0.83);
      padding: 5px;
      border-radius: 5px;
      font-size: 12px;
      white-space: nowrap;
    }
  }

  .h-container {
    top: 0;
    .line {
      .vertical-border();
    }
    .indicator {
      .extendable-border();
    }
  }

  .v-container {
    left: 0;
    .line {
      .extendable-border();
    }
    .indicator {
      .vertical-border();
    }
  }
}