ant-design/components/tree/style/directory.less

@import '../../style/themes/index';

@tree-prefix-cls: ~'@{ant-prefix}-tree';

.@{tree-prefix-cls} {
  &.@{tree-prefix-cls}-directory {
    // ================== TreeNode ==================
    .@{tree-prefix-cls}-treenode {
      position: relative;

      // Hover color
      &::before {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 4px;
        left: 0;
        transition: background-color 0.3s;
        content: '';
        pointer-events: none;
      }

      &:hover {
        &::before {
          background: @item-hover-bg;
        }
      }

      // Elements
      > * {
        z-index: 1;
      }

      // >>> Switcher
      .@{tree-prefix-cls}-switcher {
        transition: color 0.3s;
      }

      // >>> Title
      .@{tree-prefix-cls}-node-content-wrapper {
        border-radius: 0;
        user-select: none;

        &:hover {
          background: transparent;
        }

        &.@{tree-prefix-cls}-node-selected {
          color: @tree-directory-selected-color;
          background: transparent;
        }
      }

      // ============= Selected =============
      &-selected {
        &:hover::before,
        &::before {
          background: @primary-color;
        }

        // >>> Switcher
        .@{tree-prefix-cls}-switcher {
          color: @tree-directory-selected-color;
        }

        // >>> Title
        .@{tree-prefix-cls}-node-content-wrapper {
          color: @tree-directory-selected-color;
          background: transparent;
        }
      }
    }
  }
}