vxe-table/styles/header.scss

/**Variable**/

.vxe-table--header-wrapper {
  background-color: $vxe-table-header-background-color;
  .vxe-table--repair {
    position: absolute;
    left: 0;
    bottom: 0;
    height: 1px;
    background-color: $vxe-table-border-color;
  }
}

.vxe-header--column {
  position: relative;
  &.col--title-checked {
    background-color: $vxe-table-column-header-checked-background-color;
  }
  .vxe-required-icon {
    display: inline-block;
    color: $vxe-table-validate-error-color;
    line-height: 16px;
    font-size: 16px;
    vertical-align: middle;
    &:before {
      content: "*";
      width: 10px;
      height: 8px;
      display: block;
    }
  }
  .vxe-edit-icon {
    font-size: 12px;
    margin: 1px 2px 2px 2px;
  }
  .vxe-resizable {
    position: absolute;
    right: -7px;
    top: 0;
    width: 14px;
    height: 100%;
    text-align: center;
    z-index: 1;
    user-select: none;
    cursor: col-resize;
    &.is--line {
      &:before,
      &:after {
        content: "";
        display: inline-block;
        vertical-align: middle;
      }
      &:before {
        width: 1px;
        height: 50%;
        background-color: $vxe-table-resizable-color;
      }
      &:after {
        width: 0;
        height: 100%;
      }
    }
  }
}

.vxe-table--fixed-right-wrapper {
  .vxe-header--column {
    .vxe-resizable {
      right: auto;
      left: -7px;
    }
  }
}