1.表格tooltip 统一修改

<el-table
   :data="tableDatas"
   tooltip-effect="light"

.el-tooltip__popper.is-light {
  background: #FFF;
  box-shadow: 0px 0px 8px 1px rgba(0,0,0,0.16);
  border-radius: 4px;
  opacity: 1;
  border: none;

  &[x-placement^=top] .popper__arrow:after {
    border-top-color: #fff;
  }

  &[x-placement^=top] .popper__arrow {
    border-top-color: rgba(0,0,0,0.16);
  }

}

2.表格加tooltip-effect

<el-table
        :data="tableDatas"
        :tooltip-effect="'mytooltip'"     //重点
      >
        <el-table-column
          prop=".."
          label="名称"
          :show-overflow-tooltip="true"
        ></el-table-column>
</el-table>
 
.is-mytooltip {
  background: #fff;
  color: #3759af;
  border: 1px solid rgb(158, 157, 157);
  font-size: 15px;
}

3. 文字提示

<el-tooltip
      ref="tlp"
      :content="text"
      effect="light"
      :disabled="!tooltipFlag"
      :placement="placement"
      :enterable="false"
      popper-class="my-pop"
    >
      <span >{{ text }}</span>
    </el-tooltip>




.my-pop.el-tooltip__popper.is-light{
  background: #FFF;
  //box-shadow: $boxShadow;
  filter: drop-shadow(0px 0px 1px rgba(0,0,0,0.16));
  border-radius: 4px;
  opacity: 1;
  border: none;

  max-width: 560px;
  position: relative;

 //三角形颜色修改
  &[x-placement^=bottom] .popper__arrow:after{
    border-bottom-color: #fff;
  }
  &[x-placement^=bottom] .popper__arrow{
    border-bottom-color: rgba(0,0,0,0.16);
  }

}