组件代码

template>
  <div>
    <el-tooltip
      class="item"
      effect="dark"
      ref="ellipse_tooltip"
      :content="tooltipContent"
      :placement="placement"
    >
    </el-tooltip>
  </div>
</template>

<script>

export default {
  name: "xc-el-tooltip",
  props: {
    placement: {
      type: String,
      default: "top",
    },
  },
  data() {
    return {
      tooltipContent: "",
    };
  },
  methods: {
    handleDivMouseEnter(event) {
      const cell = event.target;
      if (cell.scrollWidth > cell.clientWidth) {
        const tooltip = this.$refs.ellipse_tooltip;
        this.tooltipContent = cell.innerText || cell.textContent;
        tooltip.referenceElm = cell;
        tooltip.doDestroy();
        tooltip.setExpectedState(true);
        tooltip.handleShowPopper();
      }
    },
    handleDivMouseleave() {
      const tooltip = this.$refs.ellipse_tooltip;
      if (tooltip) {
        tooltip.setExpectedState(false);
        tooltip.handleClosePopper();
      }
    },
  },
};
</script>
<style>
</style>

使用

<xc-el-tooltip ref="xcElTooltip"> </xc-el-tooltip>


 <div class="menu_title gray pl10 flex1"  @mouseenter="handleDivMouseEnter($event)"
    @mouseleave="handleDivMouseleave()"
       >
       {{ item.factoryName }}
    </div>





handleDivMouseEnter(event){
  console.log("this.==",this);
    this.$refs.xcElTooltip.handleDivMouseEnter(event);
  },
  handleDivMouseleave(){
    this.$refs.xcElTooltip.handleDivMouseleave();
  },



``

`