【vue】解决element-ui的el-select下拉框中选项内容太长问题

实现效果:

1.给下拉框设置最大宽度;

2.内容一行展示,不换行,多余部分显示省略号;

3.有省略号的那一行,加悬浮提示;

4.没有省略号的地方不加悬浮提示

---

代码展示:

<template>
  <el-select :popper-append-to-body="false">
    <el-option v-for = "item in dataList" :key = "item.value" :label = "item.label" :value = "item.value">
        <el-tooltip effect="light" :disabled="isShowTooltip" :content="item.label" placement="top">
          <div class="option-item" @mouseover="spanMouseenter($event)">
            {{ item.label }} 
          </div>
        </el-tooltip>
    </el-option>
  </el-select>
</template>
<script>
export default {
  data() {
    return {
      isShowTooltip: true,
    };
  },
  methods: {
    spanMouseenter(e) {
       let target = e.target
      if (target.clientWidth < target.scrollWidth) {
        this.isShowTooltip = false;
      } else {
        this.isShowTooltip = true;
      }
    },
  },
};
</script>
<style>
.option-item {
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}
.el-select /deep/ .el-select-dropdown__item {
  max-width: 600px;
}
</style>