el-table 设置内容超出宽度后省略，并添加tooltip

只需要在el-table-item 标签中添加属性 :show-overflow-tooltip="true"

例子

<template>
  <div style="width:100%; display: flex; justify-content: center;">
    <el-table :data="tableData" stripe style="width: 80%">
      <el-table-column 
        prop="name" 
        label="Name" 
        min-width="180" 
      />

      <el-table-column 
        prop="content" 
        label="Content" 
        width="180" 
        :show-overflow-tooltip="true" 
      />
    </el-table>
  </div>
</templa

<script>
export default {
  name: 'EltableTest',
  data() {
    return {
      tableData: [
        {
          name: '测试1',
          content: '一二三四五六七八九十一二三四五六七八九十',
        },
        {
          name: '测试2',
          content: '一二三四五六七八九十一二三四五六七八九十',
        },
        {
          name: '测试3',
          content: 'Tom',
        }
      ]
    };
  }
}
</script>

运行结果