效果如下:

省市区三级联动插件: v-distpicker

github地址: https://github.com/jcc/v-distpicker

效果的部分代码:

一.html代码

<div class="content">
    <!-- 省市区三级联动 -->
    <v-distpicker @selected="selected"></v-distpicker>
    <!-- 表单内容 -->
    <el-form
      :model="ruleForm"
      ref="ruleForm"
      label-width="100px"
      class="demo-ruleForm"
    >
      <el-form-item label="学校名称">
        <el-input v-model="ruleForm.schoolName"></el-input>
      </el-form-item>
      <el-form-item label="详细地址">
        <el-input v-model="ruleForm.addr"></el-input>
      </el-form-item>
      <el-form-item label="联系人">
        <el-input v-model="ruleForm.concatUser"></el-input>
      </el-form-item>
      <el-form-item label="联系电话">
        <el-input v-model="ruleForm.concatUserPhone"></el-input>
      </el-form-item>

      <el-form-item label="销核平台账号">
        <el-input v-model="ruleForm.list[0].disapperName"></el-input>
      </el-form-item>
      <el-form-item label="销核平台密码">
        <el-input v-model="ruleForm.list[0].disapperPwd"></el-input>
      </el-form-item>

      <div v-show="userList >= 2">
        <el-form-item label="销核平台账号">
          <el-input v-model="ruleForm.list[1].disapperName"></el-input>
        </el-form-item>
        <el-form-item label="销核平台密码">
          <el-input v-model="ruleForm.list[1].disapperPwd"></el-input>
        </el-form-item>
      </div>

      <div v-show="userList >= 3">
        <el-form-item label="销核平台账号">
          <el-input v-model="ruleForm.list[2].disapperName"></el-input>
        </el-form-item>
        <el-form-item label="销核平台密码">
          <el-input v-model="ruleForm.list[2].disapperPwd"></el-input>
        </el-form-item>
      </div>
      <el-form-item>
        <el-button type="primary" @click.prevent="addUserList()"
          >新增加销核平台使用账户</el-button
        >
        <el-button type="primary" @click="submitForm()">保存新增</el-button>
      </el-form-item>
    </el-form>
    <div>
      {{ ruleForm }}
    </div>
  </div>

二.css(less)代码

.content {
    height: 710px;
    width: 100%;
    background-color: #fff;
    box-shadow: 2px 2px 5px #e6e6e6;
    box-sizing: border-box;
    overflow-x: auto;
    padding: 12px 44px;
    .distpicker-address-wrapper {
      text-align: left;
      margin-bottom: 20px;
      select {
        margin-right: 20px;
      }
    }
    .el-form {
      width: 600px;
    }
  }

三.js代码

import VDistpicker from 'v-distpicker' //引入省市区三级联动插件

export default {
  components: {
    VDistpicker // 注册省市区三级联动组件
  },
  data() {
    return {
      ruleForm: {
        province: '', // 省
        city: '', // 市
        area: '', // 区
        schoolName: '', // 学校名称
        addr: '', // 地址
        concatUser: '', // 联系人
        concatUserPhone: '', // 联系人电话
        list: [
          {
            disapperSort: 1,
            disapperName: '',
            disapperPwd: ''
          },
          {
            disapperSort: 2,
            disapperName: '',
            disapperPwd: ''
          },
          {
            disapperSort: 3,
            disapperName: '',
            disapperPwd: ''
          }
        ] // 校区销核用户
      }, // 表单内容
      userList: 1 // 销核平台账户数
    }
  },
  methods: {
    // 省市区选择最后一项触发
    selected(data) {
    // 对象的遍历,添加到另一对象中
      for (var obj in data) {
        this.ruleForm[obj] = data[obj].value
      }
    },
    // 新增销核平台使用账户数量
    addUserList() {
      if (this.userList >= 3) {
        this.$message({
          message: '最多只能增加三个哦!',
          type: 'warning'
        })
      } else {
        this.userList++
      }
    },
    // 保存新增
    submitForm() {
      console.log(this.ruleForm)
    }
  }
}