Vue dynamic increase and decrease form + validation

Foreword:

In the vue + element project, when the form form needs to be dynamically added and deleted, I made a small demo. The effect is probably like this:

The main thing I want to talk about here is that a certain attribute in the form is an array, and I want to verify each data in each array, how to configure it?

html part of the code: 

<template>
  <div class="hello">
    <el-form :model="form" :rules="rules" ref="form" label-width="100px">
      <el-row v-for="(item, index) in form.data" :key="index">
        <el-col :span="8">
            <el-form-item label="姓名" :prop="`data[${index}].name`" :rules='rules.name'>
                <el-input v-model="item.name"  clearable></el-input>
            </el-form-item>
        </el-col>
          <el-col :span="8">
            <el-form-item label="年龄" :prop="`data[${index}].age`" :rules='rules.age'>
                <el-input v-model="item.age" clearable></el-input>
            </el-form-item>
        </el-col>
      </el-row>
      <el-form-item>
          <el-button type="primary" @click="add()">添加</el-button>
          <el-button type="primary" @click="submitForm('form')">提交</el-button>
          <el-button @click="resetForm('form')">重置</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

The rules are configured separately for each item, and :prop="`data[${index}].name`" can also be written as follows:

:prop="'data.' + index + '.name'"

js part of the code: 

<script>
export default {
  name: 'HelloWorld',
  data () {
    return {
      form: {
        data: []
      },
      rules: {
        name: [
          { required: true, message: '请输入姓名', trigger: 'blur' }
        ],
        age: [
          { required: false, message: '请输入年龄', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    submitForm (formName) {
      this.$refs[formName].validate((valid) => {
        if (valid) {
          alert('submit!')
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    // 点击添加一条数据
    add () {
      this.form.data.push({
        name: '',
        age: null
      })
    },
    resetForm (formName) {
      this.$refs[formName].resetFields()
    }
  }
}
</script>