*父父元件（helloWorld.vue）:

<template>
  <div class="hello-world">
    <el-button type="text" @click="saveAll" class="button">SAVE</el-button>
    <promise-father ref="promiseFather"></promise-father>
  </div>
</template>
<script>
import PromiseFather from './promiseFather'
export default {
  name: `HelloWorld`,
  components: { PromiseFather },
  data () {
    return {
      promiseFather: ''
    }
  },
  methods: {
    saveAll () {
      this.$refs.promiseFather.validate(valid => {
        if (valid) {
          this.$message.success('(^o^)~ 驗證成功！')
        } else {
          this.$message.error('-_- 驗證失敗！')
        }
      })
    }
  }
}
</script>
<style scoped>
  .button {
    position: absolute;
    top: 60px;
    left: 660px;
  }
</style>

 

*父元件（promiseFather.vue）:

<template>
  <div class="promise-father">
    <h2>{{ title }}
      <el-button type="text" @click="add" class="button">新增</el-button>
    </h2>
    <div v-for="(item, index) in validateSet" :key="item.id">
      <promise-child ref="promiseChild" :formData="item" :index="index" @remove="remove"></promise-child>
    </div>
  </div>
</template>
<script>
import uuid from 'uuid'
import PromiseChild from '@/components/promiseChild'
export default {
  name: `PromiseFather`,
  components: {
    PromiseChild
  },
  data () {
    return {
      title: 'WHY! mtw',
      promiseChild: '',
      validateSet: []
    }
  },
  methods: {
    validate (callback) {
      if (this.validateSet && this.validateSet.length > 0) {
        const promiseList = []
        this.$refs.promiseChild.forEach((item, index) => {
          promiseList.push(item.validate())
        })
        Promise.all(promiseList).then(() => {
          callback(true)
        }).catch(() => {
          callback(false)
        })
      } else {
        callback(true)
      }
    },
    add () {
      this.validateSet.push({
        name: '',
        phone: '',
        id: uuid.v4()
      })
    },
    remove (num) {
      this.validateSet.splice(num, 1)
    }
  }
}
</script>
<style scoped>
  .index {
    margin-left: -546px;
  }
  .button {
    margin-left: 60px;
  }
</style>
 

*子元件（promiseChild.vue）:

<template>
  <div class="promise-child">
    <el-form :model="form" ref="form" :rules="formRules" :inline="true" label-position="right">
      <el-form-item :label="`${index + 1}`+'、'">
      </el-form-item>
      <el-form-item label="姓名" prop="name">
        <el-input v-model="form.name" size="small"></el-input>
      </el-form-item>
      <el-form-item  label="手機" prop="phone">
        <el-input v-model="form.phone" size="small"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button @click="remove" size="small">刪除</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import uuid from 'uuid'
export default {
  name: `PromiseChild`,
  props: {
    formData: Object,
    index: Number
  },
  data () {
    return {
      form: {
        name: '',
        phone: '',
        id: uuid.v4()
      },
      formRules: {
        name: [
          { required: true, message: '請輸入姓名！', trigger: 'blur' }
        ],
        phone: [
          { required: true, message: '請輸入手機號碼', trigger: 'blur' },
          { max: 11, message: '長度不能超過11', trigger: 'blur' },
          {
            validator: (rules, value, callback) => {
              if (value) {
                let regPhone = /^(13[0-9]|15[012356789]|18[0123456789]|147|145|17[0-9])\d{8}$/
                if (regPhone.test(value)) {
                  callback()
                } else {
                  callback('請輸入正確的手機號碼！')
                }
              } else {
                callback('請輸入手機號碼!')
              }
            }
          }
        ]
      }
    }
  },
  methods: {
    validate () {
      return new Promise((resolve, reject) => {
        this.$refs.form.validate(valid => {
          if (valid) {
            resolve()
          } else {
            reject()
          }
        })
      })
    },
    remove () {
      this.$emit('remove', this.index)
    }
  }
}
</script>