vue中Element表单验证的使用方法

<template>
  <el-form :model='form' ref='domForm' :rules='rules'>
    <el-form-item prop='name' lable='名字'>
      <el-input v-model='form.name'>
    </el-form-item>
  </el-form>
</template>

export default {
  data() {
    this.rules = {
      name: { type: 'string', required: true, trigger: 'blur' }
    }

    return {
      form: {
        name: ''
      }
    }
  },
  methods: {
    submit() {
      this.$refs.domForm.validate(valid => {
        if (!valid) {
          // 验证不通过
        }

        // 验证通过后的处理...
      })
    }
  }
}

// 返回一个规则数组，必填且字符串长度在2~10之间
export const name = (msg, min = 2, max = 10, required = true) => ([
  { required, message: msg, trigger: 'blur' },
  { min, max, message: `长度在${min}~${max}个字符`, trigger: 'blur' }
])

// 邮箱
export const email = (required = true) => ([
  { required, message: '请输入邮箱', trigger: 'blur' },
  { type: 'email', message: '邮箱格式不对', trigger: 'blur' }
])

/* 自定义验证规则 */

// 大于等于某个整数
const biggerAndNum = num => (rule, v, cb) => {
  const isInt = /^[0-9]+$/.test(v)
  if (!isInt) {
    return cb(new Error('要求为正整数'))
  }

  if (v < num) {
    return cb(new Error(`要求大于等于${num}`))
  }
  return cb()
}

export const biggerInt = (int, required = true) => ([
  { required, message: '必填', trigger: 'blur' },
  { validator: biggerAndNum(int), trigger: 'blur' }
])

export default class CreateRules {
  constructor() {
    super()
    this.rules = []
  }

  need(msg = '必填', trigger = 'blur') {
    this.rules.push({
      required: true,
      message: msg,
      trigger
    })
    return this
  }
  
  url(message = '不是合法的链接', trigger = 'blur') {
    this.rules.push({
      type: 'url',
      trigger,
      message
    })
    return this
  }

  get() {
    const res = this.rules
    this.rules = []
    return res
  }
}

const createRules = new CreateRules()

//规则
const needUrl = createRules.need().url().get()
const isUrl = createRules.url().get()

// imgUrl必填且是链接；href可选不填，如果填写必须是链接
const rules = {
  imgUrl: needUrl,
  href: isUrl
}

// deep rule 定义
// urls是数组，长度大于1
// urls的元素是链接
const urls = ['http://www.baidu.com', 'http://www.baidu.com']

const rules = {
  urls: {
    type: 'array',
    min: 1,
    defaultField: isUrl
  }
}