vue表单自定义校验规则

<div id="app">
<el-form :model="ruleForm2" :rules="rules2" ref="ruleForm2" label-width="100px" class="demo-ruleForm">
<el-form-item label="密码" prop="pass">
<el-input type="password" v-model="ruleForm2.pass" auto-complete="off"></el-input>
</el-form-item>
<el-form-item label="确认密码" prop="checkPass">
<el-input type="password" v-model="ruleForm2.checkPass" auto-complete="off"></el-input>
</el-form-item>
<el-form-item label="年龄" prop="age">
<el-input v-model.number="ruleForm2.age"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="submitForm('ruleForm2')">提交</el-button>
<el-button @click="resetForm('ruleForm2')">重置</el-button>
</el-form-item>
</el-form>
</div>

var Main = {
    data() {
var checkAge = (rule, value, callback) => {
if (!value) {
return callback(new Error('年龄不能为空'));
        }
        setTimeout(() => {
if (!Number.isInteger(value)) {
 callback(new Error('请输入数字值'));
 } else {
if (value < 18) {
 callback(new Error('必须年满18岁'));
 } else {
 callback();
 }
 }
 }, 1000);
 };
var validatePass = (rule, value, callback) => {
if (value === '') {
          callback(new Error('请输入密码'));
        } else {
if (this.ruleForm2.checkPass !== '') {
this.$refs.ruleForm2.validateField('checkPass');
          }
          callback();
        }
      };
var validatePass2 = (rule, value, callback) => {
if (value === '') {
          callback(new Error('请再次输入密码'));
        } else if (value !== this.ruleForm2.pass) {
          callback(new Error('两次输入密码不一致!'));
        } else {
          callback();
        }
      };
return {
ruleForm2: {
pass: '',
checkPass: '',
age: ''
        },
rules2: {
pass: [
            { validator: validatePass, trigger: 'blur' }
          ],
checkPass: [
            { validator: validatePass2, trigger: 'blur' }
          ],
age: [
            { validator: checkAge, trigger: 'blur' }
          ]
        }
      };
    },
methods: {
      submitForm(formName) {
this.$refs[formName].validate((valid) => {
if (valid) {
 alert('submit!');
 } else {
console.log('error submit!!');
return false;
 }
 });
 },
resetForm(formName) {
this.$refs[formName].resetFields();
 }
 }
 }
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')