vue3 表单验证规则

以下是Vue3中的表单验证规则的示例：

import { ref, reactive } from 'vue';
import { FormInstance, FormRules } from 'element-plus';

// 创建表单实例
const ruleFormRef = ref<FormInstance>();

// 表单数据对象
const ruleForm = reactive({
  userId: "",
  email: "test@qq.com",
  pwd1: "",
  pwd2: "",
});

// 校验规则
const rules = reactive<FormRules>({
  userId: [
    { required: true, message: '请输入用户ID', trigger: 'blur' },
    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
  ],
  email: [
    { required: true, message: '请输入邮箱', trigger: 'blur' },
    { type: 'email', message: '请输入正确的邮箱格式', trigger: ['blur', 'change'] }
  ],
  pwd1: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    { min: 6, max: 20, message: '长度在 6 到 20 个字符', trigger: 'blur' }
  ],
  pwd2: [
    { required: true, message: '请再次输入密码', trigger: 'blur' },
    { validator: (rule, value, callback) => {
        if (value !== ruleForm.pwd1) {
          callback(new Error('两次输入密码不一致'));
        } else {
          callback();
        }
      }, trigger: 'blur'
    }
  ]
});

// 在模板中使用表单和规则
<template>
  <el-form :model="ruleForm" :rules="rules" ref="ruleFormRef">
    <el-form-item label="用户ID" prop="userId">
      <el-input v-model="ruleForm.userId"></el-input>
    </el-form-item>
    <el-form-item label="邮箱" prop="email">
      <el-input v-model="ruleForm.email"></el-input>
    </el-form-item>
    <el-form-item label="密码" prop="pwd1">
      <el-input type="password" v-model="ruleForm.pwd1"></el-input>
    </el-form-item>
    <el-form-item label="确认密码" prop="pwd2">
      <el-input type="password" v-model="ruleForm.pwd2"></el-input>
    </el-form-item>
    <el-form-item>
      <el-button type="primary" @click="submitForm">提交</el-button>
    </el-form-item>
  </el-form>
</template>

// 提交表单
const submitForm = () => {
  ruleFormRef.value.validate((valid) => {
    if (valid) {
      // 表单验证通过，执行提交操作
      // ...
    } else {
      // 表单验证失败，进行错误处理
      // ...
    }
  });
};