登录校验页面

<script setup lang="ts">
import { ref } from 'vue'
import { mobileRules, passwordRules } from '@/utils/rules'
const mobile = ref('')
const password = ref('')
</script>

<!-- 表单 -->
    <van-form autocomplete="off">
      <van-field
        v-model="mobile"
        :rules="mobileRules"
        placeholder="请输入手机号"
        type="tel"
      ></van-field>
      <van-field
        v-model="password"
        :rules="passwordRules"
        placeholder="请输入密码"
        type="password"
      ></van-field>

封装校验页面utils/rules.ts
提取表单校验规则（为了其他页面复用）
加上 FieldRule ，可以有提示，提高效率

import type { FieldRule } from 'vant'
const mobileRules = [
  { required: true, message: '请输入手机号' },
  { pattern: /^1[3-9]\d{9}$/, message: '手机号不正确' }
]
const passwordRules: FieldRule[] = [
  { required: true, message: '请输入密码' },
  { pattern: /^\w{8,24}$/, message: '密码必须是8-24个字符' }
]
export { mobileRules, passwordRules }

效果图：

表单整体校验
加上native-type=“submit”，只有是submit时才能触发校验，这样点击登录就可以实现整体校验
" native-type" 是按钮的原始类型，通常用于表示某种原生的类型。

 <div class="cp-cell">
    <van-button native-type="submit" block round type="primary">登 录</van-button>
  </div>

复选框校验

//默认为false不勾选
const agree = ref(false)
const onSubmit = () => {
//如果agree.value不存在，也就是值为false，则提示勾选
  if (!agree.value) {
    return showToast('请勾选协议')
  }
  console.log(111)
}

submit提交表单且验证通过后触发

  <van-form autocomplete="off" @submit="onSubmit">
	<div class="cp-cell">
	   <van-checkbox v-model="agree">
	       <span>我已同意</span>
	       <a href="javascript:;">用户协议</a>
	       <span>及</span>
	       <a href="javascript:;">隐私条款</a>
	     </van-checkbox>
	  </div>
  </van-form>