Vue编写登录注册页面前端校验

登录注册校验

template页面

 <div class="app-login">
    <!--登录  -->
    <div class="form">
      <el-form ref="form" size="large" autocomplete="off" v-if="isLogin" :model="registerData" :rules="rules"
        label-width="120px">
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item label="用户名" prop="username">
          <el-input :suffix-icon="Wicon" maxlength="5" :prefix-icon="User"  v-model="registerData.username" type="username" autocomplete="off" />
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input :suffix-icon="Wicon2" maxlength="8" :prefix-icon="Lock" show-password v-model="registerData.password" type="password" autocomplete="off" />
        </el-form-item>
        <div class="bt">
          <el-form-item>
            <el-button type="primary" @click="submitForm(ruleFormRef)">登录</el-button>
            <el-button @click="resetForm()">重置</el-button>
            <el-button @click="isLogin = false">去注册</el-button>
          </el-form-item>
        </div>
      </el-form>
      <!--注册  -->
      <el-form ref="form" size="large" autocomplete="off" v-else :model="registerData" :rules="rules" label-width="120px">
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item label="账户" prop="username">
          <el-input :prefix-icon="User" maxlength="5" :suffix-icon="Wicon" v-model="registerData.username" type="username"
            autocomplete="off" />
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input :prefix-icon="Lock" :suffix-icon="Wicon2"  maxlength="8" show-password v-model="registerData.password" type="password"
            autocomplete="off" />
        </el-form-item>
        <el-form-item label="确认密码" prop="repassword">
          <el-input :prefix-icon="Lock" :suffix-icon="Wicon3" maxlength="8"  show-password   v-model="registerData.repassword" type="password"
            autocomplete="off" />
        </el-form-item>
        <div class="bt">
          <el-form-item>
            <el-button type="primary" @click="submitForm(ruleFormRef)">注册</el-button>
            <el-button @click="resetForm()">重置</el-button>
            <el-button @click="isLogin = true">去登录</el-button>
          </el-form-item>
        </div>
      </el-form>
    </div>
  </div>

script

import { User, Lock, CircleCheck, CircleCloseFilled } from '@element-plus/icons-vue'
import { ref } from 'vue'
// 默认是登录
const isLogin = ref(true)
const registerData = ref({
  username: '',
  password: '',
  repassword: ''
})
// 图标
const Wicon = ref('')
const Wicon2 = ref('')
const Wicon3 = ref('')


// 用户名自定义校验icon
const checkicon = (rule, value, callback) => {
  if (registerData.value.username.length >= 2 && registerData.value.username.length <= 8) {
    Wicon.value = CircleCheck
  }else if(registerData.value.username.length === 0){
    Wicon.value = CircleCloseFilled
    callback(new Error("请输入用户名"))
  } 
  else {
    Wicon.value = CircleCloseFilled
    callback(new Error("用户名需2到8位"))
  }
}
// 密码自定义校验
const checkicon2 = (rule, value, callback) => {
  if (registerData.value.password.length >= 4 && registerData.value.password.length <= 8) {
    Wicon2.value = CircleCheck
  } 
  else if(registerData.value.password.length === 0){
    Wicon2.value = CircleCloseFilled
    callback(new Error("请输入密码"))
  }  
  else {
    Wicon2.value = CircleCloseFilled
    callback(new Error("密码需4到8位"))
  }
}

// 校验确认密码函数
const checkPassword = (rule, value, callback) => {
  if (registerData.value.repassword == '') {
    Wicon3.value= CircleCloseFilled
    callback(new Error("请输入确认密码"))

  } else if (registerData.value.repassword !== registerData.value.password) {
    Wicon3.value = CircleCloseFilled
    callback(new Error("两次密码不一致"))
  } else {
    Wicon3.value = CircleCheck
    callback()
  }
}
// 定义表单校验规则
const rules = {
  username: [{ required: true, validator: checkicon,trigger: 'change' }],
  password: [
  { required: true, validator: checkicon2, trigger: 'change' }],

  repassword: [{ validator: checkPassword, trigger: 'change' }]

}
// 清空函数
const resetForm = (value) => {
  registerData.value.username = '';
  registerData.value.password = '';
  registerData.value.repassword = '';
}

css部分，个人审美较差。

.app-login {
  border-radius: 30px;
  height: 500px;
  width: 500px;
  display: flex;
  justify-content: space-around;
  align-items: flex-start;
  flex-direction: column-reverse;
  border: 2px solid #ccc;
  padding: 8px;
  margin: -200px;
  // background-image: url(https://p4.itc.cn/q_70/images03/20230308/8f6053ee5e6348febfda49f7c31ebdf6.jpeg);
  // background-repeat: no-repeat;
  // background-size: cover;
  font-family: "Helvetica Neue"
}

h1 {
  padding-left: 80px;
  margin-bottom: 20px;
}

.form {
  padding: 20px;
  flex: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.bt {
  margin-top: 50px;
}