vue项目登录页面实现记住用户名和密码

记录一下实现的逻辑，应该分两步来理解这个逻辑

• 首次登录，页面没有用户的登录信息，实现逻辑如下：

  1. 用户输入用户名和密码登录，用户信息为名为form的响应式对象，v-model分别对应两个输入框
  2. 用户点击登录实现登录功能
  3. 判断是否勾选了记住密码，v-model一个CheckBox，勾选为true，不勾选为false，默认false
     • 若勾选记住密码，则在浏览器的localstorage中写入一个名为loginInfo的对象，值为字符串后的form
     • 若没有勾选，同样在localstorage中写入一个名为loginInfo的对象，值为空

  

• 下次再登录，就会根据上一次的勾选状态来判断是否填充form输入框，逻辑如下

  挂载页面时，判断localstorage中是否有需要的对象

  • 如果有，就把rememberMe的值设为true，并向页面的输入框填充用户名和米面
  • 如果没有，就把rememberMe的值设为false

  因为逻辑比较简单，就不再画图了

放一下相关的代码

<template><div class="login"><el-form ref="formRef" :model="form" :rules="rules" class="login-form"><h3 class="title">登录</h3><el-form-item prop="username"><el-input v-model="form.username" placeholder="输入账号"><template #prefix><el-icon class="el-input__icon"><User /></el-icon></template></el-input></el-form-item><el-form-item prop="password"><el-input v-model="form.password" placeholder="输入密码" type="password" show-password@keyup.enter.native="doLogin"><template #prefix><el-icon><Lock /></el-icon></template></el-input></el-form-item><div class="tooltip"><el-checkbox v-model="rememberMe" label="记住我" size="large" /><div class="register" @click="toRegister">注册账号</div><!-- <a href="#">忘记密码</a> --></div><el-form-item><el-button style="width: 100%" @click="doLogin" class="input">登录</el-button></el-form-item><div class="sep"><div style="margin-top: -11px"><label>联系我们</label></div></div></el-form></div>
</template><script setup>
import { reactive, ref, onMounted } from 'vue'
import { useUserStore } from '@/stores/user';
import { useRouter } from 'vue-router'
import { ElMessage } from 'element-plus';
const userStore = useUserStore()
const router = useRouter()
import http from '@/utils/http'
// import axios from 'axios'const rememberMe = ref(false)
const formRef = ref(null)
const form = ref({username: '',password: ''
})const rules = {username: [{ required: true, message: "用户名不能为空", trigger: "blur" },{ min: 2, max: 30, message: "长度在 2 到 30 个字符", trigger: "blur" }],password: [{ required: true, message: "密码不能为空", trigger: "blur" },{ min: 3, max: 30, message: "长度在 6 到 30 个字符", trigger: "blur" }],
}const doLogin = () => {const { username, password } = form.valueconst data = { username, password }// console.log(data)formRef.value.validate(async valid => {if (valid) {try {await userStore.getUserInfo(data)// console.log('sdfdssff', userStore.userInfo)if (userStore.userInfo.Authorization) {if(rememberMe.value){localStorage.setItem('loginInfo', JSON.stringify(form.value))} else {localStorage.setItem('loginInfo', JSON.stringify({}))}router.push('/')}} catch (error) {ElMessage.error('用户名或密码错误')}}else { ElMessage.error('校验没通过') }})
}const toRegister = () => {router.push('/register')
}// 页面加载时监听是否有记住密码
onMounted(() => {// console.log(Object.keys(localStorage.getItem('loginInfoTs')))if(localStorage.getItem('loginInfo') != null && Object.keys(localStorage.getItem('loginInfo')).length > 2){rememberMe.value = trueconst loginInfo = JSON.parse(localStorage.getItem('loginInfo'))form.value.username = loginInfo.usernameform.value.password = loginInfo.password} else {rememberMe.value = false}
})
</script>核心代码是doLogin方法和onMounted中的内容