vue3实现 后台管理系统登录与记住密码功能（element-plus）

一、效果

二、代码部分

   1、勾选记住密码布局代码

    2、判断是否勾选，勾选则保存账号密码，否则不保存账号密码，由于是demo,故并没有做加密，如果是生成最好是对密码做加密处理。

3、页面挂载的时候需要背叛的是否保存密码，保存的话直接获取密码填充

4、完整代码

longin_page.vue

<template>
    <el-row class="login-container">
        <el-col :lg="16" :md="12" class="left">
            <div>
                <div>欢迎光临</div>
                <div>此站点是《vue3 + vite实战商城后台开发》视频课程的演示地址</div>
            </div>
        </el-col>
        <el-col :lg="8" :md="12" class="right">
            <h2 class="title">欢迎回来</h2>
            <div>
                <span class="line"></span>
                <span>账号密码登录</span>
                <span class="line"></span>
            </div>
            <el-form ref="formRef" :rules="rules" :model="form" class="w-[250px]">
                <el-form-item prop="username">
                    <el-input v-model="form.username" placeholder="请输入用户名">
                        <template #prefix>
                            <el-icon>
                                <user />
                            </el-icon>
                        </template>
                    </el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input type="password" v-model="form.password" placeholder="请输入密码" show-password>
                        <template #prefix>
                            <el-icon>
                                <lock />
                            </el-icon>
                        </template>
                    </el-input>
                </el-form-item>
                <!-- 记住密码 -->
                <el-form-item class="isChecked">
                    <!-- `checked` 为 true 或 false -->
                    <el-checkbox v-model="form.checked" class="remeberPwd">记住密码</el-checkbox>
                </el-form-item>
                <!-- 登录模块 -->
                <el-form-item>
                    <el-button round color="#626aef" class="w-[250px]" type="primary" @click="onSubmit" :loading="loading">登
                        录</el-button>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<script setup>
import { ref, reactive, onMounted, onBeforeUnmount } from 'vue'
import { toast } from '~/composables/util'
import { useRouter } from 'vue-router'
import { useStore } from 'vuex'

const store = useStore()
const router = useRouter()

// do not use same name with ref
let form = reactive({
    username: "",
    password: "",
    // checked: false,
    // loginForm: {},
})

const rules = {
    username: [
        {
            required: true,
            message: '用户名不能为空',
            trigger: 'blur'
        },
    ],
    password: [
        {
            required: true,
            message: '用户名不能为空',
            trigger: 'blur'
        },
    ]
}

const formRef = ref(null)
const loading = ref(false)
const onSubmit = () => {
    formRef.value.validate((valid) => {
        if (!valid) {
            return false
        }
        loading.value = true

        store.dispatch("login", form).then(res => {

            toast("登录成功")

            // 判断是否记住密码
            if (form.checked) {
                localStorage.setItem("loginForm", JSON.stringify(form));
            } else {
                localStorage.setItem("loginForm", JSON.stringify({}));
            }
            // 路由跳转到首页
            router.push("/")
        }).finally(() => {
            loading.value = false
        })
    })
}


// 监听回车事件
function onKeyUp(e) {

    if (e.key == "Enter") onSubmit()
}

// 添加键盘监听
onMounted(() => {

    //在setup中，用来加载页面时，查看账户密码是否存在
    if (localStorage.getItem("loginForm")!=null&&Object.keys(localStorage.getItem("loginForm")).length>2 ) {
    
        form.checked = true;
        var userPwdInfo = JSON.parse(localStorage.getItem("loginForm"));

        form.username=userPwdInfo.username;
        form.password=userPwdInfo.password;

    } else {
        form.checked = false;
    }

    document.addEventListener("keyup", onKeyUp)

})
// 移除键盘监听
onBeforeUnmount(() => {
    document.removeEventListener("keyup", onKeyUp)
})

</script>

<style scoped>
.login-container {
    @apply min-h-screen bg-indigo-500;
}

.login-container .left,
.login-container .right {
    @apply flex items-center justify-center;
}

.login-container .right {
    @apply bg-light-50 flex-col;
}

.left>div>div:first-child {
    @apply font-bold text-5xl text-light-50 mb-4;
}

.left>div>div:last-child {
    @apply text-gray-200 text-sm;
}

.right .title {
    @apply font-bold text-3xl text-gray-800;
}

.right>div {
    @apply flex items-center justify-center my-5 text-gray-300 space-x-2;
}

.right .line {
    @apply h-[1px] w-16 bg-gray-200;
}
</style>