vue项目实现记住密码到cookie功能

一、前言

基于这种功能的实现网上已经有很多教程，我只是重新熟悉一下。毕竟好记性不如烂笔头，不喜勿喷

二、实现功能

1.记住密码勾选，点登陆时，将账号和密码保存到cookie，下次登陆自动显示到表单内
2.不勾选，点登陆时候则清空之前保存到cookie的值，下次登陆需要手动输入

代码实现

HTML

<div class="login">
  <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="0px" class="demo-ruleForm">
            <el-form-item prop="username">
                <el-input v-model="ruleForm.username" placeholder="用户名"></el-input>
            </el-form-item>
            <el-form-item prop="password">
                <el-input type="password" placeholder="密码" v-model="ruleForm.password" @keyup.enter.native="submitForm('ruleForm')"></el-input>
            </el-form-item>
            <!-- `checked` 为 true 或 false 我一般默认为true-->
            <el-checkbox v-model="checked">记住密码</el-checkbox>
            <br>
            <br>
            <div class="login-btn">
                <el-button type="primary" @click="submitForm('ruleForm')">登录</el-button>
            </div>
        </el-form>
</div>

JS部分

export default {
  data(){
    return{
      ruleForm:{
        username:"",
        password:"",
      },
      rules:{
          username:[{ required: true, message: "请输入账号", trigger: "blur" }] ,
          password:[{ required: true, message: "请输入密码", trigger: "blur" }]
     },
      checked:true //默认勾选
    }  
  },
  //页面加载调用获取cookie值
    mounted() {
        this.getCookie();
    },
     methods: {
        submitForm(formName) {
          const self = this;
         //判断复选框是否被勾选 勾选则调用配置cookie方法
          if (self.checked == true) {
             console.log("checked == true");
             //传入账号名，密码，和保存天数3个参数
             self.setCookie(self.ruleForm.username, self.ruleForm.password, 7);
          }else {
             //清空Cookie
             self.clearCookie();
         }
        //与后台交互代码，用于登录存储部分数据
     },
    //设置cookie
      setCookie(c_name, c_pwd, exdays) {
         var exdate = new Date(); //获取时间
         exdate.setTime(exdate.getTime() + 24 * 60 * 60 * 1000 * exdays); //保存的天数
       //字符串拼接cookie
       window.document.cookie = "userName" + "=" + c_name + ";path=/;expires=" + exdate.toGMTString();
       window.document.cookie = "userPwd" + "=" + c_pwd + ";path=/;expires=" + exdate.toGMTString();
     },
      //读取cookie
       getCookie: function() {
         if (document.cookie.length > 0) {
              var arr = document.cookie.split('; '); //这里显示的格式需要切割一下自己可输出看下
              for (var i = 0; i < arr.length; i++) {
                   var arr2 = arr[i].split('='); //再次切割
                   //判断查找相对应的值
                    if (arr2[0] == 'userName') {
                       this.ruleForm.username = arr2[1]; //保存到保存数据的地方
                    } else if (arr2[0] == 'userPwd') {
                       this.ruleForm.password = arr2[1];
                    }
             }
         }
     },
    //清除cookie
     clearCookie: function() {
        this.setCookie("", "", -1); //修改2值都为空，天数为负1天就好了
     }
}