話不多說，直接上程式碼。

html部分：

JS部分：

data() {
return {
logining: false,
ruleForm2: {
account: '',
checkPass: ''
},
rules2: {
account: [
{required: true, message: '請輸入賬號', trigger: 'blur'},
],
checkPass: [
{required: true, message: '請輸入密碼', trigger: 'blur'},
]
},
checked: true,
msg:''
};
},
methods: {
handleSubmit2(formName) {
let self = this;
//判斷複選框是否被勾選 勾選則呼叫配置cookie方法
if (self.checked == true) {
//傳入賬號名，密碼，和儲存天數3個引數
self.setCookie(self.ruleForm2.account, self.ruleForm2.checkPass, 7);
}else {
//清空Cookie
self.clearCookie();
}

        //設定cookie
        setCookie(c_name, c_pwd, exdays) {
            var exdate = new Date(); //獲取時間
            exdate.setTime(exdate.getTime() + 24 * 60 * 60 * 1000 * exdays); //儲存的天數
            //字串拼接cookie
            window.document.cookie = "userName" + "=" + c_name + ";path=/;expires=" + exdate.toGMTString();
            window.document.cookie = "userPwd" + "=" + c_pwd + ";path=/;expires=" + exdate.toGMTString();
        },
        //讀取cookie
        getCookie: function() {
            if (document.cookie.length > 0) {
                var arr = document.cookie.split('; '); //這裡顯示的格式需要切割一下自己可輸出看下
                for (var i = 0; i < arr.length; i++) {
                    var arr2 = arr[i].split('='); //再次切割
                    //判斷查詢相對應的值
                    if (arr2[0] == 'userName') {
                        this.ruleForm2.account = arr2[1]; //儲存到儲存資料的地方
                    } else if (arr2[0] == 'userPwd') {
                        this.ruleForm2.checkPass = arr2[1];
                    }
                }
            }
        },
        //清除cookie
        clearCookie: function() {
            this.setCookie("", "", -1); //修改2值都為空，天數為負1天就好了
        }

    },
    mounted(){
        this.getCookie();
    }
}