- 1.记住密码操作cookie
- 2.正则表达式
- 3.JavaScript 复杂判断的更优雅写法
- 4.js设计模式
-
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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
大体思路就是通过存/取/删cookie实现的；每次进入登录页，先去读取cookie，如果浏览器的cookie中有账号信息，就自动填充到登录框中，存cookie是在登录成功之后，判断当前用户是否勾选了记住密码，如果勾选了，则把账号信息存到cookie当中，效果图如上：
<div class="ms-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 -->
<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> //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 {
console.log("清空Cookie");
//清空Cookie
self.clearCookie();
}
//与后端请求代码，本功能不需要与后台交互所以省略
console.log("登陆成功");
});
},
//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
}
浏览器中的cookie信息如下图，注意这里的cookie的expire/Max-Age过期时间，这个时间是格林尼治标准时间GMT，世界统一的时间，GMT+8小时就是北京时间。(这里不做加密功能)
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我们编写js代码时经常遇到复杂逻辑判断的情况，通常大家可以用if/else或者switch来实现多个条件判断，但这样会有个问题，随着逻辑复杂度的增加，代码中的if/else/switch会变得越来越臃肿，越来越看不懂，那么如何更优雅的写判断逻辑，本文带你试一下。
/**
* 按钮点击事件
* @param {number} status 活动状态：1 开团进行中 2 开团失败 3 商品售罄 4 开团成功 5 系统取消
*/
const onButtonClick = (status)=>{
if(status == 1){
sendLog('processing')
jumpTo('IndexPage')
}else if(status == 2){
sendLog('fail')
jumpTo('FailPage')
}else if(status == 3){
sendLog('fail')
jumpTo('FailPage')
}else if(status == 4){
sendLog('success')
jumpTo('SuccessPage')
}else if(status == 5){
sendLog('cancel')
jumpTo('CancelPage')
}else {
sendLog('other')
jumpTo('Index')
}
}const actions = new Map([
[1, ['processing','IndexPage']],
[2, ['fail','FailPage']],
[3, ['fail','FailPage']],
[4, ['success','SuccessPage']],
[5, ['cancel','CancelPage']],
['default', ['other','Index']]
])
/**
* 按钮点击事件
* @param {number} status 活动状态：1 开团进行中 2 开团失败 3 商品售罄 4 开团成功 5 系统取消
*/
const onButtonClick = (status)=>{
let action = actions.get(status) || actions.get('default')
sendLog(action[0])
jumpTo(action[1])
} systemBranch: [
{ name: "姓名", stage: "realname", forms: "" },
{ name: "手机号", stage: "phone", forms: "" },
{ name: "性别", stage: "sex", forms: "" },
{ name: "所属园所", type: "leave", stage: "branchName", forms: "" },
{ name: "工号", stage: "code", forms: "" },
{ name: "员工状态", stage: "status", forms: "", type: "statay" },
{ name: "角色", type: "status", stage: "roleName", forms: "" },
{ name: "操作权限", type: "diction", stage: "branchName", forms: "" }
{ name: "姓名", stage: "realname", forms: "" },
{ name: "手机号", stage: "phone", forms: "" },
{ name: "性别", stage: "sex", forms: "" },
{ name: "所属园所", type: "leave", stage: "branchName", forms: "" },
{ name: "工号", stage: "code", forms: "" },
{ name: "员工状态", stage: "status", forms: "", type: "statay" },
{ name: "角色", type: "status", stage: "roleName", forms: "" },
{ name: "操作权限", type: "diction", stage: "branchName", forms: "" }
{ name: "姓名", stage: "realname", forms: "" },
{ name: "手机号", stage: "phone", forms: "" },
{ name: "性别", stage: "sex", forms: "" },
{ name: "所属园所", type: "leave", stage: "branchName", forms: "" },
{ name: "工号", stage: "code", forms: "" },
{ name: "员工状态", stage: "status", forms: "", type: "statay" },
{ name: "角色", type: "status", stage: "roleName", forms: "" },
{ name: "操作权限", type: "diction", stage: "branchName", forms: "" }
{ name: "姓名", stage: "realname", forms: "" },
{ name: "手机号", stage: "phone", forms: "" },
{ name: "性别", stage: "sex", forms: "" },
{ name: "所属园所", type: "leave", stage: "branchName", forms: "" },
{ name: "工号", stage: "code", forms: "" },
{ name: "员工状态", stage: "status", forms: "", type: "statay" },
{ name: "角色", type: "status", stage: "roleName", forms: "" },
{ name: "操作权限", type: "diction", stage: "branchName", forms: "" }
],
this.systemData.forEach(item => {
for (let a in data) {
if (item.stage === a) {
item.forms = data[a]; // 进行回显
}
}
})
//传给后台
this.listData.forEach(item => {
arrys[item.stage] = item.forms;
pledge = "1";
});