前端vue+elementUI如何实现记住密码功能
我们这回使用纯前端保存密码
既然是记住密码,前端也就是使用cookie保存,访问时用cookie读取
先来了解下cookie的基本使用吧
Cookie
所有的cookie信息都在document.cookie中存放着,是一个字符串,里面的cookie以分号和空格分隔。就像这样:
"key1=value1; key2=value2; key3=value3"
// 使用document.cookie 来获取所有cookie
docuemnt.cookie = "id="+value
操作cookie
/**
* 设置cookie值
*
* @param {String} name cookie名称
* @param {String} value cookie值
* @param {Number} expiredays 过期时间,天数
*/
function setCookie (name, value, expiredays) {
let exdate = new Date()
//setDate获取N天后的日期
exdate.setDate(exdate.getDate() + expiredays) //getDate() 获取当前月份的日 + 过期天数
document.cookie =name+"="+encodeURI(value)+";path=/;expires="+exdate.toLocaleString()
}
/**
* 获取cookie值
* @param {String} name cookie名称
*/
function getCookie (name) {
var arr = document.cookie.split(";") //转换数组
//["_ga=GA1.1.1756734561.1561034020", " mobile=123" password=456"]
for(var i=0;i<arr.length;i++){
var arr2 = arr[i].split('='); // ["_ga", "GA1.1.1756734561.1561034020"]
if(arr2[0].trim() == name){
return arr2[1]
}
}
}
/**
* 删除指定cookie值
* @param {String} name cookie名称
*/
function clearCookie (name) {
setCookie(name, '', -1)
}
/**
* 浏览器是否支持本地cookie
*/
function isSupportLocalCookie () {
let {name, value} = {name: 'name', value: 'mingze'}
setCookie(name, value, 1) //设置cookie
return getCookie(name).includes(value) //includes 判断数组name中是否含有当前value(返回true or false)
}
好了了解了cookie我们开始如何实现一个简单的记住密码功能
HTML代码
<el-form :model="ruleForm" :rules="rules"
status-icon
ref="ruleForm"
label-position="left"
label-width="0px"
class="demo-ruleForm login-page">
<h3 class="title">系统登录</h3>
<el-form-item prop="username">
<el-input type="text"
v-model="ruleForm2.username"
auto-complete="off"
placeholder="用户名"
></el-input>
</el-form-item>
<el-form-item prop="password">
<el-input type="password"
v-model="ruleForm2.password"
auto-complete="off"
placeholder="密码"
></el-input>
</el-form-item>
<el-checkbox v-model="checked" style="color:#a0a0a0;margin:0 0 20px 0">记住密码</el-checkbox>
<el-form-item style="width:100%;">
<el-button type="primary" style="width:100%;" @click="handleSubmit" :loading="logining">登录 </el-button>
</el-form-item>
</el-form>
vue代码
data(){
return {
logining: false,
checked: true
ruleForm: {
username: '',
password: '',
},
rules: {
username: [{required: true, message: '请输入您的帐户', trigger: 'blur'}],
password: [{required: true, message: '请输入您的密码', trigger: 'blur'}]
},
}
},
mounted() {
this.account() //获取cookie的方法
},
account(){
if(document.cookie.length <= 0){
console.log(this.getCookie('mobile'))
this.ruleForm.username = this.getCookie('mobile')
this.ruleForm.password = this.getCookie('password')
}
},
setCookie(c_name,c_pwd,exdate){ //账号,密码 ,过期的天数
var exdate = new Date()
console.log(c_name,c_pwd)
exdate.setTime(exdate.getTime() + 24 * 60 * 60 * 1000 * exdate) //保存的天数
document.cookie ="mobile="+c_name+";path=/;expires="+exdate.toLocaleString()
document.cookie ="password="+c_pwd+";path=/;expires="+exdate.toLocaleString()
},
getCookie(name){
var arr = document.cookie.split(";")
//["_ga=GA1.1.1756734561.1561034020", " mobile=123" password=456"]
for(var i=0;i<arr.length;i++){
var arr2 = arr[i].split('='); // ["_ga", "GA1.1.1756734561.1561034020"]
if(arr2[0].trim() == name){
return arr2[1]
}
}
},
clearCookie(){
this.setCookie("","",-1) //清除cookie
},
handleSubmit(){ //提交登录
this.$refs.ruleForm.validate((valid) => {
if(valid){
this.logining = true;
var _this = this;
if(_this.checked == true){
//存入cookie
_this.setCookie(_this.ruleForm.username,_this.ruleForm.password,7) //保存7天
}else{
_this.clearCookie();
}
Login({
mobile:_this.ruleForm.username,
password:_this.ruleForm.password
}).then((result) => {
console.log(result)
_this.$alert('登陆成功')
})
}
}
好了,这回的记住密码就到这里,小伙伴们一起努力吧 ^ 0 ^
总结
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