/*用export把方法暴露出來*/
/*設置cookie*/
export function setCookie(c_name,value,expire) {
 var date=new Date()
 date.setSeconds(date.getSeconds()+expire)
 document.cookie=c_name+ "="+escape(value)+"; expires="+date.toGMTString()
 //console.log(document.cookie)
}
/*獲取cookie*/
export function getCookie(c_name){
 if (document.cookie.length>0){
 let c_start=document.cookie.indexOf(c_name + "=")
 if (c_start!=-1){ 
 c_start=c_start + c_name.length+1 
 let c_end=document.cookie.indexOf(";",c_start)
 if (c_end==-1) c_end=document.cookie.length
 return unescape(document.cookie.substring(c_start,c_end))
 } 
 }
 return ""
}
/*刪除cookie*/
export function delCookie(c_name){
 setCookie(c_name, "", -1)
}

methods:{
 submit(){
 setCookie('username',username,1000*60)
 axios.get('http://172.16.2.43:8080/static/data/mt_index.json').then((res)=>{ 
 this.$router.push({
 path: '/user', query:{userid: $("input[name='username']").val()}
 }); 
 //this.setuserid($("input[name='username']").val()); 
 }) 
 }
}

<div class="topheader">
 <span class="location fl">北京</span>
 <div class="search-box">
 <a href=""><input type="text"></a> 
 </div>
 <span class="mine" @click="jampmin">我的</span>
</div>
jampmin(){
 //獲取cookie值
 var username=getCookie('username');
 if(username==''||username=='undefind'){
 this.$router.push({
 path: '/login'
 });
 }else{
 this.$router.push({
 path: '/user'
 });
 } 
} 

 <p @click="signout()" class="signout">退出</p>
signout(){
 /*刪除cookie*/
 delCookie('username');
 this.$router.push({
 path: '/index'
 });
}