在vue中使用cookie记住用户上次选择的实例(本次例子中为下拉框)

//设置cookie
    setCookie(projectId,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="projectId"+ "=" +projectId+";expires="+exdate.toGMTString();
    },
    //读取cookie
    getCookie:function () {
    console.log(document.cookie);
    let me=this;
    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]=='projectId'){
        me.workhourData.projectId=arr2[1];//保存到保存数据的地方
      }
      }
    }
    },
    //清除cookie
    clearCookie:function () {
    this.setCookie("","",-1);//修改2值都为空，天数为负1天就好了
    },

//上方引入的index.js
import axios from 'axios'
import {baseUrl} from "./config";
import $ from 'jquery'
import './base'

export const getAccount=()=>{
  return axios.post(`${baseUrl}/index/index/index`).then(res=>{
    return res.data;
  })
}

//config.js
export const baseUrl='http://shagua.com';
//base.js
import axios from 'axios';
import qs from 'qs';
import router from '../../router'

axios.defaults.withCredentials=true; //允许跨域发送cookie
axios.defaults.transformRequest = [function(data) { //解析post数据
 if(typeof data=='object'){
 return qs.stringify(data);
 }else{
 return data;
 }
  
}];

axios.defaults.transformResponse=[function(data){ //拦截response请求，做统一跳转
 data=JSON.parse(data);
 if(data.status=='-99'){
 router.push({path:'/login'});
 }
 return data;
}];

//跨域访问的时候才会存在此字段
$origin = isset($_SERVER['HTTP_ORIGIN']) ? $_SERVER['HTTP_ORIGIN'] : '';
 
$allow_origin = array(
  'http://localhost:8080',
);
 
if(in_array($origin, $allow_origin)){
  header('Access-Control-Allow-Credentials: true');
  header("Access-Control-Allow-Headers: *");
  header('Access-Control-Allow-Origin:'.$origin);
  header('Access-Control-Max-Age:3600');
}