// Storage 封装constSTORAGE_KET='mall'exportdefault{
// 存储值setItem(key,value,module_name){
if(module_name){
let val =this.getItem(module_name);
val[key]= value;this.setItem(module_name, val);}else{
let val =this.getStorage();
val[key]= value;
window.sessionStorage.setItem(STORAGE_KET,JSON.stringify(val))}let val =this.getStorage();
val[key]= value;
window.sessionStorage.setItem(STORAGE_KET,JSON.stringify(val))},// 获取某一个模块下面的属性 user 下面的 userNamegetItem(key,module_name){
if(module_name){
let val =this.getItem(module_name);if(val)return val[key];}this.getStorage()[key]},getStorage(){
returnJSON.parse(window.sessionStorage.getItem(STORAGE_KET)||'{}')},clear(key,module_name){
let val =this.getItem();if(module_name){
delete val[module_name][key];}else{
delete val[key];}this.setItem(STORAGE_KET,val)}}