getItem(key,module_name){if(module_name){//特定模块let val =this.getItem(module_name);//通过递归的形式将特定模块的内容取出if(val)return val[key];//返回对应属性}returnthis.getStorage()[key];//在全部模块下找对应属性},
setItem(key,value,module_name){if(module_name){let val =this.getItem(module_name);val[key]= value;//赋值this.setItem(module_name, val);}else{//同级let val =this.getStorage();val[key]= value;window.sessionStorage.setItem(STORAGE_KEY,JSON.stringify(val));//写入}},