const
   
  strorageSelectedFilter
   
  =
   
  localStorage
  .
  getItem
  (
  selectedFilter
  );
 

 

   
  if
   (
  strorageSelectedFilter
  ){
 

 

   
  const
   
  strorageFilter
   
  =
   (
  _
  .
  values
  (JSON.
  parse
  (
  strorageSelectedFilter
  )));
 

localStorage是string| null。 

JSON.parse需要的事string类型

只要判断一下不为null。再操作