I use SessionStorage to store information about selected items to pack. So I have a number of keys like (pack01, pack02, pack07, pack22, etc), but there are also other keys in the SessionStorage too.

I would like to write a function to iterate through all keys that the name starts with (pack) - only these ones.

Sample objects in SessionStorage:

pack01: [{"pack_items":1,"pack_name":"testname1"}] 
pack02: [{"pack_items":2,"pack_name":"testname2"}] 
test: test

Code so far:

for (let i = 0; i < sessionStorage.length; i++) {
      const key = sessionStorage.key(i);
      if(sessionStorage[key].hasOwnProperty('pack_items')){
          console.log(sessionStorage[key]['pack_items']);
      }
      else {
        console.log('FALSE');
      }
      console.log(`${key}: ${sessionStorage.getItem(key)}`);
}

Any advice? Thank you