Ill try to do what Hadien said. It's a bit out of my level to understand but looks simple.
This is the page I have so far. I want to be able to select items to make the edit and delete functions. There are also buttons to sort by name, id, rating etc. Then there is a save and load button that sends the arr_items to localStorage so it doesn't dissapear ever time the page is refreshed (those already work).