How do I save and recall meta data with a save game?

Hi there, hoping someone can answer this as it's probably super simple and relentless searching has turned up nothing.

I'd like to save a game to one of three slots, and alongside it save the name of the layout, the players health and the time played. So that when the players goes to load a game they can see the three slots with the Layout Name, Health and Time displayed.

How do I do this?

I think I'm getting a little further in this. So I am saving the data required into an array. How do I then save this array back to the JSON?

You will have to save this data to Local Storage.

Check out this demo:

howtoconstructdemos.com/saving-and-loading-system-with-multiple-save-slots