Where does “Save State” puzzle save in memory?

hi
there was discussion about this a bit ago regarding a wordpress feature for saving client progress on a configurator.

I made the comment that it shouldn’t be too hard to get the saved state info and put it to a json file or url and have that saved as text somewhere on server or local machine.

now i’m trying to figure it out and maybe i spoke too soon.

is there a direct place we can point to to use the save file feature in order to save objects and variables states (like undo state) and have it in a file for later loading?

thanks!