ESP12-F saving variable

Hi MaBe, thank you for your advise!
above two links were tested on ESP12-F + "v1.95 4Mb" scatch. Unfortunately:

Flash.getFree()
Uncaught ReferenceError: "Flash" is not defined

and

var f = new (require("FlashEEPROM"))();
Uncaught Error: Module "FlashEEPROM" not found

In final I got "sunny night" and found one solution that was tested and passed:
step 1) write in the left side of Web IDE two lines:

function getName(){return "NR.3";}
save();

simple call getName() returns NR.3 even after power reset. Perfect begin!

step 2) function was changed like below:

function getName(){return "NR.12";}
save();

reboot by power and call getName() ruturns NR.12 now!

Hope it will work for long time. Anyway, I will glad to get yours better ideas.

Thank you, Mike