How do I read file i pick up from folder?

An app for pc exported with wj.js.

First step is to let user write and save a json file.(using ";" separator so i can after use tokenat)

Second step is let user pick this file (or another one has create before)

So , after i pick up the json file, how i can use it and set a textbox to first tokenat ?

If you want to save file with NWjs, better not use "Invoke download". Use NWjs-> Show Save dialog. On Save dialog OK -> NWjs Write File, put NWjs.ChosenPath in path field.

To read a file: NWjs Show open dialog, On open dialog OK - AJAX request URL, put NWjs.ChosenPath in URL field.