.save()

Writes the cached data into the JSON file.

This method must be used if you set autoSave to false when creating the database, otherwise you should not use it.

save()

db.toJSON(); // { counter: 17 }

db.add('counter', 3); // 20

db.get('counter'); // 20 (cached only)
db.fetch('counter'); // 17

db.save();

db.get('counter'); // 20 (cached and written in the JSON file)
db.fetch('counter'); // 20