How to disable submission or revert to initValue the CardSettingsText() ?
How to disable submission or revert to initValue the cardsettingstext? When input value is not valid , submission still works. I have a situation when input text should not empty, but after validation the submission still works and as result the inputfield stays empty.
Are you checking for empty string also in your validation?
yes,

i think, i can do this with extra textfieldcontroller , but would be nice if there would be some inbuilt 'on invalid submit' mechanics. For example the textfield returns to initial value or the submit button is blocked. I added an extra focus request to hold the textfield in edit mode.