JS help needed for date fields

[techtr]

Hi everyone, I have field_440 and field_441 both on the same entity and on the same form. Before submitting, Before saving the form, I want to check if date of field_441 is MIN field_440 (field_441=>field_440) and if it is, warn the user and disable save. Is that possible by JS and a help on code if possible? Thank you very much.

[support]

You can find an example here https://docs.rukovoditel.net/index.php?p=113#onSubmit

[techtr]

I was able to use these for several scenarios. Thank you.