Generating JavaScript isn't hard, so if you're using a lot of forms that require validation, it should be pretty straightforward to generate JavaScript and back

Generating JavaScript isn't hard, so if you're using a lot of forms that require validation, it should be pretty straightforward to generate JavaScript and back-end validators from the same description. Still, you have to use some ruleset and hope it covers all your cases, etc. If you only have 1 or 2 forms, it's probably just easier to do it manually...