next 15 right @Field Sparrow

yep

can you tell me why they made the action attriubte compulsory in next forms

i can't get a response from the server action back

i would rather just use an onSubmit

It looks here https://nextjs.org/docs/app/api-reference/components/form like a combination of action="" (empty string) and setting preventDefault in the onSubmit handler might do what you want?

The empty string doesn't make it do nothing, but it might be the simplest thing to set it as if you have no intention of using that behaviour