The best solution is to use HTMX (or similar) to hook into your server-side validation so that you only have validation code one place (on the server), but you

The best solution is to use HTMX (or similar) to hook into your server-side validation so that you only have validation code one place (on the server), but you don't have to wait for complete form submission before finding an error in a field. Example: https://htmx.org/examples/inline-validation/ https://htmx.org/examples/inline-validation/