Endpoints - support form submissions for noscript and fetch users alike

[tmaxmax]

I am developing a website that must support users without Javascript - this means that I must ensure HTML forms work properly without any enhancements. This raises a problem: all my endpoints are designed as part of a REST API, so they return JSON, but when working with basic HTML forms only, the server must handle redirections and respond with actual HTML.
How would you approach this? Do I need to make two endpoints for the same resource? Or am I misunderstanding something, and this is not a real problem? Thank you for your help!

[maxicarlos08]

What I did was add an additional source=form query parameter to the form action, so I could return a redirect redirect to some results page when using a non-javascript form

[geoffrich]

The SvelteKit starter app does this via an enhance action on the form. If JS is enabled, then the enhance action runs and submits the form via fetch. Otherwise, it does a regular form submit.

In the /form endpoint, it detects if the submission was via fetch or regular form submission. If it was a regular form submission, then it performs a redirect instead of returning JSON.

You can see further discussion on this issue: #1203 (comment).