I had an API route and after responding to a form submit, the API called
res.redirect('/')
It worked great locally in development, but when I shipped it to Vercel, the redirect ended up to a blank page. The URL was correct, but it took a refresh to show the content.
Not sure why, but I fixed this by using res.writeHead()
instead:
res.writeHead(302, { Location: '/' }).end()
The
302 Found
HTTP code is a common way of performing URL redirection.