Migrate legacy res.redirect('back') and res.location('back')
Migrates usage of the legacy APIs res.redirect('back') and res.location('back')
to use the recommended approach of accessing the Referer header directly from
the request object. Versions of Express before 5 allowed the use of the string
"back" as a shortcut to redirect to the referring page, but this has been
deprecated.
Example
Migrating res.redirect('back')
The migration involves replacing instances of res.redirect('back') with res.redirect(req.get('Referer') || '/').
Migrating res.location('back')
The migration involves replacing instances of res.location('back') with res.location(req.get('Referer') || '/').