Hi 
,
The Next.js frontend is more or less type-safe. As you know, Strapi allows you to request only specific fields (e.g., slug and title) via the ‘populate’ parameter in the query URL, even if the content-type has many more fields.
However, the generated types always include all possible fields of the content-type, regardless of what you request in your query!
So while you have the complete type information, the actual data you receive may not include all fields. If you need 100% type safety, I would recommend using GraphQL.