How to create schema from GraphQL File for GraphiQL?

[vedantroy]

In production, we disable introspection. But I'd still like to get auto-complete inside of GraphiQL.

As expected, server has access to the .graphql file. Is there a way to convert that into a schema, which I can send back to the client, so GraphiQL can have autocomplete?

For context, we're serving GraphiQL as a single HTML file.

Like this:

        ReactDOM.render(
          React.createElement(GraphiQL, { fetcher: fetcher}),
          document.getElementById('graphiql'),
        );

[eins78]

You can give the schema as a prop (then no introspection will be done).
According to the docs the expected type is GraphQLSchema, so you might need to first convert the schema.graphql text file, for example using buildschema from the graphql js package https://graphql.org/graphql-js/utilities/#buildschema.