Incompatible with Apollo GraphQL Sandbox? about gql HOT 2 CLOSED

let res: Response

if(pathname === '/graphql') {
  res = req.method === 'OPTIONS'
    ? new Response(undefined, { status: 204, headers: { Allow: 'OPTIONS, GET, POST' }})
    : await GraphQLHTTP<Request>({
        schema,
        graphiql: true
      })(req)
} else {
  res = req.method === 'OPTIONS'
    ? new Response(undefined, { status: 204, headers: { Allow: '*' }})
    : new Response('Not Found', { status: 404 })
}

res.headers.append('access-control-allow-origin', '*')
res.headers.append('access-control-allow-headers', 'Origin, Host, Content-Type, Accept')

return res