A type guard for vals that expect a WebApi Request
as the first parameter.
Since a val can be invoked by run, web, express or even email, the correct type for a web endpoint should be req?: Request | unknown
.
By using this type guard and handling the false
case, all later code can safely access the request:
export const myVal = (req?: Request | unknown) => {
if (!@karfau.isRequest(req)) {
return `This val has to be used with the web endpoint, see ${@neverstew.thisValUrl()}`;
}
if (req.method === 'GET') {
}
}