Form Validation with Schema in TypeScript

        const Positive = Schema.Number.pipe(
            Schema.filter((n) => (n > 0 ? undefined : "must be positive")),
        );

        const MyStruct = Schema.Struct({
            name: Schema.NonEmpty,
            x: Positive,
        });

        const result = Schema.decodeUnknownEither(MyStruct)({
            name: "hello",
            x: -11,
        });

{ readonly name: NonEmpty; readonly x: { number | filter } }
    └─ ["x"]
       └─ { number | filter }
          └─ Predicate refinement failure
             └─ must be positive