Spurious TS4094 "exported anonymous class type may not be private" error after upgrading from TS6 to TS7
Author: jedwards1211Created Sep 12, 2026Updated Sep 14, 2026
LabelsNeeds Investigation
Search Terms
TS4094, exported anonymous class, private, declaration
Version & Regression Information
- This changed between versions 6.0.3 and 7.0.2
⏯ Playground Link
https://github.com/jedwards1211/ts-4094-regression
Code
import ZodRoute from "zod-route-schemas";
import z from "zod";
export const organization = new ZodRoute(
"/org/:organizationId",
z.object({ organizationId: z.number() }),
);
Actual behavior
> tsc
src/index.ts:4:14 - error TS4094: Property 'parts' of exported anonymous class type may not be private or protected.
4 export const organization = new ZodRoute(
~~~~~~~~~~~~
src/index.ts:4:14 - Add a type annotation to the variable organization.
4 export const organization = new ZodRoute(
~~~~~~~~~~~~
src/index.ts:4:14 - error TS4094: Property 'typeHints' of exported anonymous class type may not be private or protected.
4 export const organization = new ZodRoute(
~~~~~~~~~~~~
src/index.ts:4:14 - Add a type annotation to the variable organization.
4 export const organization = new ZodRoute(
~~~~~~~~~~~~
I don't see what the problem is here, because as you can see below, the generated .d.ts would have the private field types from the class declaration in zod-route-schemas.
Expected behavior
Outputs the following .d.ts like TS5/6:
import ZodRoute from "zod-route-schemas";
import z from "zod";
export declare const organization: ZodRoute<"/org/:organizationId", z.ZodObject<{
organizationId: z.ZodNumber;
}, "strip", z.ZodTypeAny, {
organizationId: number;
}, {
organizationId: number;
}>, z.ZodType<{
organizationId: number;
}, any, {
organizationId: number;
}>, z.ZodType<{
organizationId: number;
}, any, {
organizationId: number;
}>>;
//# sourceMappingURL=index.d.ts.map
Additional information about the issue
Doesn't happen with "module": "preserve", but happens with "commonjs", "nodenext", maybe others
ZodRoute declaration in zod-route-schemas/index.d.ts:
declare class ZodRoute<Pattern extends string, Schema extends SchemaForPattern<Pattern>, FormatSchema extends InvertSchema<Schema> = InvertSchema<Schema>, PartialFormatSchema extends PartialSchema<FormatSchema> = PartialSchema<FormatSchema>> {
readonly pattern: Pattern;
readonly schema: Schema;
private parts;
readonly formatSchema: FormatSchema;
readonly partialFormatSchema: PartialFormatSchema;
readonly exact: boolean;
private typeHints?;
Source: microsoft/TypeScript