A solution to Property of exported anonymous class type may not be private or protected.

[denis-migdal]

🔎 Search Terms

Property of exported anonymous class type may not be private or protected

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________

⏯ Playground Link

No response

💻 Code

export function foo() {

        return class X {
                protected foo() {}
        }
}

🙁 Actual behavior

test.ts:1:17 - error TS4094: Property 'foo' of exported anonymous class type may not be private or protected.

1 export function foo() {
                  ~~~


Found 1 error in test.ts:1

🙂 Expected behavior

In the .d.ts file, just add a temporary class to remove this bug...

Additional information about the issue

This bug was signaled ~6 years ago, but was closed: #30355

The following works:

class X {
        protected foo() {}
}

export function foo() {

        return X;
}

It produces this .d.ts :

declare class X {
    protected foo(): void;
}
export declare function foo(): typeof X;
export {}

So for our case, just create a temporary class outside of foo() and use it...

declare class foo__internals__X {
    protected foo(): void;
}
export declare function foo(): typeof foo__internals__X;
export {}

[MartinJohns]

Duplicate of #36060.