Declaration emit of private properties should strip jsdoc

🔎 Search Terms

jsdoc dts declaration emit private properties property

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

https://www.typescriptlang.org/play?#code/KYDwDg9gTgLgBAYwDYEMDOa4DEITgbwCg4S4B6AKgrgBUALAS0ybhTjAFcAjJBhOALbAYdCABMAdHAplipTjz7tuvBAFlhosQAoAlAQC+hOSUrV6LFmzBQGANxQxggzeIA0rAHZi4AdwZISHBczmgwtmBgwD4MnnAizmLAyChQjgwQcQBmAcBSMibstg5ORfaOwBoi4nqGhAZAA

💻 Code

export class Foo {
    /** This is a public method. */
    public publicMethod() {}

    /** This is a private method, and will be stripped in the declaration file. */
    private privateMethod() {}
}

🙁 Actual behavior

export declare class Foo {
    /** This is a public method. */
    publicMethod(): void;
    /** This is a private method, and will be stripped in the declaration file. */
    private privateMethod;
}

Note the jsdoc on the private method.

🙂 Expected behavior

export declare class Foo {
    /** This is a public method. */
    publicMethod(): void;
    private privateMethod;
}

Additional information about the issue

It sure seems like this info should be stripped; after all, the type information is gone, leaving only a marker to inform child classes.

This causes TypeScript's own dts files to be filled with private method jsdoc. https://github.com/microsoft/TypeScript/pull/57492/files#r1559884318

Start with the Playground Link and reproduce the declaration emit shown in the issue. Trace TypeScript's declaration emit handling for private properties, then verify that the private property's JSDoc is omitted while the private marker remains in the generated declaration output.