Vanilla JS: Mixins break inherited type hints

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.84.2
• OS Version: Windows 10

The issue is quite simple, as shown below, mixins break inherited type hints. exampleMethod() below should have hint references for this.myStr and this.propIsHinted but does not.

Apologies if this belongs somewhere else like the typescript repo, it's vanilla JS but it's probably related to typescript/JSDoc functionality.

function NumberMixin( Base ) {

	return class NumberMixin extends Base {

		/** @type {number} */
		myNum;

	};

}

function StringMixin( Base ) {

	return class StringMixin extends Base {

		/** @type {string} */
		myStr;

	};

}

class MyBase {

	/** @type {boolean} */
	propIsHinted;

}

class SuperClass extends NumberMixin(StringMixin(MyBase)) {

	exampleMethod() {

		// Hinted
		this.myNum;

		// Not hinted
		this.myStr;

		// Not hinted
		this.propIsHinted;

	}

}

Run the provided JavaScript mixin example in the TypeScript or VS Code context to reproduce the missing hints. Start by tracing JSDoc type inference for inherited classes and nested mixins; done means exampleMethod() provides hints for myNum, myStr, and propIsHinted.