[What's New in RxJS 7] How EmptyError is created in RxJS #blog #rxjs

rxjs-7_createErrorClass.ts

export const EmptyError: EmptyErrorCtor = createErrorClass(
  _super =>
    function EmptyErrorImpl(this: any) {
      _super(this);
      this.name = "EmptyError";
      this.message = "no elements in sequence";
    }
);