Swagger doesn't work when I build in Javascript instead of Typescript | NestJS | Page 1

I use a library that doesn't have types then I'm building backend with nestjs app using JS instead of TS and for swagger I do the same that I do in apps wrote in TS however it doesn't show the routes, only the title

  const options = new DocumentBuilder()
    .setTitle('Example api')
    .setVersion('0.1.0')
    .build();

  const document = swaggerModule.createDocument(app, options);

  SwaggerModule.setup('api/docs', app, document);

do I need to do something else with JS?

I have here the minimal repo https://github.com/dancespiele/nest-swagger-javascript-starter however in this case I get this error:

/home/spielrs/Proyectos/javascript-starter/node_modules/@nestjs/swagger/dist/swagger-scanner.js:49
        const denormalizedArray = [...routes.values()].map((ctrl) => this.explorer.exploreController(ctrl, applicationConfig, modulePath, globalPrefix, operationIdFactory));
                                             ^

TypeError: Cannot read properties of undefined (reading 'values')

it looks like swagger cannot detect routes

GitHub

GitHub - dancespiele/nest-swagger-javascript-starter

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#Swagger doesn't work when I build in Javascript instead of Typescript