how to fix "can't read property push of undefined" error in Nodejs?

In genres.js, you should import

const router = express.Router();

instead of

const router = express.Router;

Also, the error you mention could be from any push in your code (without any more info), please specify the stacktrace next time :)

javascript node.js express push

Use const router = express.Router() instead of const router = express.Router.

javascript node.js express push

It can be wrong variable name :)

I made a mistake due to intelligence in my quick sample -

Typically signature of a ReST call isrouter.get("/something", (req: any, res: any, next: any) => {response.write("test");response.end();});

Here if you will notice I was using response where as i was suppose to use res

Moreover ensure you have registered your routes usingapp.use(router);