Express routes invoking multiple router function

Question

I've created a NodeJS Express app. But my express route is invocking multiple routes function, one after another, but I only need one at a time.

My express app.js

app.use(routes)

Express router:

const router = express.Router();

router.post("/product", controller.productFunction)
router.post("/user", controller.userFunction)
router.get("/:id", idController.getId)

Whenever I create a post request for "/product" route, first the productFunction is invocked, but then the "/:id" routes getId function is also get invocked. Same thing happen for /user route as well. Always /:id route is getting invocked. Is there any way to prevent this?

I even tried this way, but after the homepage loading then again it invockes getId function.

app.get("/", (req, res, next) => {
  res.sendFile(..........);
});

app.use(routes);

Answer 1

I am sure that this is not an issue with the router itself.

You can't skip from POST to GET handling. So invocations are caused by different requests.

router.get("/:id", idController.getId) kind of wild card, and <server_url>/favicon.ico will trigger it If you check it via browser it tries to get favicon or smth else and invokes this handler.

Try to make POST request via curl/Postman and idController.getId should not be called.

It is risky to serve static and process requests on a same level. You can add some prefix to all your request, like that app.use('/api', routes); then static file will be available on /<file_name> and all server logic will be under /api/<request>