Polka always running onError handler

I am using polka v0…5.0 and here is my code

import polka from 'polka';

const httpserver = polka({
        onError: (e) => {
          console.log('Error handling request');
          console.log(e);
           }
      });
 httpserver.get('/', (req, res) => {
      console.log('Request received');
      res.end('Hello World!');
    })
 httpserver.listen(3000, err => {
   if(err) {
    console.log(err);
   }
  })

When I access the route ‘/’, I can see “Request received” in terminal and “Hello world” in browser but Polka is also running onError handler each time I access ‘/’ route with error 404. Why polka is running onError handler even there is no un-handled exception in route handler.

[zolotokrylin]

Thank you, Luke.

[lukeed]

Hi @zolotokrylin,

You’re creating an Error object but you never throw it. It’s like new Cat but never assigning it to a variable.

You should check out these docs for info