Custom error in case Not Found

[Вадим Бударин]

node.js version: 11.0.0

npm/yarn and version: 6.4.1

koa-router version: 7.4.0

koa version: 2.6.2

Code sample:

Expected Behavior:

Actual Behavior:

Additional steps, HTTP request details, or to reproduce the behavior or a test case:

I want to have custom error mesage in case when route is not found in router.
How could I achieve this?

Thanks

[EarthFeng]

const Router = require('koa-router');
const router = new Router();
router.get('/exist',middleware);

// Need put last.
router.all('*', (ctx) => {
  ctx.body = 'Not found Custom';
  ctx.status = 404;
  return ctx;
});

[Вадим Бударин]

thanks