Express middleware: res.statusCode doesn't accurately return the status code

Question

I have a fairly straight forward logging middleware function in an Express JS app:

app.use(function (req, res, next) {
  const line = `${req.method} ${req.originalUrl} ${res.statusCode}`
  console.log(line)
  next()
})

And I have this route:

this.app.use('/404', function (req, res) {
  res.sendStatus(404)
})

Which logs the following:

GET /404 200

With other routes it seems to always return 200.

How can I fix this so that it accurately logs status codes without changing routes?

Edit

My goal here was something quick to tell me if a route was hit and whether or not it succeeded. I don't want to have to edit all my routes to be compatible with it since I'll eventually replace it with an actual logging solution.

Answer 1

This still doesn't work for all routes but works for more of them:

this.app.use(async function (req, res, next) {
  await next()
  const line = `${req.method} ${req.originalUrl} ${res.statusCode}`
  console.log(line)
})