nextjs _middleware not console.log

Question

I have followed the guideline to insert a middleware into one of my pages.

in the sub directory /appstore I have created _middleware.js inside that I am trying to just get something to console log so I know the file is working.

The end result will be that I want to detect if they are android or iOS and redirect them to the correct store.

import { NextFetchEvent, NextRequest } from 'next/server'

export function middleware() {
  console.log('Hello, world!')
}

However when I visit the page I get in console.log = NULL so clearly something is not quite right?

Where are you looking for the console.log? The output should appear in the terminal where you started the Next.js dev server. — juliomalves
– juliomalves, Commented Dec 14, 2021 at 22:37

TheodorosPloumis · Accepted Answer · 2022-12-21 14:13:40Z

9

Since the middleware works server side you can see the console.log() results only on the terminal where you execute the npm run dev or npm run start command.

It will display nothing on the client (browser console).

Just for reference, adding the Documentation for the next/server server-only helpers.

answered Dec 21, 2022 at 14:13

TheodorosPloumis

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1 Comment

gcb Aug 18 at 21:01

this have nothing to do with the absense of browser's console.log... but the absense of node.js' console.log(), which is lame. middleware run on a broken engine that is a subset of node.js, and vercel didn't think that the ability to log to syslog/terminal was a good feature to implement.

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