node.js, Error: Cannot find module 'express'

Question

I am new to Node.js, try to learn express to build my first web application. I got stuck on my very first sample code and need some help to get it running. Before I post th

Answer 1

I've came across a similar problem and in the end it was a matter of some old dependencies that were messing up my Heroku server.

While at my project's folder I've run:

npm uninstall
npm install

I hope it helps

Answer 2

Have you tried

npm install

If you're specifically looking for just express

npm install --save express

Answer 3

It says

 Cannot find module 'express'

Do you have express installed?If not then run this.

 npm install express

And run your program again.

Answer 4

 npm install --save express   

This worked for me, Just run express.js installation again

Answer 5

In rare cases, npm cache may get corrupt. For me, what worked was:

npm cache clean --force

Generally, the package manager will detect corruption and refetch on its own so this is not usually necessary. However, in my case Windows 10 crashed a few times and I suspect this may have been during a fetch operation. Hope it helps someone!

More information: https://docs.npmjs.com/cli/cache

Answer 6

Run npm install express body-parser cookie-parser multer --save command in the same directory with your source code nodejs file to resolve this issue. P/s: check your directory after run command to understand more!