internal/modules/cjs/loader.js:582 throw err

Question

Recently I started learning Node.js with express. I have tried express router which threw an error. The bigger issue is what caused this and how can I avoid it again. This problem makes me worry and discourages me to learn node.js.

Here is the error. What do I need to do?

internal/modules/cjs/loader.js:582
    throw err;
    ^

Error: Cannot find module 'C:\Users\User\Desktop\NodeJsProject\app.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:580:15)
    at Function.Module._load (internal/modules/cjs/loader.js:506:25)
    at Function.Module.runMain (internal/modules/cjs/loader.js:741:12)
    at startup (internal/bootstrap/node.js:285:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3)

Answer 1

I had the same issue when I first tried on node js.
I noticed this issue was happening to me because I had some .js files with same names in different directories, which were in the same main directory.
I created another directory outside the main project folder, and created a .js file.
After that, it ran fine.
ex- app.js

Answer 2

1. Delete the node_modules directory
2. Delete the package-lock.json file
3. Run npm install
4. Run npm start

OR

rm -rf node_modules package-lock.json && npm install && npm start

Answer 3

What helped me was to place the .js file that I was working with in a new folder, drag and drop that folder into VS Code (to open the directory directly in VS Code), open the terminal in VS Code, and then simply type node <filename>.js (or in my case node index.js).

I had already installed node on my system, but for whatever reason, I was still getting the error that you've mentioned, even when I typed the direct path to the file i.e. node /desktop/index.js.

So, creating a new folder on my desktop, placing the .js file inside that folder, opening that folder within VS Code, and then typing node index.js in the terminal solved my issue.

Answer 4

Replace your file name in package.json ({"npm": <your server code file name>.js}) with that file where your server code is running (it should be app.js, main.js, start.js, server.js, or whatever you picked up).

Answer 5

I was having the same error because I had a space at the end of my filename(not the reference but the actual filename). Once I changed 'app.js ' to 'app.js' it worked fine.

Answer 6

i was in the sub folder of the application and it was throwing that error. going to main directory of application resolved my issue.