nodejs module.js:340 error: cannot find module

Question

I installed nodejs in C:\Program Files (x86)\nodejs

then I created a .js file and saved it in my desktop just to output 'hello world' in the console:

console.log('hello world'); 

When I tried to run the file from the command prompt:

C:\Users\Laura>cd desktop C:\Users\Laura\Desktop>node nodeTest.js 

I get:

module.js:340 throw err;       ^ Error: Cannot find module 'C:\Users\Laura\Desktop\testNode.js' at Function.Module._resolveFilename (module.js:338:15) at Function.Module._load (module.js:280:25) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:901:3 

I read many other related questions, and some of them recommend to run the install, and so I did.

C:\Users\Laura>npm install -g express 

But no luck, still getting the same error message.

Answer 1

EDIT: This answer is outdated. With things like Yarn and NPM 5's lockfiles it is now easier to ensure you're dependencies are correct on platforms like Heroku

I had a similar issue related to node_modules being modified somehow locally but the change was not reflect on Heroku, causing my app to crash. It's relatively easy fix if this is your issue:

# Remove node_modules rm -fr node_modules  # Reinstall packages npm i  # Commit changes git add node_modules git commit -m 'Fix node_modules dependencies.' git push heroku master 

Hope that helps for others with a similar issue.