how to do npm install

[zsszatmari]

Dear Developers,

It's not clear to me how to 'require' a module.
For example, in Terminal.app I cd into the 'public' directory (which contains index.html), and do an

npm install hash.js

I add require('hash.js') to index.html. Then when I compile&run, I get "undefined:40: Error: No such native module hash.js."
The same with any other module.
I checked and the module is copied by Xcode to ./Contents/Resources/public/node_modules/hash.js in the .app.

Thank You for your help!