How do I resolve "Cannot find module" error using Node.js?
I had a very similar issue. Removing the entire node_modules
folder and re-installing worked for me:
rm -rf node_modules
npm install
Using npm install
installs the module into the current directory only (in a subdirectory called node_modules
). Is app.js located under home/dave/src/server/
? If not and you want to use the module from any directory, you need to install it globally using npm install -g
.
I usually install most packages locally so that they get checked in along with my project code.
Update (8/2019):
Nowadays you can use package-lock.json file, which is automatically generated when npm modifies your node_modules directory. Therefore you can leave out checking in packages, because the package-lock.json
tracks the exact versions of your node_modules, you're currently using. To install packages from package-lock.json
instead of package.json
use the command npm ci
.
Update (3/2016):
I've received a lot of flak for my response, specifically that I check in the packages that my code depends on. A few days ago, somebody unpublished all of their packages (https://kodfabrik.com/journal/i-ve-just-liberated-my-modules) which broke React, Babel, and just about everything else. Hopefully it's clear now that if you have production code, you can't rely on NPM actually maintaining your dependencies for you.