Once you have installed a package in
node_modules, you can use it in your code.
Using unscoped packages in your projects
If you are creating a Node.js module, you can use a package in your module by passing it as an argument to the
var lodash = require('lodash');
var output = lodash.without([1, 2, 3], 1);
package.json, list the package under dependencies. You can optionally include a semantic version.
Using scoped packages in your projects
To use a scoped package, simply include the scope wherever you use the package name.
var projectName = require("@scope/package-name")
Resolving "Cannot find module" errors
If you have not properly installed a package, you will receive an error when you try to use it in your code. For example, if you reference the
lodash package without installing it, you would see the following error:
Error: Cannot find module 'lodash'
- For scoped packages, run
npm install <@scope/package_name>
- For unscoped packages, run
npm install <package_name>