How to add multiple NODE_PATH in package.json?

Question

How do I add multiple NODE_PATH in package.json?

I want to have these multiple paths:

NODE_PATH=./ NODE_PATH=./modules/

or

NODE_PATH=./lib NODE_PATH=./modules/

package.json:

{ "name": "my-app", "description": "env", "repository": "https://github.com/xxx.git", "scripts": { "dev": "NODE_PATH=./lib NODE_PATH=./ node server.js", "start": "cross-env NODE_ENV=production NODE_PATH=./ NODE_PATH=./modules/ nodemon --exec babel-node --presets es2015 server.js" }, "dependencies": { "cross-env": "^5.0.5", "express": "^4.15.4" }, "license": "MIT" }

server.js:

'use strict' import express from 'express' import sample from 'lib/sample' import config from 'lib' const app = express() const isProd = (process.env.NODE_ENV === 'production') const port = process.env.PORT || 3000 console.log(isProd) console.log(sample) console.log(config) app.get('/', function (req, res) { const data = {message: 'Hello World!'} console.log(data); return res.status(200).json(data); }) app.listen(port, function () { console.log('listening on port 3000!') })

Error:

Error: Cannot find module 'lib/sample'

Any ideas?

Patrick Hund · Accepted Answer · 2017-08-26 09:13:08Z

The way you are using NODE_PATH in your example, by setting it twice, you are overwriting the writing the value you assign first with the second time.

Instead, set NODE_PATH to multiple paths, delimited by colons (on MacOS or Linux) or semicolons (Windows), like this:

{ "name": "my-app", "description": "env", "repository": "https://github.com/xxx.git", "scripts": { "dev": "NODE_PATH=./lib:./ node server.js", "start": "cross-env NODE_ENV=production NODE_PATH=./:./modules/ nodemon --exec babel-node --presets es2015 server.js" }, "dependencies": { "cross-env": "^5.0.5", "express": "^4.15.4" }, "license": "MIT" }

See Node.js documentation:

https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders

For windows, you would need to add semi colons (;) instead of colons (:)

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