How to add multiple NODE_PATH in package.json? - node.js

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?

Answer 1

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