NODE_ENV is undefined even set Up was done properly

Question

I have a util/config.json file like below:

{
"dev": {
    "db": {
        "host": "localhost",
        "user": "root",
        "pass":"*****"

      },

    "json_indentation": 4,
    "database": "my-app-db-dev"
}
"prod":{
    "db": {
        "host": "somethingt",
        "user": "root",
        "pass":"****"

      },

    "json_indentation": 4,
    "database": "my-app-db-dev"
}

}

from a util/config.js file, I have exported it to my app.js

const config = require('./config.json')
const environment = process.env.NODE_ENV || 'dev'

const defaultConfig = config.environment;
console.log(defaultConfig)  // shows undefined why?
module.exports = defaultConfig

app.js is like so:

const express = require('express')
const config = require('./util/config')

but it my defaultConfig shows undefined and can't fetch the data for dev ( npm run dev in app.js directory ) while I have set the NODE_ENV variable like this in my package.json:

"scripts": {
        "dev": "set NODE_ENV=dev && nodemon app.js",
        "prod": "set NODE_ENV=prod && nodemon app.js"
    }

Answer 1

You can try following snippet

const config = require('./config.json')
const environment = process.env.NODE_ENV || 'dev'

const defaultConfig = config[environment];
console.log(defaultConfig)  // shows undefined why?
module.exports = defaultConfig

Answer 2

const defaultConfig = config.environment; searches an 'environment' string key in the config .

Try const defaultConfig = config[environment]; to search for the value of the environment variable.

See Property accessors on MDN.