View source for Node Environment Variable

[[Category:Node.js]]

 console.log(`NODE_ENV: ${process.env.NODE_ENV}`);  -> undefined 

 console.log(`app ${app.get('env}`).  -> development

by default env is development

to change it, write the line below in the command line
 export NODE_ENV=production


== Configuration == 
 npm i config

* create a "'''Config'''" folder in the root
* create a '''default.json''' and write settings in it
* create a '''development.json''' and write the settings you want to overwrite or new ones in it
* create a '''production.json''' and  write the settings you want to overwrite or new ones in it

=== using it in modules ===
 const config = require('config');
 ...
 ...
 config.get('applicationName') 
 // or for complex objects 
 config.get('mail.servername');

=== Secrets ===
* save sensitive settings in environment variables. ie '''app_password'''
* create a file named '''custom-environment-variables''' in '''config''' folder
* just like production.json overwrite the variable like 
 "mail":{
    "password":"app_password"
  }