CODEWITHSUNDEEP
javascriptnode.jsexpressvisual-studio-codebackend
Kareem Ehab
Kareem Ehab

Reputation: 1

Trying to change the environment variable in node.js from the terminal but its value is always undefined

I'm new to backend development and I have this following JS code using express

const express = require('express');
const app = express();
const port = process.env.PORT || '3000';
app.listen(port, ()=> console.log(`Listening on port ${port}...`));

I'm trying to change the environment variable process.env.PORT to a different port from the terminal using set PORT=5000 (I'm on windows) but whenever it runs, the value inside env.PORT is always undefined, am I doing something wrong? Also, I'm using VS Code.

Upvotes: 0

Views: 526

Answers (2)

Ashish Sharma
Ashish Sharma

Reputation: 476

I am using below script to run my node app for windows.

SET NODE_ENV=development& node app.js

Upvotes: 0

Silikhe
Silikhe

Reputation: 69

In reference to your code example, you want something like this:

var express = require("express");
var app = express();

// sets port 5000 to default or unless otherwise specified in the environment
app.set('port', process.env.PORT || 5000);

app.get('/', function(req, res){
    res.send('hello world');
});

// Only works on 3000 regardless of what I set environment port to or how I set
// [value] in app.set('port', [value]).
// app.listen(3000);
app.listen(app.get('port'));

process.env is a reference to your environment, so you have to set the variable there.

SET NODE_ENV=development

Upvotes: 1

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