javascript - App not running on port defined in .env file | NodeJS - Stack Overflow

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Following is my code -

apps.js

const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;

app.get('/api/users', (_req, res) => {
  res.send('Hello World');
})

app.listen(PORT, () => {
  console.log(`Server running on port: `, PORT);
});

.env file

PORT=8000

Now when I run the program though terminal via mand - node app.js

I am getting -

Server running on port:  3000

but I want it to run on 8000 and pick it from .env file. Let me know what I am doing wrong here.

I know while running from terminal I can define PORT=8000 or app.set() but I am looking to pick it from an environment file. Let me know what I am doing wrong here / in terms of understanding.

Following is my code -

apps.js

const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;

app.get('/api/users', (_req, res) => {
  res.send('Hello World');
})

app.listen(PORT, () => {
  console.log(`Server running on port: `, PORT);
});

.env file

PORT=8000

Now when I run the program though terminal via mand - node app.js

I am getting -

Server running on port:  3000

but I want it to run on 8000 and pick it from .env file. Let me know what I am doing wrong here.

I know while running from terminal I can define PORT=8000 or app.set() but I am looking to pick it from an environment file. Let me know what I am doing wrong here / in terms of understanding.

• javascript
• node.js
• express
• environment-variables

Share Improve this question Follow asked Apr 6, 2022 at 6:52 NeshNesh 2,58199 gold badges4040 silver badges5656 bronze badges 1

• 2 But you're not importing your .env file in your app at all. Use dotenv – Jeremy Thille Commented Apr 6, 2022 at 6:55

Add a ment  | 

1 Answer 1

Sorted by: Reset to default 8

You can use dotenv npm package for custom environment variables.

Usage

Create a .env file in the root of your project:

PORT=8000

As early as possible in your application, import and configure dotenv:

require('dotenv').config();

// Your .env variables is now available in process.env object

const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;

app.get('/api/users', (_req, res) => {
  res.send('Hello World');
})

app.listen(PORT, () => {
  console.log(`Server running on port: `, PORT);
});

Read more in the official package: dotenv

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