DotEnv has been an amazing library that I’ve used for years. Node.js v20.6.0
is finally release and include support .env
files
We now have built-in support for the .env
file. This mean that you can finally stop using the dotenv
package to load environment variables from .env
file. The authors of dotenv
package is archived his Github repository.
Suppose you have a simple Express application
import express from "express";
const app = express();
app.get("/", async (req, res) => { res.send(`Hello! My name is Nam Hoai Nguyen.`);});
app.listen(PORT, async () => { console.log(`App listening on port 3000`);});
Now, create a file that had been named .env
at the root of the application next to app.js
file to store the environment variables.
NAME="Nam Hoai Nguyen"PORT=3000
By default, the Node.Js will be used file .env
to store environment variables. We can change the file name for our application by using the argument env-file
in start command. Example:
node --env-file=.env.local app.js
Need to change app.js
to check .env
is working correctly
import express from "express";
const app = express();
app.get("/", async (req, res) => { res.send(`Hello! My name is Nam Hoai Nguyen.`); res.send(`Hello! My name is ${process.env.NAME}.`);});
app.listen(PORT, async () => { console.log(`App listening on port 3000`); console.log(`App listening on port ${process.env.PORT}`);});
Then now if you visit http://localhost:3000
you should see the text : “Hello, My name is Nam Hoai Nguyen”
dotenv
v15 support