Read environment variables in Node.js
Javascriptnode.jsEnvironment VariablesJavascript Problem Overview
Is there a way to read environment variables in Node.js code?
Like for example Python's os.environ['HOME']
.
Javascript Solutions
Solution 1 - Javascript
process.env.ENV_VARIABLE
Where ENV_VARIABLE
is the name of the variable you wish to access.
Solution 2 - Javascript
When using Node.js, you can retrieve environment variables by key from the process.env
object:
for example
var mode = process.env.NODE_ENV;
var apiKey = process.env.apiKey; // '42348901293989849243'
Here is the answer that will explain setting environment variables in node.js
Solution 3 - Javascript
If you want to use a string key generated in your Node.js program, say, var v = 'HOME'
, you can use
process.env[v]
.
Otherwise, process.env.VARNAME
has to be hardcoded in your program.
Solution 4 - Javascript
To retrieve environment variables in Node.JS you can use process.env.VARIABLE_NAME, but don't forget that assigning a property on process.env will implicitly convert the value to a string.
Avoid Boolean Logic
> > > Even if your .env file defines a variable like SHOULD_SEND=false or SHOULD_SEND=0, the values will be converted to strings (“false” and “0” respectively) and not interpreted as booleans.
if (process.env.SHOULD_SEND) {
mailer.send();
} else {
console.log("this won't be reached with values like false and 0");
}
Instead, you should make explicit checks. I’ve found depending on the environment name goes a long way.
db.connect({
debug: process.env.NODE_ENV === 'development'
});
Solution 5 - Javascript
You can use env package to manage your environment variables per project:
- Create a
.env
file under the project directory and put all of your variables there. - Add this line in the top of your application entry file:
require('dotenv').config();
Done. Now you can access your environment variables with process.env.ENV_NAME
.
Solution 6 - Javascript
If you want to see all the Enviroment Variables on execution time just write in some nodejs file like server.js:
console.log(process.env);
Solution 7 - Javascript
Using process.env. If Home is your env variable name then Try this:
const HOME = process.env.HOME;
Or
const { HOME } = process.env;
Solution 8 - Javascript
Why not use them in the Users directory in the .bash_profile
file, so you don't have to push any files with your variables to production?