Node.js "process.env" Property

The "process.env" functionality is an inbuilt application in the nodejs to display the user environment. It is the programming interface of the nodejs process module to get the user environment as an output.

Syntax

The following syntax uses in the output function to get and display data.

process.env
OR
console.log(process.env);

Return Value: This property shows an object of the user environment.

Examples

Below examples display the operation and the use of the nodejs process.env property.

Example1

console.log("Node.js process.env Property");
// Node.js program to operate the process.env Property
// Use process module of the server
const process_data = require('process');
//show the process.env property information
console.log(process.env);

Output

The image shows the "process.env" property information.

Node.js process.env Property

Example 2

The example shows the basic data of the server using the property. We can get server-related information using the process.

// Node.js program to operate the process.env Property
console.log("Node.js process.env Property");
//It contains the processing module
const process = require('process');
// Printing process.env property value
var no_env = 0;
// Calling process.env with the variable
var env_var = process.env;
// Iterating through all returned data
for (var key in env_var) {
// Print value
console.log(key + " :\t\t\t " + env_var[key]);
no_env++;
}
// display count
console.log("total no of values available = "
+ no_env);
// Access one by one all the information
console.log("operating system: " + env_var['OS']);
console.log("alluserprofile: " + env_var['ALLUSERSPROFILE']);
console.log("public directory: " + env_var['PUBLIC']);

Output

The image shows the "process.env" property information.

Node.js process.env Property

Example 3

The example shows the basic data of the server using the property. Here, we can add and delete new data with the process.env property.

// Node.js program to operate the process.env Property
console.log("Node.js process.env Property");
// it contains the process module
const process = require('process');
// Printing process.env property value
var env_proc = process.env;
console.log("operating system: " + env_proc.OS);
console.log("all use r profile: " + env_proc.ALLUSERSPROFILE);
console.log("public directory: " + env_proc.PUBLIC);
// Setting new data
env_proc.getd= "gekcho custom data";
console.log("stored in env.gekcho: " + env_proc.getd);
// Delete data
delete env_proc.getd
console.log("contain in env.gekcho: " + env_proc.getd);

Output

The image shows the "process.env" property information.

Node.js process.env Property

Example 4

The example shows the basic data of the server using the property. We can get the path and port of the process.

// Node.js program to operate the process.env Property
console.log("Node.js process.env Property");
//basic process property
console.log(process.env);
//get the path of the process
const PATH_process = process.env.PATH
// Calling process.env for the port
const PORT_process = parseInt(process.env.PORT);
// Access one by one all the information
console.log("Process Path: " + PATH_process);
console.log("Process PORT: " + PORT_process);

Output

The image shows the "process.env" property information.

Node.js process.env Property

Conclusion

The nodejs process.env is the environmental variable to get system information. The process detail displays a single keyword or line in the console tab. The method is essential and easy to use for the developer and users.

Node.js Tutorial

Node.js MySQL

Node.js MongoDB

Nodejs Difference

Nodejs Misc

Node.js MCQ

Node.js Express

Nodejs Interview Questions