Node.js Global Objects

In Node.js, there are several Global Objects that are available in all modules, such as console and process. These objects are part of the global scope and can be accessed from any module without requiring them explicitly. In this tutorial, we'll discuss the built-in Global Objects in Node.js.

Syntax

The syntax for using global objects in Node.js is as follows:

// To access built-in objects in Node.js
objectName.propertyName

// Example
console.log("Hello, world!");

Example

Here are some examples of built-in global objects in Node.js:

console

The console object is used to print messages to the console output. Here's how we can use it:

console.log("Hello, world!"); // Output: Hello, world!

process

The process object provides information about the current Node.js process and can be used to interact with it. Here's an example:

console.log(process.version); // Output: v14.15.1

global

The global object is a global variable in Node.js that represents the global namespace. Here's an example:

console.log(global.setTimeout); // Output: [Function: setTimeout]

Output

When we run the example code above, the output will be:

Hello, world!
v14.15.1
[Function: setTimeout]

This is because we used the console object to print a message to the console, the process object to get the version of the current Node.js process, and the global object to get the setTimeout function.

Explanation

In the examples above, we used various built-in global objects in Node.js. The console object is used to print messages to the console output, the process object provides information about the current Node.js process and can be used to interact with it, and the global object is a global variable in Node.js that represents the global namespace.

Use

Built-in global objects in Node.js can be used to interact with the Node.js environment, print messages to the console output, get information about the current process, etc.

Important Points

• When using global objects in Node.js, be aware of potential naming conflicts with variables and functions in your code.
• The use of global objects should be minimized where possible to avoid any unintended side effects or conflicts in your code.

Summary

In this tutorial, we discussed the built-in global objects in Node.js, such as console, process, and global. We covered the syntax, example, output, explanation, use, and important points of these objects. With this knowledge, you can now use the built-in global objects in Node.js to interact with the environment and perform various tasks.