Node.js is a JavaScript-based runtime environment frequently used in modern web and application development. It enables you to create fast, scalable, and efficient applications.
What is Node.js and Why Use It?
Node.js is an open-source runtime environment built on Chrome's V8 JavaScript engine. It stands out for the following advantages:
High Performance: Its asynchronous architecture allows for quick processing.
Single Language Usage: You can use JavaScript on both the server and client sides.
Extensive Library Support: Thousands of ready-made packages are available through NPM (Node Package Manager).
Community Support: It has a large and active user base.
How to Install Node.js?
Node.js installation varies depending on your operating system. Below are the steps for Windows, macOS, and Linux.
1. Download the Node.js Installer
Visit the official Node.js website: https://nodejs.org.
Choose the "LTS (Long Term Support)" version for stability and long-term support.
2. Run the Installer
Execute the downloaded
.msi
file.Follow the steps in the installation wizard:
Accept the license agreement.
Choose an installation directory (you can use the default path).
Select additional components (NPM will be installed automatically).
Common Issues During Node.js Installation and Solutions
1. Command Not Recognized Error
Problem: If
node
ornpm
commands are not recognized, the PATH variable may not be correctly configured.Solution: Add the directory where Node.js is installed to the PATH environment variable.
2. Issues Installing NPM Modules
Problem: Permission errors when installing modules with NPM.
Solution: Use
sudo
to resolve permission issues:
Creating Your First Node.js Project
Once Node.js is installed, you can create a simple "Hello, World!" application:
Create a directory and navigate to it:
Create a file named
app.js
and add the main codes.Start the application:
Open your browser and visit
http://localhost:3000
to test your application.