What is Node.js?

• Node.js is a server environment that is free to use.
• Node.js is a free programming language.
• Node.js may be used on a variety of systems (Windows, Linux, Unix, Mac OS X, etc.)
• On the server, Node.js makes use of JavaScript.

Why Node.js?

A file request is handled in PHP or ASP as follows:

1. The task is saved in the computer’s file system.
2. Waits for the file system to open and read it.
3. The material is returned to the client.
4. Ready to take on the next task.

The following is how Node.js responds to a file request:

1. The task is saved in the computer’s file system.
2. Ready to take on the next task.
3. The server returns the content to the client when the file system has opened and read the file.

Node.js skips the waiting and immediately moves on to the next request.

Node.js is a memory-efficient single-threaded, non-blocking, asynchronous programming language.

What Can Node.js Do?

• Node.js can generate dynamic page content.
• Node.js is capable of creating, opening, reading, writing, deleting, and closing files on the server.
• Node.js has the ability to capture data from forms.
• Node.js has the ability to add, delete, and edit data in your database.