What is Node.js?



What is Node.js?

Node.js is an open source server environment which uses asynchronous programming to create networking and server-side applications by running JavaScript applications on the server.

  • Node.js is an open source server environment
  • Node.js is free
  • Node.js runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.)
  • Node.js uses JavaScript on the server side

What Can Node.js Do?

  • Node.js can collect form data
  • Node.js can generate dynamic page content
  • Node.js can create, open, read, write, delete, and close files on the server
  • Node.js can add, delete, modify data in your database

What is a Node.js File?

  • Node.js files contain tasks that will be executed on certain events
  • A typical event is someone trying to access a port on the server
  • Node.js files must be initiated on the server before having any effect
  • Node.js files have extension “.js”
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