Introduction and installation of node. js

I. Introduction and installation of node. js

A) What is node. js?

1. node. JS is a development platform
2. Let JavaScript run on the server-side development platform

---Simple is to write a server with JavaScript .

b) node. js feature?

1. It can do Web sites with complex logic.
2. Be able to do big web apps based on social networks
3. Can do a Web socket server
4. Can do TCP/UDP socket application
5. Ability to develop command line tools
6. Can do interactive terminal programs and so on.

c) node. JS features?

1. The best feature is the asynchronous I/O and event-driven architecture design
2. Single-threaded model used by node. JS (implemented via callbacks)

d) node. JS Development History

A man named Ryan Dahi, he wants to put the server-side code and response to the client's code unified, and designed a development platform.

e) node. JS Installation

1. Official Web download (the development of the general should be downloaded on the official website)

Installation package Address https://nodejs.org/en/download/

2. Check if the installation is successful

(1) In the Terminal of window: View path

(2) If you see the Nodejs in Path,

Input command: node–version, check its version number, can see, indicating that the installation was successful.

Introduction and installation of node. js