Very simple installation and configuration of nodejs

install NodeJS And configuration

One 、 summary

NodeJs It's a JavaScript Operating environment , be based on V8 engine . send JavaScript It is possible to implement back-end programs .Node.js Use an event driven 、 Non-blocking type I/O Model of , Make it lightweight and efficient .Node.js The software package ecosystem of npm Is the world's largest open source repository ecosystem

Two 、windows install

Node.js Official website download ：https://nodejs.org/en/download/

Click the corresponding version to download , After installation , View the version on the console , Confirm that the installation is effective .

Open the installation directory to view ,npm Also installed here .

3、 ... and 、 To configure

Due to the global installation , Will be installed to C Discoid C:\Users\ user name \AppData\Roaming The next path npm and npm_cache Next , To customize the installation path , stay node.js Create two new folders under the installation directory node_global and node_cache.

open cmd, Enter the configuration command

npm config set prefix "D:\Environment\nodejs\node_global"

npm config set cache "D:\Environment\nodejs\node_cache"

You also need to configure environment variables

“ environment variable ” -> “ System variables ”： Create a new variable named “NODE_PATH”, The value is “D:\Environment\nodejs\node_global\node_modules”, Here's the picture ：

“ environment variable ” -> “ User variables ”： Edit... In the user variable Path, modify npm The path of （“C:\Users\ user name \AppData\Roaming\npm”） Change it to ：“D:\Environment\nodejs\node_global”, as follows ：

Four 、 test

perform npm install http-server -g To install a http The server