Node 是一个让 JavaScript 运行在服务端的开发平台，它让 JavaScript 成为与PHP、Python、Perl、Ruby 等服务端语言平起平坐的脚本语言。

更新node版本的方法：

1、更新node版本命令：

npm install -g n

2、升级node到最新稳定版

n stable

遇到的错误：
1 、

D:\webpack>npm install -g n 
npm ERR! Windows_NT 6.1.7601 
npm ERR! argv “C:\Program Files\nodejs\node.exe” “C:\Program Files\nodejs\ 
node_modules\npm\bin\npm-cli.js” “install” “-g” “n” 
npm ERR! node v6.9.2 
npm ERR! npm v3.10.9 
npm ERR! code EBADPLATFORM
npm ERR! notsup Unsupported platform for n@2.1.8: wanted {“os”:”!win32”,”arch”:” 
any”} (current: {“os”:”win32”,”arch”:”x64”}) 
npm ERR! notsup Valid OS: !win32 
npm ERR! notsup Valid Arch: any
npm ERR! notsup Actual OS: win32 
npm ERR! notsup Actual Arch: x64
npm ERR! Please include the following file with any support request: 
npm ERR! D:\webpack\npm-debug.log

解决方案

npm install -g n --force或-f:强制重新安装

2、

D:\webpack>npm install webpack –save-dev 
npm ERR! Windows_NT 6.1.7601 
npm ERR! argv “C:\Program Files\nodejs\node.exe” “C:\Program Files\nodejs\ 
node_modules\npm\bin\npm-cli.js” “install” “webpack” “–save-dev” 
npm ERR! node v6.9.2 
npm ERR! npm v3.10.9 
npm ERR! code ENOSELF 
npm ERR! Refusing to install webpack as a dependency of itself 
npm ERR! 
npm ERR! If you need help, you may report this error at: 
npm ERR! https://github.com/npm/npm/issues
npm ERR! Please include the following file with any support request: 
npm ERR! D:\webpack\npm-debug.log

解决方案：
出现问题是因为：package.json中已经有webpack了，换个名字就行了