node.js如何查看Windows/Mac系统的版本号

node.js如何查看Windows/Mac系统的版本号，下面web建站小编给大家详细介绍一下查询方法！

Windows版本查询

Version                                    major.minor   
------------------------------------------ ------------- 
 Windows 10, Windows Server 2016            10.0
 Windows 8.1, Windows Server 2012 R2        6.5
 Windows 8, Windows Server 2012             6.4
 Windows 7, Windows Server 2008 R2          6.3
 Windows Vista, Windows Server 2008         6.2
 Windows XP Professional x64 Edition,       5.1
 Windows Server 2003, Windows Home Server
 Windows XP                                 5.0
 Windows 2000                               5.0

Mac版本查询

$ sw_vers

ProductName:    macOS

ProductVersion: 11.4

BuildVersion:   20F71