我被上面的问题困扰了好久
解决方法：删除C:\Users\HW.npmrc
npm ERR! code EPERM
npm ERR! syscall mkdir
npm ERR! path D:\Program Files\nodejs\node_cache\_cacache\index-v5\38\a4
npm ERR! errno -4048
npm ERR! Error: EPERM: operation not permitted, mkdir 'D:\Program Files\nodejs\node_cache\_cacache\index-v5\38\a4'
npm ERR! [Error: EPERM: operation not permitted, mkdir 'D:\Program Files\nodejs\node_cache\_cacache\index-v5\38\a4'] {
npm ERR! errno: -4048,
npm ERR! code: 'EPERM',
npm ERR! syscall: 'mkdir',
npm ERR! path: 'D:\\Program Files\\nodejs\\node_cache\\_cacache\\index-v5\\38\\a4',
npm ERR! requiredBy: '.'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.
