mac 安装 npm install -g vue-cli报错

npm install -g vue-cli

npm WARN deprecated coffee-script@1.12.7: CoffeeScript on NPM has moved to "coffeescript" (no hyphen)
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
npm ERR! path /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR!  { [Error: EACCES: permission denied, access '/usr/local/lib/node_modules']
npm ERR!   stack:
npm ERR!    'Error: EACCES: permission denied, access \'/usr/local/lib/node_modules\'',
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'access',
npm ERR!   path: '/usr/local/lib/node_modules' }
npm ERR! 
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
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 (though this is not recommended).

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/annie/.npm/_logs/2019-07-04T01_26_11_407Z-debug.log

解决办法

• sudo chown -R $USER /usr/local

再次安装就好了。

第二种情况

npm WARN deprecated vue-cli@2.9.6: This package has been deprecated in favour of @vue/cli
Unhandled rejection Error: EACCES: permission denied, mkdir '/Users/annie/.npm/_cacache/index-v5/c0/aa'

Unhandled rejection Error: EACCES: permission denied, mkdir '/Users/annie/.npm/_cacache/index-v5/a0/3b'

Unhandled rejection Error: EACCES: permission denied, mkdir '/Users/annie/.npm/_cacache/index-v5/28/a3'

显然是权限的问题：

sudo chown -R $USER:$GROUP ~/.npm
sudo chown -R $USER:$GROUP ~/.config

再次运行就好了～～～