➜ my-pro sudo npm uninstall vue-cli -g
up to date in 0.048s
➜ my-pro vue -v
zsh: command not found: vue
➜ my-pro vue -V
zsh: command not found: vue
➜ my-pro npm install -g @vue/cli
npm ERR! Unexpected end of JSON input while parsing near ‘…ependencies":{"@babel’

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/pengxing/.npm/_logs/2018-10-24T13_29_18_048Z-debug.log