<>1.输入指令: sudo npm install -g vue-cli 出现错误
npm ERR! code EACCES npm ERR! syscall mkdir npm ERR! path 
/usr/local/lib/node_modules/vue-cli npm ERR! errno -13 npm ERR! Error: EACCES: 
permission denied, mkdir '/usr/local/lib/node_modules/vue-cli' npm ERR! [Error: 
EACCES: permission denied, mkdir '/usr/local/lib/node_modules/vue-cli'] { npm 
ERR! errno: -13, npm ERR! code: 'EACCES', npm ERR! syscall: 'mkdir', npm ERR! 
path: '/usr/local/lib/node_modules/vue-cli' npm ERR! } 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. npm ERR! A complete log of 
this run can be found in: npm ERR! 
/Users/xiaobao/.npm/_logs/2022-02-28T13_46_09_609Z-debug-0.log 
 <>2.解决步骤:依次输入加粗指令
xiaobao@localhost ~ % mkdir ~/.npm-global
 xiaobao@localhost ~ % npm config set prefix '~/.npm-global’
 xiaobao@localhost ~ % export PATH=~/.npm-global/bin:$PATH
 xiaobao@localhost ~ % source ~/.profile
 source: no such file or directory: /Users/xiaobao/.profile
 xiaobao@localhost ~ % npm install -g jshint
added 30 packages, and audited 31 packages in 41s
3 packages are looking for funding
 run npm fund for details
found 0 vulnerabilities
 <>3.再次输入:sudo npm install -g vue-cli即可安装完成。
 <>4.最后输入:vue list 列出可用模版。
xiaobao@localhost ~ % vue list
Available official templates:
★ browserify - A full-featured Browserify + vueify setup with hot-reload, 
linting & unit testing.
 ★ browserify-simple - A simple Browserify + vueify setup for quick 
prototyping.
 ★ pwa - PWA template for vue-cli based on the webpack template
 ★ simple - The simplest possible Vue setup in a single HTML file
 ★ webpack - A full-featured Webpack + vue-loader setup with hot reload, 
linting, testing & css extraction.
 ★ webpack-simple - A simple Webpack + vue-loader setup for quick prototyping.