搬運https://zhuanlan.zhihu.com/p/250812475
$ npm install -g yo generator-code
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated cross-spawn-async@2.2.5: cross-spawn no longer requires a build toolchain, use it instead
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! syscall access
npm ERR! path /usr/local/lib/node_modules
npm ERR! errno -13
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! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path: '/usr/local/lib/node_modules'
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/u51zhang/.npm/_logs/2021-03-25T07_58_41_310Z-debug.log
官方的解決方案：https://docs.npmjs.com/resolving-eacces-permissions-errors-when-installing-packages-globally/
官方提供了兩種解決方案：
- 重新安裝一個node version manager。（官方推薦）
參考地址：https://docs.npmjs.com/downloading-and-installing-node-js-and-npm
注：這個方法比較繁瑣疙驾，我選擇的是第二種方案凶伙。
2.改變npm默認的路徑。
步驟如下：
進入終端它碎，依次輸入一下命令
（1）創(chuàng)建global安裝任務的目錄
mkdir ~/.npm-global
（2）配置npm使用新的目錄
npm config set prefix '~/.npm-global'
（3）在~/.profile文件中增加配置
export PATH=~/.npm-global/bin:$PATH
（4）配置文件立即生效
source ~/.profile
（5）重新執(zhí)行命令
npm install -g xxxx
