问题一 :
命令npm install nrm -g安装，nrm 1.2.1报错：
[TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
at validateString (internal/validators.js:122:11)
at Object.join (path.js:375:7)
at Object.<anonymous> (C:\Users\liyin\AppData\Roaming\npm\node_modules\nrm\cli.js:17:20)
at Module._compile (internal/modules/cjs/loader.js:1076:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1097:10)
at Module.load (internal/modules/cjs/loader.js:941:32)
at Function.Module._load (internal/modules/cjs/loader.js:782:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
at internal/main/run_main_module.js:17:47
] {
code: 'ERR_INVALID_ARG_TYPE'
}
解决方案：
第一步： 打开C:\Users\liyin\AppData\Roaming\npm\node_modules\nrm\cli.js
第二步：修改cli.js文件17行
//const NRMRC = path.join(process.env.HOME, '.nrmrc'); (删除)
const NRMRC = path.join(process.env[(process.platform == 'win32') ? 'USERPROFILE' : 'HOME'], '.nrmrc');
第三步：重新打开cmd弹窗 输入nrm ls
C:\Windows\system32>nrm ls
npm -------- https://registry.npmjs.org/
yarn ------- https://registry.yarnpkg.com/
cnpm ------- http://r.cnpmjs.org/
* taobao ----- https://registry.npm.taobao.org/
nj --------- https://registry.nodejitsu.com/
npmMirror -- https://skimdb.npmjs.com/registry/
edunpm ----- http://registry.enpmjs.org/
