当我运行“Ionic start project name”时，我总是得到这个错误消息:
错误消息
Running command - failed![ERROR] An error occurred while running npm install (exit code 1):
module.js:471
throw err;
^
Error: Cannot find module '../lib/utils/unsupported.js'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at /usr/local/lib/node_modules/npm/bin/npm-cli.js:19:21
at Object.<anonymous> (/usr/local/lib/node_modules/npm/bin/npm-cli.js:79:3)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
如果你正在使用“n”库@ https://github.com/tj/n。执行以下步骤
echo $NODE_PATH
如果节点路径为空，则
sudo n latest - sudo is optional depending on your system
使用n切换Node.js版本后，npm可能无法正常工作。
curl -0 -L https://npmjs.com/install.sh | sudo sh
echo NODE_PATH
您现在应该看到您的节点路径。否则，它可能是别的东西
./lib/node_modules/npm/bin/npm-cli.js中的require('../lib/utils/unsupported.js')导致无法找到模块'../lib/utils/unsupported.js'错误。
根据nodejs require docs，所需的模块相对于文件进行搜索，因为它以../开头。
因此，如果我们从。/lib/node_modules/npm/bin/npm-cli.js开始选择相对路径../lib/utils/unsupported.js，那么所需的模块必须位于。/lib/node_modules/npm/lib/utils/unsupported.js中。如果它不在那里，我看到两个选项:
the installation is corrupt, in which case Vincent Ducastel's answer to reinstall node might work
npm is no symlink to ./lib/node_modules/npm/bin/npm-cli.js. This is what caused the error in my setup. If you call npm, it will typically find it be searching it in the directories listed in the PATH env var. It might for example be located in ./bin. However, npm in a ./bin directory should only be a symlink to the aforementioned ./lib/node_modules/npm/bin/npm-cli.js. If it is not a symlink but directly contains the code, somewhere in the installation process the symlink got replaced by the file it links to. In this case, it should be sufficient to recreate the symlink: cd ./bin; rm npm; ln -s ../lib/node_modules/npm/bin/npm-cli.js npm (update: command fixed, thx @massimo)
所有建议检查NODE_PATH或npmrc配置的答案都应该被忽略，因为相对地搜索模块时不会考虑这些。
尝试了以上所有/旧的brew安装答案，没有一个是为我的笔记本电脑工作。
只有下面的方法可以解决我的问题。
1)执行如下命令:
sudo rm -rf /usr/local/lib/node_modules/npm
brew uninstall --force node
2)进入Node.js官方网站https://nodejs.org/en/download/current/下载最新安装包。
3)再次运行你的npm命令，它应该不再有任何错误。
此方法适用于macOS Mojave Version 10.14.4。
