我不能在NodeJS中使用命令提示符使用npm install。我在运行npm install时得到这些错误:
module.js:339
throw err;
^
Error: Cannot find module 'semver'
at Function.Module._resolveFilename (module.js:337:15)
at Function.Module._load (module.js:287:25)
at Module.require (module.js:366:17)
at require (module.js:385:17)
at Object.<anonymous> (C:\Users\admin\AppData\Roaming\npm\node_modules\npm\l
ib\config\defaults.js:6:14)
at Module._compile (module.js:435:26)
at Object.Module._extensions..js (module.js:442:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:311:12)
at Module.require (module.js:366:17)
只需删除/node_modules文件夹，然后重试。,)
你可以使用npm rm来删除它。
你也可以在GitHub上检查这个问题。
更具体地说，unnistal是这样的:
Uninstalling
So sad to see you go.
sudo npm uninstall npm -g Or, if that fails,
sudo make uninstall More Severe Uninstalling
Usually, the above instructions are sufficient. That will remove npm,
but leave behind anything you've installed.
If you would like to remove all the packages that you have installed,
then you can use the npm ls command to find them, and then npm rm to
remove them.
To remove cruft left behind by npm 0.x, you can use the included
clean-old.sh script file. You can run it conveniently like this:
npm explore npm -g -- sh scripts/clean-old.sh npm uses two
configuration files, one for per-user configs, and another for global
(every-user) configs. You can view them by doing:
npm config get userconfig # defaults to ~/.npmrc npm config get
globalconfig # defaults to /usr/local/etc/npmrc Uninstalling npm does
not remove configuration files by default. You must remove them
yourself manually if you want them gone. Note that this means that
future npm installs will not remember the settings that you have
chosen.
提醒一下，可执行npm通过node env执行:
xb@dnxb:/tmp$ type -a npm
npm is /usr/bin/npm
npm is /bin/npm
xb@dnxb:/tmp$ realpath /usr/bin/npm /bin/npm
/usr/share/npm/bin/npm-cli.js
/usr/share/npm/bin/npm-cli.js
xb@dnxb:/tmp$
xb@dnxb:/tmp$ head -1 /usr/share/npm/bin/npm-cli.js
#!/usr/bin/env node
我可以通过-a类型检查哪个节点被选择，第一行具有最优先级，即，如果我运行/usr/local/bin/node /usr/share/npm/bin/npm-cli.js，我可以得到相同的错误，但如果我运行/usr/bin/node /usr/share/npm/bin/npm-cli.js，则没有错误:
xb@dnxb:/tmp$ type -a node
node is /usr/local/bin/node
node is /usr/bin/node
node is /bin/node
xb@dnxb:/tmp$ realpath /usr/local/bin/node
/usr/local/bin/node
xb@dnxb:/tmp$ realpath /usr/bin/node
/usr/bin/node
xb@dnxb:/tmp$ realpath /bin/node
/usr/bin/node
xb@dnxb:/tmp$
有2个唯一的基于realpath的节点exe。如果你有类似的情况，那么你需要找出如何删除不需要的/损坏的节点exe，例如sudo rm /usr/local/bin/node或操纵env $PATH。
