1. npm ERR! code E404 npm ERR! 404 Not Found - GET https://registry.npmjs.com/@mlamp%2fuser-info-dropdown - Not found

是在网上看到这个博主说的解决方案才解决的→javascript:void(0)

原因是npm源指向的问题,须执行以下命令:

npm config set registry https://registry.npmjs.org/

然后就可以正常安装了,折腾半天o(╥﹏╥)o