命令
npm config list
看下方是否有:
; cli configs
metrics-registry = "http://registry.npm.taobao.org/"
scope = ""
user-agent = "npm/6.14.4 node/v14.0.0 win32 x64"
; userconfig C:\Users\16253\.npmrc
registry = "http://registry.npm.taobao.org/"
若出現則安裝成功