解决下包慢的问题(常用命令)1.切换npm的下包镜像源1.查看当前的下包镜像源​npmconfiggetregistry2.将下包的镜像源切换为淘宝镜像源​npmconfigsetregistry=https://registry.npmmirror.com/3.检查镜像源是否下载成功​npmconfiggetregistry2.