npm registry

1.查看npm镜像源
npm config get registry
默认值 https://registry.npmjs.org/
2.设置npm镜像源
npm config set registry https://registry.npm.taobao.org/
淘宝 https://registry.npm.taobao.org/

1.安装 vue
npm install -g vue
2.安装 vue cli
npm install -g @vue/cli

创建vue项目
vue create project-name
启动
npm run serve
安装node-sass
npm install node-sass --sass-binary-site=http://npm.taobao.org/mirrors/node-sass