npm not recommended for use Taobao mirror, npm with cnpm switch between Portal: https://www.cnblogs.com/chendongbky/p/11125648.html
Documents attached Ionic address https://ionicframework.com/docs/
1. Install and Ionic Cordova
npm install -g ionic cordova
cnpm install -g ionic cordova
2. Use the template to create a Ionic Angular application
ionic start project-name tabs
3. Either way running project, with particular reference to the configuration package.json
npm run start
ionic serve