Ionic apps are created and developed primarily through the Ionic command-line utility. The Ionic CLI is the preferred method of installation, as it offers a wide range of dev tools and help options along the way. It is also the main tool through which to run the app and connect it to other services, such as Appflow.
Install the Ionic CLI
Install the Ionic CLI with npm:
npm install -g @ionic/cli
If there was a previous installation of the Ionic CLI, it will need to be uninstalled due to a change in package name.
$ npm uninstall -g ionic
$ npm install -g @ionic/cli