installer ionic globalement
$ npm install -g @ionic/cli
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$ npm install -g @ionic/clinpm uninstall -g ionic
npm i -g @ionic/cliTo go git bash or command prompt and type the following:
npm install -g @ionic/cli
To install Cordova and Ionic, use
npm install -g ionic cordovanpm i -g @ionic/cli$ ionic cordova plugin add integrator-cordova-plugin-downloader
$ npm install --save @ionic-native/downloader@4