Ionic without angular

Hi all, I’m new on Ionic and I would like to start using it in a cordova app without the angular framework.
I tried using the script

<script src="https://unpkg.com/@ionic/core@latest/dist/ionic.js"></script>

but the app on a real device needs an internet connection to display all the components with their correct styles.

Is there a way to embed all the css and js code in the app to avoid that behavior?