Here are some useful resources:
npm install @pixi/ui
There is no default export. The correct way to import pixi-ui is:
import { Button, ScrollBox } from '@pixi/ui';
To use any of the components you can go to it's page and copy/paste the example code to your project.
This library requires Pixi v7.1.1
or higher as this is when the globalpointermove
event was added
See here for details