import Carousel from 'Carousel';

// or if you inject ImageTool via standalone script
const Carousel = window.Carousel;
 
var editor = EditorJS({
  ...

  tools: {
    ...
    carousel: {
                    class: Carousel,
                    config: {
                        endpoints: {
                            byFile: "URL_FETCH",
                        }
                    }
                },
  }

  ...
});