commercetools-8.x-1.2-alpha1/modules/commercetools_decoupled/components/blocks/categories-list-block/js/CategoriesListBlock.js

class CategoriesListBlock extends HTMLElement {
  connectedCallback() {
    const categoriesList = document.createElement('ct-categories-list');
    categoriesList.componentConfig =
      window.commercetools.getComponentConfig(this);
    this.appendChild(categoriesList);
  }
}

customElements.define('ct-categories-list-block', CategoriesListBlock);