CComponent.ts

export default class CComponent<
  TElements extends Element,
  TOptions extends Object
> {
  private elements: TElements | NodeListOf<TElements> | null;
  private options: TOptions;

  constructor(
    elements: TElements | NodeListOf<TElements> | null,
    options?: TOptions
  ) {
    this.elements = elements;
    this.options = Object.assign({}, options);

    if (!this.elements) {
      return;
    }

    if (this.elements instanceof NodeList) {
      Array.from(this.elements).forEach(element => {
        this.initialize(element, this.options);
      });
    } else if (this.elements instanceof HTMLElement) {
      this.initialize(this.elements, this.options);
    }
  }

  private initialize(element: TElements, options: TOptions) {
    return {
      element,
      options
    };
  }
}
    
export class MyComponent extends CComponent<Element, {}> {}