Example code to Marker component in post of state management posting

Marker.ts

export class Marker extends EventEmitter {
  constructor(
    private id: number,
  ) {
    super();

    document.querySelector("marker").addEventListener("click", () => {
      // do something
      this.trigger("card_action", this.id);
    });
  }

  do() {
    // do something
  }
}