import Component, { ComponentEvent } from "@egjs/component";

interface Events {
  event1: {
    prop1: number;
    prop2: string;
  };
  // You can also define like this if there're more than one arguments for a event
  event2: (arg0: number, arg1: string, arg2: boolean) => void;
  // If there're no event props
  event3: void;
  // If you want additional properties like `currentTarget`, `eventType`, `stop`
  // You can use ComponentEvent with additional properties
  event4: ComponentEvent<{ a: number; b: string }>;
}

class SomeClass extends Component<Events> {
  thing() {
    this.on("event4", e => {
      // These properties will be available for typescript-enabled environment
      e.a; // number
      e.b; // string
      e.currentTarget; // SomeClass(this)
      e.eventType; // string("event4")
      e.stop(); // () => void
      e.isCanceled(); // Will return true when "stop()" is called.
    });
  }
}

// You can trigger events like this
const component = new SomeClass();
component.trigger("event1", {
  prop1: 1,
  prop2: "abc"
});
component.trigger(new ComponentEvent("event4", { a: 123, b: "abcd" }));