types.ts

export type EventType = keyof DocumentEventMap

export type EventTypeInit<K extends EventType> = SpecificEventInit<
  FixedDocumentEventMap[K]
>

export interface FixedDocumentEventMap extends DocumentEventMap {
  input: InputEvent
}

type SpecificEventInit<E extends Event> = E extends InputEvent
  ? InputEventInit
  : E extends ClipboardEvent
  ? ClipboardEventInit
  : E extends KeyboardEvent
  ? KeyboardEventInit
  : E extends PointerEvent
  ? PointerEventInit
  : E extends MouseEvent
  ? MouseEventInit
  : E extends UIEvent
  ? UIEventInit
  : EventInit

export interface PointerCoords {
  x?: number
  y?: number
  clientX?: number
  clientY?: number
  offsetX?: number
  offsetY?: number
  pageX?: number
  pageY?: number
  screenX?: number
  screenY?: number
}