/**
 * The Event interface represents any event which takes place in the DOM; some are user-generated (such as mouse or keyboard events), while others are generated by APIs (such as
 * events that indicate an animation has finished running, a video has been paused, and so forth). While events are usually triggered by such "external" sources, they can also be
 * triggered programmatically, such as by calling the HTMLElement.click() method of an element, or by defining the event, then sending it to a specified target using
 * EventTarget.dispatchEvent(). There are many types of events, some of which use other interfaces based on the main Event interface. Event itself contains the properties and
 * methods which are common to all events.
 */
interface Event {
  /**
   * Returns true or false depending on how event was initialized. True if event goes through its target's ancestors in reverse tree order, and false otherwise.
   */
  readonly bubbles: boolean
  cancelBubble: boolean
  readonly cancelable: boolean
  /**
   * Returns true or false depending on how event was initialized. True if event invokes listeners past a ShadowRoot node that is the root of its target, and false otherwise.
   */
  readonly composed: boolean
  readonly defaultPrevented: boolean
  readonly eventPhase: number
  /**
   * Returns true if event was dispatched by the user agent, and
   * false otherwise.
   */
  readonly isTrusted: boolean
  returnValue: boolean
  /**
   * Returns the event's timestamp as the number of milliseconds measured relative to
   * the time origin.
   */
  readonly timeStamp: number
  /**
   * Unauthorized and redirect error status codes (for example 401, 403, 301, 307)
   */
  readonly status?: number | undefined
  /**
   * Returns the type of event, e.g.
   * "click", "hashchange", or
   * "submit".
   */
  readonly type: string
  readonly AT_TARGET: number
  readonly BUBBLING_PHASE: number
  readonly CAPTURING_PHASE: number
  readonly NONE: number
  composedPath(): any[]
  initEvent(type: string, bubbles?: boolean, cancelable?: boolean): void
  preventDefault(): void
  /**
   * Invoking this method prevents event from reaching
   * any registered event listeners after the current one finishes running and, when dispatched in a tree, also prevents event from reaching any
   * other objects.
   */
  stopImmediatePropagation(): void
  /**
   * When dispatched in a tree, invoking this method prevents event from reaching any objects other than the current object.
   */
  stopPropagation(): void
}

interface EventInit {
  bubbles?: boolean | undefined
  cancelable?: boolean | undefined
  composed?: boolean | undefined
}

interface MessageEventInit<T = any> extends EventInit {
  data?: T | undefined
  lastEventId?: string | undefined
  origin?: string | undefined
}

/** The MessageEvent interface represents a message received by a target object. */
interface MessageEvent<T = any> extends Event {
  /**
   * Returns the data of the message.
   */
  readonly data: T
  /**
   * Returns the last event ID string, for server-sent events.
   */
  readonly lastEventId: string
  /**
   * Returns the origin of the message, for server-sent events and
   * cross-document messaging.
   */
  readonly origin: string
}