function preventDefault (e) {
  e.preventDefault()
  e.returnValue = false
}
@typedef {{
  seekStep?: number,
  checkVisible?: boolean,
  disableBodyTrigger?: boolean,
  keyCodeMap?: { [propName: string]: any },
  disable: boolean,
  playbackRate: number,
  isIgnoreUserActive: boolean,
  [propName: string]: any
}} IKeyboardConfig