     cacheCurrentPage()
 
   rememberReferer()
-  progressBar?.start()
+  progressBar?.start(delay: progressBarDelay)
 
   if transitionCacheEnabled and !options.change and cachedPage = transitionCacheFor(url.absolute)
     fetchHistory cachedPage

      background-color: #0076ff;
      height: 3px;
      opacity: #{@opacity};
      width: #{@value}%;
      transition: width #{@speed}ms ease-out, opacity #{@speed / 2}ms ease-in;
      transform: translate3d(0,0,0);
    }

ProgressBarAPI =
  enable: ProgressBar.enable
  disable: ProgressBar.disable
  setDelay: (value) -> progressBarDelay = value
  start: (options) -> ProgressBar.enable().start(options)
  advanceTo: (value) -> progressBar?.advanceTo(value)
  done: -> progressBar?.done()

