Allow to append instantclick bar on div and not only on body

[kamov]

I have a plugin that manipulate DOM and so instantclick bar is moved by this plugin causing some issue.
I hope you can add option to append instantclick bar not only on body but on a specific div, or allow to add it by default in html.

I modify update function in this way:

function update() {
  $barElement.style[$barTransformProperty] = 'translate(' + $barProgress + '%)'
  if (!document.getElementById($barContainer.id)) {
    //document.body.appendChild($barContainer)
      document.getElementById('wrapper').appendChild($barContainer); // Updated
  }
}