how to get the div to resize to window size code example

Example: how to scale div to window size

function fillDiv(div, proportional) {
  var currentWidth = div.outerWidth();
  var currentHeight = div.outerHeight();

  var availableHeight = window.innerHeight;
  var availableWidth = window.innerWidth;

  var scaleX = availableWidth / currentWidth;
  var scaleY = availableHeight / currentHeight;

  if (proportional) {
    scaleX = Math.min(scaleX, scaleY);
    scaleY = scaleX;
  }

  var translationX = Math.round((availableWidth - (currentWidth * scaleX)) / 2);
  var translationY = Math.round((availableHeight - (currentHeight * scaleY)) / 2);

  div.css({
    "position": "fixed",
    "left": "0px",
    "top": "0px",
    "-webkit-transform": "translate(" + translationX + "px, "
                                      + translationY + "px) scale3d("
                                      + scaleX + ", " + scaleY + ", 1)",
    "-webkit-transform-origin": "0 0"
  });
}

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Misc Example