Chrome Version       : 50.0.2661.102 (Official Build) m (32-bit)
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari: 
    Firefox: OK
         IE: OK

What steps will reproduce the problem?
(1) I have an 100% height iframe that has contents that scroll inside the iframe and I want to print just the iframe and all its content (without scrollbars), so I use the following code to make the iframe the body of the page:

(function() {
  var beforePrint = function() {

    console.log('Functionality to run before printing:' + window.printOnce);

    if(window.printOnce){
      return;
    }
    else{
      window.printOnce=true;
    }
    var $ = jQuery;
    var iFrame = $('iframe[name=printMe]');
    var iFrameBody = $(iFrame[0].contentDocument.getElementsByTagName('body')[0]);

    var div = iFrameBody.find(".hx-fullscreen");
    div.css("bottom", "inherit");
    iFrameBody.find("form").css("bottom", "inherit");

    var iFrameChildren = iFrameBody.children();
    var body = $('body');
    body.css("height", "inherit");
    body.css("display", "none");
    var originalChildren = body.children();
    originalChildren.remove();

    body.append(iFrameChildren);

    //try to force Reflow?
    body.css("display", "");

  };
  var afterPrint = function() {
    console.log('Functionality to run after printing');
  };

  if (window.matchMedia) {
    var mediaQueryList = window.matchMedia('print');
    mediaQueryList.addListener(function(mql) {
      if (mql.matches) {
        beforePrint();
      } else {
        afterPrint();
      }
    });
  }

  window.onbeforeprint = beforePrint;
  window.onafterprint = afterPrint;
}());


What is the expected result?

The print preview should show the full contents of the iframe without a scrollbar


What happens instead?

The first print preview shows the contents of the iframe with scrollbars so I don't see the entire contents of the iframe

If I Cancel the print preview and press print a second time, the full contents of the iframe is displayed. It seems that if the print preview waited a little longer, then the first print would work fine.


Please provide any additional information below. Attach a screenshot if
possible.

1) pageBeforePrint shows the state of the page before I press print
2) notice the firstPrintPreview has 1 page (wrong)
3) notice the secondPrintPreview has 15 pages (right)

 

Deleted: pageBeforePrint.png 220 KB

	pageBeforePrint.png 220 KB View Download

Deleted: firstPrintPreview.png 282 KB

	firstPrintPreview.png 282 KB View Download

Deleted: secondPrintPreview.png 287 KB

	secondPrintPreview.png 287 KB View Download