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Print a div using javascript in angularJS single page application

I have a single page web application using angularJS. I need to print a div of certain page. I tried the following:

The page contains few div (print.html)

<div>
  <div>
    Do not print
  </div>
  <div id="printable">
    Print this div
  </div>
  <button ng-click="printDiv('printableArea');">Print Div</button>
</div>

The controller has following script:

$scope.printDiv = function(divName) {
    var printContents = document.getElementById(divName).innerHTML;
    var originalContents = document.body.innerHTML;        
    document.body.innerHTML = printContents;
    window.print();
    document.body.innerHTML = originalContents;
}

This code prints the desired div but there is a problem. the statement document.body.innerHTML = originalContents; replaces the body of the whole application since it is a SPA. So when I refresh the page or click on print button again, the whole content of the page is erased.

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$scope.printDiv = function(divName) {
  var printContents = document.getElementById(divName).innerHTML;
  var popupWin = window.open('', '_blank', 'width=300,height=300');
  popupWin.document.open();
  popupWin.document.write('<html><head><link rel="stylesheet" type="text/css" href="style.css" /></head><body onload="window.print()">' + printContents + '</body></html>');
  popupWin.document.close();
} 

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