// It's really that simple. Make sure the dimensions of 'elem' 
// fit the width of the PDF layout you're looking for.
// FYI: IE, Edge, Chrome, Firefox, etc. all have different dimensions when 
// they print.
function PrintElem(elem: HTMLElement)
{
    var mywindow = window.open('', 'PRINT', 'height=400,width=600');

    mywindow.document.write(elem.innerHTML);

    mywindow.document.close(); // necessary for IE >= 10
    mywindow.focus(); // necessary for IE >= 10*/

    mywindow.print();
      setTimeout(() => {
        // Without the timeout, the window seems to close immediately.
        mywindow.close();        
    }, 250);
}