https://resopal.com/modules/megaproduct/print.js

1// Create a jquery plugin that prints the given element.
2jQuery.fn.print = function(){
3    // NOTE: We are trimming the jQuery collection down to the
4    // first element in the collection.
5    if (this.size() > 1){
6        this.eq( 0 ).print();
7        return;
8    } else if (!this.size()){
9        return;
10    }
11 
12    // ASSERT: At this point, we know that the current jQuery
13    // collection (as defined by THIS), contains only one
14    // printable element.
15 
16    // Create a random name for the print frame.
17    var strFrameName = ("printer-" + (new Date()).getTime());
18 
19    // Create an iFrame with the new name.
20    var jFrame = $( "<iframe name='" + strFrameName + "'>" );
21 
22    // Hide the frame (sort of) and attach to the body.
23    jFrame
24        .css( "width", "1px" )
25        .css( "height", "1px" )
26        .css( "position", "absolute" )
27        .css( "left", "-9999px" )
28        .appendTo( $( "body:first" ) )
29    ;
30 
31    // Get a FRAMES reference to the new frame.
32    var objFrame = window.frames[ strFrameName ];
33 
34    // Get a reference to the DOM in the new frame.
35    var objDoc = objFrame.document;
36 
37    // Grab all the style tags and copy to the new
38    // document so that we capture look and feel of
39    // the current document.
40 
41    // Create a temp document DIV to hold the style tags.
42    // This is the only way I could find to get the style
43    // tags into IE.
44    var jStyleDiv = $( "<div>" ).append(
45        $( "style" ).clone()
46        );
47 
48    // Write the HTML for the document. In this, we will
49    // write out the HTML of the current element.
50    objDoc.open();
51    objDoc.write( "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">" );
52    objDoc.write( "<html>" );
53    objDoc.write( "<body>" );
54    objDoc.write( "<head>" );
55    objDoc.write( "<title>" );
56    objDoc.write( document.title );
57    objDoc.write( "</title>" );
58    objDoc.write( jStyleDiv.html() );
59    objDoc.write( "</head>" );
60    objDoc.write( this.html() );
61    objDoc.write( "</body>" );
62    objDoc.write( "</html>" );
63    objDoc.close();
64 
65    // Print the document.
66    objFrame.focus();
67    objFrame.print();
68 
69    // Have the frame remove itself in about a minute so that
70    // we don't build up too many of these frames.
71    setTimeout(
72        function(){
73            jFrame.remove();
74        },
75        (60 * 1000)
76        );
77}