javascript - jQuery doesn't recognize identical textnodes (sometimes) -


i wanted use jquery tweak copy-mechanism. noticed when anchor , focus nodes of selection same, corresponding jquery objects (compared using .is method) not.

in chrome , firefox (windows) comparison fails in example:

<html>     <head>         <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>         <script>             $(function () {                 $("#testdiv").on("copy", function(event) {                     var sel = window.getselection();                     var $anchornode = $(sel.anchornode);                     var $focusnode = $(sel.focusnode);                     $("#logdiv").append("<p>the dom nodes are" + (sel.anchornode == sel.focusnode ? "" : "<b> not</b>") + " same.</p>");                     $("#logdiv").append("<p>the jquery objects are" + ($anchornode.is($focusnode) ? "" : "<b> not</b>") + " same.</p>");                     $("#logdiv").append("<p>parent: dom nodes are" + (sel.anchornode.parent == sel.focusnode.parent ? "" : "<b> not</b>") + " same.</p>");                     $("#logdiv").append("<p>parent: jquery objects are" + ($anchornode.parent().is($focusnode.parent() ) ? "" : "<b> not</b>") + " same.</p>");                 });             });         </script>     </head> <body>     <div id="testdiv">         select text inside div , press ctrl+c.     </div>     <div id="logdiv" style="border: 1pt solid black;"><p><i>log</i></p></div> </body> </html>

i prepared jsfiddle illustrate this, couldn't reproduce there.

so tried so's snippet widget. works again:

$(function () {                  $("#testdiv").on("copy", function(event) {                      var sel = window.getselection();                      var $anchornode = $(sel.anchornode);                      var $focusnode = $(sel.focusnode);                      $("#logdiv").append("<p>the dom nodes are" + (sel.anchornode == sel.focusnode ? "" : "<b> not</b>") + " same.</p>");                      $("#logdiv").append("<p>the jquery objects are" + ($anchornode.is($focusnode) ? "" : "<b> not</b>") + " same.</p>");                      $("#logdiv").append("<p>parent: dom nodes are" + (sel.anchornode.parent == sel.focusnode.parent ? "" : "<b> not</b>") + " same.</p>");                      $("#logdiv").append("<p>parent: jquery objects are" + ($anchornode.parent().is($focusnode.parent() ) ? "" : "<b> not</b>") + " same.</p>");                  });              });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <div id="testdiv">          select text inside div , press ctrl+c.      </div>      <div id="logdiv" style="border: 1pt solid black;"><p><i>log</i></p></div>

any ideas on what's happening?


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