x
<html><body><p id="p1">This is a paragraph</p><p id="p2">This is another paragraph</p><p>Click the button to compare the position of the two paragraphs.</p><button onclick="myFunction()">Try it</button><p><strong>Possible return values:</strong><br>1: The two nodes do not belong to the same document.<br>2: p1 is positioned after p2.<br>4: p1 is positioned before p2.<br>8: p1 is positioned inside p2.<br>16: p2 is positioned inside p1.<br>32: The two nodes has no relationship, or they are two attributes on the same element.</p><p><strong>Note:</strong> The compareDocumentPosition method is not supported in Internet Explorer 8 and earlier.</p><p><strong>Note:</strong> The returnvalue could also be a combination of values. I.e. the returnvalue 20 means that p2 is inside p1 (16) AND p1 is positioned before p2 (4).</p><p id="demo"></p><script>function myFunction() { var p1 = document.getElementById("p1").lastChild; var p2 = document.getElementById("p2").lastChild; var x = p1.compareDocumentPosition(p2); document.getElementById("demo").innerHTML = x;}</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_node_compdocpos by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:02:18 GMT --></html>