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<!DOCTYPE html> <html> <body><!-- This is a comment node! --> <p>Click the button get the node names of the body element's child nodes.</p> <button onclick="myFunction()">Try it</button> <p><strong>Note:</strong> Whitespace inside elements is considered as text, and text is considered as nodes. Comments are also considered as nodes.</p> <p id="demo"></p> <script> function myFunction() { var nodelist = document.body.childNodes.length; document.getElementById("demo").innerHTML = nodelist; } </script> </body> </html>