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<!DOCTYPE html> <html> <body onload="normPara()"> <h1>The Document Object</h1> <h2>The normalize() Method</h2> <button onclick="addTextNode()">Add a Text Node</button> <button onclick="normPara()">Normalize the Document</button> <p>The document has <span id="cc" style="font-size:20px">1</span> child node(s).</p> <script> function addTextNode() { const textNode= document.createTextNode("Click again. "); const body = document.body; body.appendChild(textNode); const cc = document.getElementById("cc"); cc.innerHTML = body.childNodes.length; } function normPara() { document.normalize(); const body = document.body; const cc = document.getElementById("cc"); cc.innerHTML = body.childNodes.length; } </script> </body> </html>
