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<html><body><h1>The HTMLCollection Object</h1><h2>The length Property</h2><p>The tags in this document are:</p><p id="demo"></p><script>const elements = document.getElementsByTagName("*");let text = "";for (let i = 0; i < elements.length; i++) { text += elements[i].tagName + "<br>";}document.getElementById("demo").innerHTML = text;</script></body></html>