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<html><body><h1>The Document Object</h1><h2>The getElementsByTagName() Method</h2><p>An unordered list:</p><ul> <li>Coffee</li> <li>Tea</li> <li>Milk</li></ul><p>The tag name of all elements:</p><p id="demo"></p><script>const collection = document.getElementsByTagName("*");let text = ""for (let i = 0; i < collection.length; i++) { text += collection[i].tagName + "<br>";}document.getElementById("demo").innerHTML = text;</script></body></html>