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<html><style>.democlass {color: red;}</style><body><h1>The Document Object</h1><h2>The createAttribute() and setAttributeNode() Methods</h2><p>Create a style attribute that adds a red color to the h1 element.</p><script>// Create a class attribute:const att = document.createAttribute("style");// Set the value of the class attributeatt.value = "color:red";// Add the class attribute to the first h1;const h1 = document.getElementsByTagName("h1")[0];h1.setAttributeNode(att);</script></body></html>