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<html><style>.myStyle { background-color: coral; padding: 16px;}</style><body><h1>The Element Object</h1><h2>The className Property</h2><button onclick="myFunction()">Change</button><p>Click "Change" to change the font size, if "myDIV" has a "myStyle" class.</p><div id="myDIV" class="myStyle"><p>I am myDIV.</p></div><script>function myFunction() { const element = document.getElementById("myDIV"); if (element.className == "myStyle") { element.style.fontSize = "30px"; }}</script></body></html>