x
<html><style>div { border: 1px solid black; padding: 16px;}</style><body><h1>The Element Object</h1><h2>The getElementsByClassName() Method</h2><div id="myDIV"> <p class="child">I am a paragraph.</p> <p class="child">I am a paragraph.</p> <p class="child">I am a paragraph.</p></div><p>Click "Change" to change the size of the second paragraph with class="child":</p><button onclick="myFunction()">Change</button><script>function myFunction() { const element = document.getElementById("myDIV"); element.getElementsByClassName("child")[1].style.fontSize = "24px";}</script></body></html>