x
<html><body><h1>The Document Object</h1><h2>The querySelectorAll() Method</h2><p>Add a background color all elements with class="example":</p><h2 class="example">A heading</h2><p class="example">A paragraph.</p> <script>const nodeList = document.querySelectorAll(".example");for (let i = 0; i < nodeList.length; i++) { nodeList[i].style.backgroundColor = "red";}</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_document_queryselectorall_class by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:39:43 GMT --></html>