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<html><body><h1>The Element Object</h1><h2>The querySelectorAll() Method</h2><p>Add a background color to all elements with class="example" in "myDIV":</p><div id="myDIV" style="border:1px solid black"> <h2 class="example">A Heading</h2> <p class="example">A p element.</p> <p class="example">A p element.</p> <p>A p <span class="example">element</span>.</p></div><script>const element= document.getElementById("myDIV");const list = element.querySelectorAll(".example");for (let i = 0; i < list.length; i++) { list[i].style.backgroundColor = "red";}</script></body></html>