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<html><head><style>div { border: 1px solid black; padding:8px;}</style></head><body><h1>The Document Object</h1><h2>The getElementsByClassName() Method</h2><p>Change the background color of the first element with the classes "example" and "color":</p><div class="example"> <p>This is a paragraph.</p></div><br><div class="example color"> <p>This is a paragraph.</p></div><br><div class="example color"> <p>This is a paragraph.</p></div><script>const collection = document.getElementsByClassName("example color");collection[0].style.backgroundColor = "red";</script></body></html>