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<!DOCTYPE html> <html> <body> <h1>The Document Object</h1> <h2>The querySelector() Method</h2> <p>Add a background color to the first p element with class="example".</p> <h2 class="example">A heading</h2> <p class="example">A paragraph.</p> <script> document.querySelector("p.example").style.backgroundColor = "red"; </script> </body> </html>
