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<!DOCTYPE html> <html> <body> <h1>The Document Object</h1> <h2>The querySelectorAll() Method</h2> <p>Set the background color of all h3 and span elements:</p> <h1>A H1 element</h1> <h2>A H2 element</h2> <h3>A H3 element</h3> <p>A p element.</p> <p>A p element with a <span style="color:brown;">span</span> element.</p> <script> const list = document.querySelectorAll("h3, span"); for (let i = 0; i < list.length; i++) { list[i].style.backgroundColor = "red"; } </script> </body> </html>
