Source Code:
(back to article)
Submit
Result:
Report an issue
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>querySelector Example</title> </head> <body> <div class="example">Element 1</div> <div class="example">Element 2</div> <button onclick="highlightFirst()">Highlight First</button> <script> function highlightFirst() { const element = document.querySelector('.example'); element.style.backgroundColor = 'lightblue'; } </script> </body> </html>