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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>getElementsByTagName Example</title> </head> <body> <p>Paragraph 1</p> <p>Paragraph 2</p> <button onclick="highlightParagraphs()">Highlight Paragraphs</button> <script> function highlightParagraphs() { const paragraphs = document.getElementsByTagName('p'); for (let i = 0; i < paragraphs.length; i++) { paragraphs[i].style.backgroundColor = 'yellow'; } } </script> </body> </html>