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<!DOCTYPE html> <html> <body> <ul aria-label="ul"> <li aria-label="item1">Item 1</li> <li aria-label="item2">Item 2</li> </ul> </div> <script> function go() { var item3 = document.createElement('li'); item3.textContent = 'Item 3'; item3.setAttribute('aria-label', 'item3'); document.querySelector('ul').appendChild(item3); } </script> </body> </html>