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<!DOCTYPE html> <html> <head> <title>Title of the Document</title> </head> <body> <ol id="ol"> <li>One</li> <li>Two</li> <li>Three</li> </ol> <script> ol.before('before'); // insert string "before" before <ol> ol.after('after'); // insert string "after" after <ol> let li1 = document.createElement('li'); li1.innerHTML = 'prepend'; ol.prepend(li1); // insert li1 at the beginning of <ol> let liLast = document.createElement('li'); liLast.innerHTML = 'append'; ol.append(liLast); // insert liLast at the end of <ol> </script> </body> </html>