Редактирование кода:
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<!DOCTYPE html> <html> <body> <select size="2"> <option id="myOption" label="Mercedes">Mercedes (Mercedes-Benz)</option> <option label="Volvo">Volvo (Latin for "I roll")</option> </select> <p>Click the button to return the value of the label attribute of the Mercedes option.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myOption").label; document.getElementById("demo").innerHTML = x; } </script> </body> </html>