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La variable de rango de entrada no está definida y no se puede recopilar

tengo este formulario:

 <form name="myLoginForm" method="post"> <div class="container"> <label for="uname"><strong>Username</strong></label> <input id="uname" type="text" placeholder="Enter Username" name="uname" required> <label for="difficulty"><strong>Difficulty:</strong><br></label> <input type="range" id="difficulty" name="difficulty" min="0" max="10"> <button id="startGame" type="button">Start Game</button> </div> </form>

No puedo tomar el valor de entrada de mi rango de entrada. Esto es lo que estoy intentando ahora mismo:

 var selectedDifficulty = document.getElementById("difficulty").value var sd = parseInt(selectedDifficulty);
about 4 years ago · Juan Pablo Isaza
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