function f1() { var num, out; num = document.getElementById('mynum').value; out = document.getElementById('out'); if (num == prNum) { out.innerHTML = "Вы угадали"; } else if (num > prNum) { out.innerHTML = "Загаданое число меньше"; } else { out.innerHTML = "Загаданое число больше" } } var prNum, tempOut; prNum = Math.floor( (Math.random() * 10) + 2); tempOut = document.getElementById('temp-out'); tempOut.innerHTML += prNum; 
 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Game</title> <script src="main.js"></script> </head> <body> <p>Введите число: <input type="text" id="mynum"></p> <button onclick="f1()">Угадать</button> <hr> <p id="out"></p> <p id="temp-out"></p> </body> </html>

    1 answer 1

    Found what the error. In HTML: <script src="main.js"></script> , you need to add defer in order to load JS after HTML: <script src="main.js" defer></script>