M3L2.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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    <title>Document</title>
</head>
<body>
    
    <h2>javascript validate input</h2>
    <p>please input a number between 1 and 10:</p>
    <input id="numb">
    <button type="button" onclick="myFunction()">Submit</button>
    <p id="demo"></p>

    <script>
    function myFunction(){
        var x, text;

        document.getElementById("numb").value;

        if(isNaN(x) || x < 1 || x > 10){
            text = "input not valid";
        }else{
            text = "input oke";
        }
        document.getElementById("demo").innerHTML = text;
    }
    </script>

</body>
</html>