Allow only numbers in contenteditable

<!DOCTYPE html>
<html>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<h1>My Web Page</h1>

<p id="demo" contenteditable>My first paragraph.</p>

<script>
document.getElementById("demo").innerHTML = "Hello Dolly.";
</script>
<script>
$("#demo").keypress(function(e) {
    // alert('CLK')
    if (isNaN(String.fromCharCode(e.which))) e.preventDefault();
});
</script>
</body>
</html>
hygull/contenteditable-allow-only-numbers.md
