source/slug.html

<!doctype html>
<html lang="en">

<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
        crossorigin="anonymous">
    <title>Radio and Checkbox</title>
</head>

<body>
    <div class="form-group">
        <label>Title</label>
        <input id="title" type="text" class="form-control" name="title" placeholder=""
            required="true" maxlength="255">
    </div>

    <div class="form-group">
        <label>Slug</label>
        <input id="slug" type="text" class="form-control" name="slug" placeholder=""
            required="true" minlength="5" maxlength="255">
    </div>


    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
        crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
        crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
        crossorigin="anonymous"></script>

    <script>
        $("#title").keyup(function () {
            var text = $(this).val();
            text = covertToSlug(text);
            $("#slug").val(text);
            $("#slug").parent().removeClass('is-empty');
        });

        function covertToSlug(text) {
            return text.toLowerCase().replace(/[^\w ]+/g, '').replace(/ +/g, '-');
        }
    </script>
</body>

</html>