jrtechs-NodeJSBlog/includes/contact.html

<div class='col-md-8'>

    <!--Form with header-->

    <form action="/contact" method="post">
        <div class="card border-primary rounded-0">
            <div class="card-header p-0">
                <div class="bg-info text-white text-center py-2">
                    <h3><i class="fa fa-envelope"></i>Contact Me</h3>
                    <p class="m-0">I would love to hear from you.</p>
                </div>
            </div>
            <div class="card-body p-3">

                <!--Body-->
                <div class="form-group">
                    <div class="input-group mb-2">
                        <div class="input-group-prepend">
                            <div class="input-group-text"><i class="fa fa-user text-info"></i></div>
                        </div>
                        <input type="text" class="form-control" id="name" name="name" placeholder="Name" required>
                    </div>
                </div>
                <div class="form-group">
                    <div class="input-group mb-2">
                        <div class="input-group-prepend">
                            <div class="input-group-text"><i class="fa fa-envelope text-info"></i></div>
                        </div>
                        <input type="email" class="form-control" id="email" name="email" placeholder="example@gmail.com" required>
                    </div>
                </div>

                <div class="form-group">
                    <div class="input-group mb-2">
                        <div class="input-group-prepend">
                            <div class="input-group-text"><i class="fa fa-comment text-info"></i></div>
                        </div>
                        <textarea class="form-control" placeholder="Message" name="message" required></textarea>
                    </div>
                </div>

                <div class="form-group">
                    <div class="g-recaptcha" data-sitekey="6LceWF8UAAAAAIsd7F6iY_Pywt4fJsJlFNPtEgi9"></div>
                </div>

                <div class="text-center">
                    <input type="submit" value="Send" class="btn btn-info btn-block rounded-0 py-2">
                </div>
            </div>

        </div>
    </form>
</div>

<script src='https://www.google.com/recaptcha/api.js'></script>

<script>
    $("form").submit(function(event) {

        var recaptcha = $("#g-recaptcha-response").val();
        if (recaptcha === "") {
            event.preventDefault();
            alert("Please check the recaptcha");
        }
    });
</script>