example_app/templates/layouts/base.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>
        {% block title %}
            My app | {% block jsondash_title %}{% endblock %}
        {% endblock %}
    </title>
    <!-- VENDOR CSS -->
    <link rel="stylesheet" href="{{ url_for('static', filename='css/vendor/bootstrap.min.css') }}">
    {% block jsondash_css %}{% endblock %}
</head>
<body>
    <div class="container-fluid">
        <div class="row">
            <div class="col-md-12">
                <div class="well text-center">
                    <h4><strong>Flask JSONDASH example app.</strong> <br><small>A place to demonstrate how to use the blueprint.</small></h4>
                </div>
                {% with messages = get_flashed_messages() %}
                    {% if messages %}
                        {% for category, message in get_flashed_messages(with_categories=True) %}
                            <div class="alert alert-{{ 'danger' if category == 'error' else 'info' }}">
                                <p class="flash">{{ 'Error: ' if category == 'error' else '' }}{{ message }}</p>
                            </div>
                        {% endfor %}
                    {% endif %}
                {% endwith %}
                {% block jsondash_body %}{% endblock %}
            </div>
        </div>
    </div>
    <!-- VENDOR JS -->
<script src="{{ url_for('static', filename='js/vendor/jquery.min.js') }}"></script>
<script src="{{ url_for('static', filename='js/vendor/bootstrap.min.js') }}"></script>
{% block jsondash_scripts %}{% endblock %}
{% block jsondash_init %}{% endblock %}
{% block jsondash_api_scripts %}
{#
<script>
    $(document).ready(function(){
        if(!window.jsondash) return;
        jsondash.api.registerCallback('chart-id-here', function(container, config, myargs){
        }, ['Hello world']);
    });
</script>
#}
{% endblock %}
</body>
</html>