django-ajax

django-ajax.html

<polymer-element name="django-ajax" extends="core-ajax">
<script>
    Polymer({
        getCSRFCookie: function() {
            b = document.cookie.match('(^|;)\\s*csrftoken\\s*=\\s*([^;]+)');
            return b ? b.pop() : '';
        },
        ready: function() {
            this.super();
            this.headers = {
                "X-CSRFToken": this.getCSRFCookie(),
                "X-Requested-With": "XMLHttpRequest"
            };
        }
    });
</script>
</polymer-element>

X-CSRFToken allow you to use django-ajax on POST request.
X-Request-With enabled "request.is_ajax()" test on the Django side.