<div class="btn btn-success btn-xs" id="page_tag_add" data-id="{{ pagedata['page'].id }}">
<i class="fa fa-plus"></i>
</div>

<script>
function get_template(name, tag_id, formData) {
    console.log(formData);
    $.ajax({
        method: 'POST',
        url: '/template/' + name,
        data: formData,

        success: function(result) {
            $(document).find( "#" + tag_id ).append( result );
        }
    });
}
$( "#page_tag_add" ).on( "click", function() {
    get_template("page_tag_add", "addtag", {'id': $( "#page_tag_add" ).data( 'id' )} );
});
</script>

<div id="addtag"></div>