下面的data-hash="'data[i].datahash'"这样写为什么会报：Unexpected identifier
   要怎么获取

              $.ajax({
                type: "get",
                url: "nav.php",
                cache: false,
                dataType: "json",
                success: function(data) {
                    var data = data;
                    var html = '';
                    for (var i = 0; i < data.length; i++) {
                        html += '<p class="swiper-slide" data-hash="'data[i].datahash'">' + data[i].nav + '</p>';
                    }
                    
                    $(".swiper-wrapper").get(0).innerHTML = html;

                },
                error: function() {
                    alert("出错");
                }
            });