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<section id="J_List">
    <div id="J_ListContent"></div>
</section>

<script>
    $('#J_List').pullRefresh({
        initLoad: true,
        loadFunction: function () {
            var def = $.Deferred();

            $.ajax({
                url: '/获取数据方法',
                dataType: 'json',
                success: function (ret) {
                    /* 假设ret.list为后端返回的列表数组 */

                    $('#J_ListContent').prepend(ret.list + '将数据拼接成html');

                    var tipStr = ret.length > 0 ? '为您更新了' + ret.length + '条内容' : '已是最新内容';

                    YDUI.dialog.toast(tipStr, 'none', 1500);

                    /* 处理完后调用resolve()方法 */
                    def.resolve();
                }
            });

            return def.promise();
        }
    });
</script>