jquery 获取list最后一个对象属性

<div class="vertical-timeline-block" th:each="chat:${userChatRecords}">
					<div class="vertical-timeline-icon lazur-bg">
						<i class="fa fa-chevron-down"></i>
					</div>

					<div class="vertical-timeline-content">
						<span class="vertical-date">
                         <small>[[${#dates.format(chat.chatDate,"MM月dd日 HH:mm")}]]</small>
						</span>
						<input type="hidden" class="chatDate" th:value="${#dates.format(chat.chatDate,'yyyy-MM-dd HH:mm:ss')}"/>
					</div>

					<div class="vertical-timeline-content" th:each="question:${chat.questionContent}">
						<p class="btn btn-primary btn-rounded" style="float: left;">[[${question.content}]]
						</p>
					</div>

					<div class="vertical-timeline-content">
						<p class="btn btn-warning btn-rounded">[[${chat.buttonName}]]
						</p>
					</div>

					<div class="vertical-timeline-content" th:each="tip:${chat.tipContent}">
						<p class="btn btn-danger btn-rounded btn-outline">[[${tip.content}]]
						</p>
					</div>

					<div class="vertical-timeline-content" th:each="return:${chat.returnContent}">
						<p class="btn btn-primary btn-rounded" style="float: left;">[[${return.content}]]
						</p>
					</div>
				</div>

$("input[class=chatDate]").last().val();