Javascript 如果类满足某些条件，如何在没有调用模式的情况下首先调用它？

演示和完整代码如下所示：

<!-- Button trigger modal -->
<button class="btn btn-primary btn-lg check_session" data-toggle="modal" data-target="#myModal">Launch demo modal</button>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                 <h4 class="modal-title" id="myModalLabel">Modal title</h4>

            </div>
            <div class="modal-body">
                <div class="col-md-12">
                    <div class="row">
                        <label for="idTourDateDetails">Tour Start Date:</label>
                        <div class="form-group">
                            <div class="input-group">


                            </div>
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                </div>
            </div>
        </div>
        <!-- /.modal-content -->
    </div>
    <!-- /.modal-dialog -->
</div>
<!-- /.modal -->

$(".check_session").click(function(){
        $.ajax({ 
            success : function(response)
            {
                response = 'no_session';
                if(response != 'exist_session')
                {
                    alert('Please login');
                }
            }
        })
    });

我的HTML代码如下所示：

<!-- Button trigger modal -->
<button class="btn btn-primary btn-lg check_session" data-toggle="modal" data-target="#myModal">Launch demo modal</button>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                 <h4 class="modal-title" id="myModalLabel">Modal title</h4>

            </div>
            <div class="modal-body">
                <div class="col-md-12">
                    <div class="row">
                        <label for="idTourDateDetails">Tour Start Date:</label>
                        <div class="form-group">
                            <div class="input-group">


                            </div>
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                </div>
            </div>
        </div>
        <!-- /.modal-content -->
    </div>
    <!-- /.modal-dialog -->
</div>
<!-- /.modal -->

$(".check_session").click(function(){
        $.ajax({ 
            success : function(response)
            {
                response = 'no_session';
                if(response != 'exist_session')
                {
                    alert('Please login');
                }
            }
        })
    });

当

响应时！='存在会话“

，我希望系统显示警报消息而不显示模式。因此，仅显示警报消息

有什么办法解决我的问题吗

---

谢谢

您删除了数据切换按钮和数据目标按钮

<button class="btn btn-primary btn-lg check_session">Launch demo modal</button>

工作演示