我想获取父属性，但它返回未定义的jQuery

Question

这是我的代码：

 $(document).on('click', '.setting', function(e){ alert($(this).parent().data('fieldtype')); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="row" id="field"> <div class="col-md-9 col-sm-6 col-xs-6 pad" style=""> <textarea class="form-control field" name="key1" rows="3" data-fieldtype="test" data-group="">demo</textarea> </div> <div class="col-md-1 col-sm-2 col-xs-2 pad pointer movefield" data-key="1"> <div><span class="glyphicon glyphicon-arrow-up"></span></div> </div> <div class="col-md-1 col-sm-2 col-xs-2 pad pointer setting" data-key="1"> <div><span class="glyphicon glyphicon-cog">click me</span></div> </div> <div class="col-md-1 col-sm-2 col-xs-2 pad pointer field-remove" data-key="1"> <div>x</div> </div> </div> 

现在问题不在于获取data-fieldtype的值，因为此方法返回undefined 。 并建议获取data-group的值，因为目前这一空白

Answer 1

因为textarea不是.setting父级。 它的父项是#field ，您应该在其中找到textarea。

$(this).parent().find('[data-fieldtype]').data('fieldtype')

 $(document).on('click', '.setting', function(e){ console.log( $(this).parent().find('[data-fieldtype]').data('fieldtype') ); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="row" id="field"> <div class="col-md-9 col-sm-6 col-xs-6 pad" style=""> <textarea class="form-control field" name="key1" rows="3" data-fieldtype="test" data-group="">demo</textarea> </div> <div class="col-md-1 col-sm-2 col-xs-2 pad pointer movefield" data-key="1"> <div><span class="glyphicon glyphicon-arrow-up"></span></div> </div> <div class="col-md-1 col-sm-2 col-xs-2 pad pointer setting" data-key="1"> <div><span class="glyphicon glyphicon-cog">click me</span></div> </div> <div class="col-md-1 col-sm-2 col-xs-2 pad pointer field-remove" data-key="1"> <div></div> </div> </div>