Question

我试图获取菜单选项（下拉菜单）的文本值。到目前为止，我已经尝试过但没有成功;

var dropD=  $('<div class="btn-group" style="right: 10px; margin: 0 auto; position: absolute"> <button class="btn fontSize btn-default dropdown-toggle" type="button" id="dropdownMenu1" style="border:none; background-color:transparent" data-toggle="dropdown" aria-expanded="true">Font-Size<span class="caret"></span></button></div>').appendTo(body);
       var ul= $('<ul class="dropdown-menu" role="menu" style="min-width:10px; margin-left:30px"aria-labelledby="dropdownMenu1">').appendTo(dropD);
       $('<li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">10</a></li>').appendTo(ul);
       $(' <li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">12</a></li>').appendTo(ul);
       $(' <li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">14</a></li>').appendTo(ul);
       $(' <li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">16</a></li>').appendTo(ul);

下拉列表的EventListener，

$('#dropdownFloorplanGroups').on('click', 'li a', function(e) {
    alert($(this).text());                
});

有什么想法吗？

Answer 1

您正在将事件附加到错误的元素。尝试

$('.dropdown-menu').on('click', 'li a', function(e) {
    alert($(this).text());                
});

之前没有工作的原因是双重的

您尝试使用#访问类。应该使用.
班级dropdownFloorplanGroups本身就是 li。您应该从父容器委派

＆＃13;

var dropD = $('<div class="btn-group" style="right: 10px; margin: 0 auto; position: absolute"> <button class="btn fontSize btn-default dropdown-toggle" type="button" id="dropdownMenu1" style="border:none; background-color:transparent" data-toggle="dropdown" aria-expanded="true">Font-Size<span class="caret"></span></button></div>').appendTo('body');
var ul = $('<ul class="dropdown-menu" role="menu" style="min-width:10px; margin-left:30px"aria-labelledby="dropdownMenu1">').appendTo(dropD);
$('<li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">10</a></li>').appendTo(ul);
$(' <li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">12</a></li>').appendTo(ul);
$(' <li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">14</a></li>').appendTo(ul);
$(' <li class="dropdownFloorplanGroups" role="presentation"><a role="menuitem" tabindex="-1" href="#">16</a></li>').appendTo(ul);
$('.dropdown-menu').on('click', 'li a', function(e) {
  alert($(this).text());
});

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

＆＃13;

下拉菜单EventListener

1 个答案: