Bootstrap 3 - 如果手风琴在通过ajax填充的模态中,则不会触发事件hidden.bs.collapse

Question

我有一个简单的bootstrap模式通过ajax填充.内容是由bootstrap插件Collapse制作的Accordion.如果我尝试检测hidden.bs.collapse(或任何其他可检测的事件),它将不会被触发.

http://jsfiddle.net/Diac/n2jm5cy8/

HTML

<!-- Button trigger modal -->
<a href="/echo/html/" data-remote="false" data-toggle="modal" data-target="#myModal">Launch demo modal</a>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                <h4 class="modal-title" id="myModalLabel">Modal title</h4>
            </div>
            <div class="modal-body" id="modalbody">
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
    </div>
</div>

accordion.html(通过ajax加载)

<div class='panel-group' id='accordion'>
    <div class='panel panel-default' id='panel1'>
        <div class='panel-heading'>
            <h4 class='panel-title'>
                <a data-toggle='collapse' data-parent='#accordion' href='#collapseOne'>Collapsible Group Item #1</a>
            </h4>
        </div>
        <div id='collapseOne' class='panel-collapse collapse in'>
            <div class='panel-body'> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div>
        </div>
    </div>
</div>

JavaScript的

$('a[data-toggle]').click(function(e) {
    e.preventDefault();
});

$('#myModal').on('show.bs.modal', function(event) {
    $.ajax({
        url: "accordion.html",
        success: function(responseText) {
            $("#modalbody").html(responseText);
        }
    });
});

$('.panel').on('hidden.bs.collapse', function (e) {
    alert('Event fired on #' + e.currentTarget.id);
})

Answer 1

在DOM中存在.panel类的任何元素之前,您正尝试将事件侦听器附加到具有.panel类的元素.

为了使代码正常工作,$('.panel').on(...)在.panels实际插入DOM之后,您可以在AJAX成功回调中移动内部.或者,最好也可以使用事件委托代替:

$('#modalbody').on('hidden.bs.collapse', '.panel', function (e) {
    alert('Event fired on #' + e.currentTarget.id);
});

请参阅jQuery文档中有关事件委派的讨论.

相关摘录:

事件处理程序仅绑定到当前选定的元素; 它们必须在您的代码调用.on()时存在.要确保元素存在且可以选择,请将脚本放在HTML标记中的元素之后,或者在文档就绪处理程序中执行事件绑定.或者,使用委派事件来附加事件处理程序.