javascript - bootstrap-select 隐藏事件未触发

Question

我想弄清楚为什么在关闭 bootstrap-select 时无法触发关闭事件。

$(function() {
    
$('.selectpicker').on('hide.bs.dropdown', function () {
    alert('hide.bs.dropdown');
})
  
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<link href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/css/bootstrap.css" rel="stylesheet"/>
<link href="//cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.7.2/css/bootstrap-select.css" rel="stylesheet"/>

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/js/bootstrap.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.7.2/js/bootstrap-select.js"></script>

<select class="selectpicker" multiple="true"  data-done-button="true"  data-live-search="true">
  <option>Mustard</option>
  <option>Ketchup</option>
  <option>Relish</option>
</select>

Answer 1

hide.bs.dropdown事件绑定(bind)到选择器的父级，而不是选择器本身，因此您需要:

$(function() {
    
$('#selectpicker-container').on('hide.bs.dropdown', function () {
    alert('hide.bs.dropdown');
})
  
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<link href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/css/bootstrap.css" rel="stylesheet"/>
<link href="//cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.7.2/css/bootstrap-select.css" rel="stylesheet"/>

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/js/bootstrap.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.7.2/js/bootstrap-select.js"></script>

<div id="selectpicker-container">
     <select class="selectpicker" multiple="true"  data-done-button="true"  data-live-search="true">
        <option>Mustard</option>
        <option>Ketchup</option>
        <option>Relish</option>
    </select>
</div>