获取bootstrap-select中的当前值

Question

我曾经e.target.value从bootstrap-select中检索当前选定的值,但是它返回了第一个选择的值,即警报保持显示项目1,当项目1和项目2被选中时,即使项目2是最近选择的.

如何获取最近选择的值以及如何选择选择的选项？

   <select multiple class="selectpicker" multiple data-selected-text-format="count > 1">
    <option value="item 1">Item 1</option>
    <option value="item 2">Item 2</option>
    <option value="item 3">Item 3</option>
    <option value="item 4">Item 4</option>
    <option value="item 5">Item 5</option>

$('.selectpicker').change(function (e) {
    alert(e.target.value);
});

Answer 1

我认为这样的答案可能更容易理解:

$('#empid').on('click',function() {
  alert($(this).val());
  console.log($(this).val());
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<select id="empid" name="empname" multiple="multiple">
  <option value="0">item0</option>
  <option value="1">item1</option>
  <option value="2">item2</option>
  <option value="3">item3</option>
  <option value="4">item4</option>
</select>
<br />
Hold CTRL / CMD for selecting multiple fields

如果在列表中选择"item1"和"item2",则输出将为"1,2".

Answer 2

而不是e.target.value,你可以使用$(this).find("option:selected").text();

 $('.selectpicker').change(function () {
        var selectedItem = $('.selectpicker').val();
        alert(selectedItem);
    });

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
<script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>


<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-select@1.13.9/dist/css/bootstrap-select.min.css">

<!-- Latest compiled and minified JavaScript -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap-select@1.13.9/dist/js/bootstrap-select.min.js"></script>


<select class="selectpicker" multiple data-selected-text-format="count > 1">
	<option value="1">Item 1</option>
	<option value="2">Item 2</option>
	<option value="3">Item 3</option>
	<option value="4">Item 4</option>
	<option value="5">Item 5</option>
</select>

Answer 3

$('.selectpicker').on('change', function(){
    var selected = []
    selected = $('.selectpicker').val()
    console.log(selected); //Get the multiple values selected in an array
    console.log(selected.length); //Length of the array
});

Answer 4

根据这篇文章，您应该执行以下操作：

$('.selectpicker').on('changed.bs.select', function (e) {
    var selected = e.target.value;
});

Answer 5

这是解决方案：

$('#payment_method').on('hidden.bs.select', function (e) {
  // console.log(e.target.value);

  console.log(e.target.selectedOptions.length);

$.each( e.target.selectedOptions , function( index, obj ){
    console.log(obj.value);
});

});

您获得了选择的长度，因此可能对 for 循环有所帮助

console.log(e.target.selectedOptions.length);

您也可以遍历选定的值：

$.each( e.target.selectedOptions , function( index, obj ){
    console.log(obj.value);
});