Question

我有一个带有复选框的多选下拉列表（jquery includeSelectAllOption），我只想要最后选择的值而不是所有选中的复选框值。

<select class="form-control" id="change_city" multiple="multiple">
  <?php foreach ($city_array as $key => $value) {
     # code...
      echo "<option value=".$value['city_id'].">".$value['city_name']."</option>";
  } ?>
</select>

<script>
    $(function() {
        $('#change_city').multiselect({
            includeSelectAllOption: true
        });
    });

</script>

Answer 1

那么，只需将其作为额外选项并删除includeSelectAllOption即可。当用户点击＆＃34;选择全部＆＃34;时，取消选择所有其他选项并保持＆＃34;全选＆＃34;。

＆＃13;

var handler = function(){
  let val = $(this).val();
  if(val === null) return;
  val.forEach(function(value){
    if(value == "all"){
        $("#change_city option:selected").prop("selected", false);
        $('#change_city option[value="all"]').prop('selected', true); 
    }
  });
}

$("#change_city").on("change", handler);

＆＃13;

#change_city {
  height: 150px;
  }

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="form-control" id="change_city" multiple="multiple">
  <option value="1">City 1</option>";
  <option value="2">City 2</option>";
  <option value="3">City 3</option>";
  <option value="4">City 4</option>";
  <option value="all">Select All</option>";
</select>

＆＃13;

Answer 2

见下面的代码我希望可以帮到你

<label>Country:</label>
    <select class="country" multiple="multiple" size="5">
        <option>United States</option>
        <option>India</option>
        <option>United Kingdom</option>
        <option>Brazil</option>
        <option>Germany</option>
    </select>
    <button type="button">Get Values</button>



<script type="text/javascript">
$(document).ready(function() {
$("button").click(function(){
    var countries = [];
    $.each($(".country option:selected"), function(){            
        countries.push($(this).val());
    });
    //countries.join(", ")
    alert("You have selected the country - " + countries.slice(-1)[0]);
});
});
</script >

如何在jquery中获取多选复选框值

2 个答案: