Question

如何检查select2.js是否至少选择了一个选项？

下面的代码显示消息“请在列表中选择至少一个项目”。即使选择了一个项目。

$('form.validate-form').validator({
    disable: false
});

$( "select.validate" ).each(function() {
    $(this).validator();
    $(this).get(0).setCustomValidity('Please select at least one item in the list.');
});

如何发出消息'请在列表中选择至少一个项目'。选择至少一个选项后消失？

我正在使用Bootstrap验证器插件。

jsfiddle

Answer 1

有点像这样

    <!DOCTYPE html>

    <head>
      <meta charset="utf-8">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
      <link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>
      <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
     <link href="//cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/css/select2.min.css" rel="stylesheet" />
     <script src="//cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/js/select2.min.js"></script>
     <script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.12.0/jquery.validate.min.js" type="text/javascript"></script>

   <style>
.mySelect {
    width: 300px;
}
  </style>
    </head>
    <body>
      <form id="myform">

      <select multiple="true" class="mySelect" name="item" required>
              <option value="AL">Alabama</option>
              <option value="Am">Amalapuram</option>
              <option value="An">Anakapalli</option>
              <option value="Ak">Akkayapalem</option>
              <option value="WY">Wyoming</option>
          </select>
            <input type="submit" name='submit' value="Submit">
      </form>
      <script>
      $(document).ready(function() {
        $(".mySelect").select2();


        $("#myform").validate(
              {
                rules: 
                {
                  item: 
                  {
                    required: true
                  }
                }
              });   
      });
      </script>

    </body>
    </html>

select2.js检查是否至少选择了一个选项

1 个答案: