Jquery chained选择了我做错了什么的任何线索？

Question

我正在使用data attr进行选择，我想根据第一个select的data属性进行过滤。这是我的代码，请让我知道什么？请原谅我代码的混乱，我是一个javascript/Jquery新手

html块/

<select id="selectOne">
                    <option data-team='{"team":"Engineering"}'>Engineering </option>
                    <option   data-team='{"team": "Software"}'>Software Development</option>
                    <option data-team='{"team": "HumanResources"}'>Human Resources</option>
                    <option  data-team='{"team": "MarkettingAndSales"}'>Marketting and Sales</option>
                    <option  data-team='{"team": "Administrative"}'>Administrative</option>
                    <option  data-team='{"team": "Others"}' class="others">Others</option>
                </select>

                <select id="selectTwo">
                    <option  class="two" data-Speciality='{"team": "Software", "Speciality": "WebDevelopment"}'>Web Development </option>
                    <option  class="two" data-Speciality='{"team": "Engineering", "Speciality": "WebApplication"}'>Application Development </option>
                    <option  class="two" data-Speciality='{"team": "Software", "Speciality": "WebDevelopment"}'>UI/UX Design</option>
                    <option  class="two" data-Speciality='{"team": "Others", "Speciality": "ScientificResearch"}'>Scientific / Research</option>
                    <option  class="two" data-Speciality='{"team": "Engineering", "Speciality": "ScientificResearch"}'>Computer Hardware / Networking</option>
                    <option class="two" data-Speciality='{"team": "Others", "Speciality": "Others"}'>Others</option>
                </select>

$(function(){
    // function to use ajax calls to filter the table data depending on the select forms value
            $("#selectOne").change(function() {
                $("#selectTwo").hide();
                var selected = $(this).find('option:selected');
                $('#selectTwo option [data-team===selected]').show();



            console.log( $(selected).data('team') );

            //the filtering mechanism based on the class
         });

/显然我没有得到第二个select的值为什么？

$(function(){
    // function to use ajax calls to filter the table data depending on the select forms value
        $("#selectOne").change(function() {
    var selected=$(this).find('option:selected').data('team').teamName;
    console.log(selected);
    var selectTwo= $('#selectTwo').val().data('Speciality').team;
     console.log(selectTwo);

})

Answer 1

您不能那样显示/隐藏option，至少不能在每个浏览器中显示/隐藏。

你必须主动地操作DOM，比如根据你的过滤器逻辑移除和添加元素，这样你就只能用简单的jQuery把事情搞得一团糟。

如果您需要这样的功能，我会使用任何可以将数据从UI客户端解耦的功能：here you can find许多解决方案。

Answer 2

我认为，你想要的是：

var selected = $(this).val();    
$('#selectTwo').val(selected).show();

不确定您所期望的是什么。