使用 jQuery 在 IE 中隐藏 select 选项

Hiding select options in IE with jQuery

我有 2 个 select 列表,从第一个列表中选择一个选项将决定第二个列表中的可用选项。这在 Chrome 中非常有效,但是 IE 在更改第一个 select 时无法隐藏适当的选项。正在应用 hidden class,但选项仍然可见。知道如何修改它以在 IE 中工作吗?

Fiddle

$(document).on('change', '#category', function(e) {
  if ($(this).prop('selectedIndex') == 0) {
    $('#condition option').addClass('hidden');
    $('#condition .cat-1').removeClass('hidden');
  } else if ($(this).prop('selectedIndex') == 1) {
    $('#condition option').addClass('hidden');
    $('#condition .cat-2').removeClass('hidden');
  }
});
.hidden {
  display: none !important;
}

#category {
  height: 40px;
}

#condition {
  height: 110px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<select id="category" size="2">
  <option class="cat-1">Group 1</option>
  <option class="cat-2">Group 2</option>
</select>

<select id="condition" size="2">
  <option class="cat-1">Item from group 1</option>
  <option class="cat-1">Item from group 1</option>
  <option class="cat-1">Item from group 1</option>
  <option class="cat-2">Item from group 2</option>
  <option class="cat-2">Item from group 2</option>
  <option class="cat-2">Item from group 2</option>
</select>

您可以将 select option 保存到变量,然后删除并重新添加您想要的任何变量。

// saving options
var options = $("#condition option");

$(document).on('change', '#category', function(e) {
  if ($(this).prop('selectedIndex') == 0) {
    // deleteing all options
    $("#condition").empty();
    // adding options only of class .cat-1
    options.filter(".cat-1").each(function() {
      $("#condition").append($(this));
    });
  } else if ($(this).prop('selectedIndex') == 1) {
    // deleteing all options
    $("#condition").empty();
    // adding options only of class .cat-2
    options.filter(".cat-2").each(function() {
      $("#condition").append($(this));
    });
  }
});
#category {
  height: 40px;
}

#condition {
  height: 110px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<select id="category" size="2">
  <option class="cat-1">Group 1</option>
  <option class="cat-2">Group 2</option>
</select>

<select id="condition" size="2">
  <option class="cat-1">Item from group 1</option>
  <option class="cat-1">Item from group 1</option>
  <option class="cat-1">Item from group 1</option>
  <option class="cat-2">Item from group 2</option>
  <option class="cat-2">Item from group 2</option>
  <option class="cat-2">Item from group 2</option>
</select>