从下拉列表中获取未使用 jquery 选择的值列表
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Get list of values from dropdown that are NOT selected using jquery
提问by Amanda Kitson
I have two related dropdowns.
我有两个相关的下拉列表。
When the user selects an option from the first drop down, the second drop down is populated with a list of all the options from the first drop down that were NOT selected.
当用户从第一个下拉列表中选择一个选项时，第二个下拉列表将填充第一个下拉列表中未选择的所有选项的列表。
I'm trying to use jquery to get all the not selected options, but I'm still a jquery newb and must be mising something.
我正在尝试使用 jquery 来获取所有未选中的选项，但我仍然是 jquery 新手，一定是缺少某些东西。
I am trying the following:
我正在尝试以下操作：
$('#segmentCrossStreet1:not(:selected)')
This is where "segmentCrossStreet1" is the ID of the first drop down. This doesn't appear to return anything useful. What am I doing wrong?
这就是“segmentCrossStreet1”是第一个下拉列表的 ID。这似乎没有返回任何有用的东西。我究竟做错了什么？
回答by Rob W
Fiddle: http://jsfiddle.net/uzhWS/(this fiddle also shows how to pupulate another <select>)
小提琴：http: //jsfiddle.net/uzhWS/（这个小提琴也展示了如何化身另一个<select>）
You have to select the <option>elements, rather than the "selected <select>" elements:
您必须选择<option>元素，而不是“选定的<select>”元素：
$('#segmentCrossStreet1 option:not(:selected)');
回答by Blender
Your current selector:
您当前的选择器：
$('#segmentCrossStreet1:not(:selected)')
Searches for all #segmentCrossStreet1elements that are not selected. Is this what you want? I doubt it. Add a space before :not(to search for childelements:
搜索所有#segmentCrossStreet1未选择的元素。这是你想要的吗？我对此表示怀疑。在:not(搜索子元素之前添加一个空格：
$('#segmentCrossStreet1: not(:selected)')
Better if you made it more specific:
如果你让它更具体，那就更好了：
$('#segmentCrossStreet1: option:not(:selected)')
