jQuery 如何删除 :selected 属性并正确添加新属性
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jQuery how to remove :selected attribute and add new one properly
提问by Somebody
How do I remove :selectedattribute and add new one?
如何删除:selected属性并添加新属性？
采纳答案by Nick Craver
回答by scunliffe
You want something like
你想要类似的东西
$('#mySelect option:selected').removeAttr('selected');
$('#mySelect option:nth-child(5)').attr('selected','selected');//select the one you want
btw, are you talking about a select list single (e.g. dropdown)?... or a select multiple? - you'll need to adjust accordingly if this is a multi-select.
顺便说一句，您是在谈论单个选择列表（例如下拉列表）吗？...还是选择多个？- 如果这是一个多选，您需要相应地进行调整。
I updated the nth child selector... when setting the selected attribute as square bracket notation [4] doesn't work in the selector.
我更新了第 n 个子选择器......当将 selected 属性设置为方括号表示法 [4] 在选择器中不起作用。
回答by Glenn Gordon
If it is a multi-select and you need to remove the selectedfrom all rows, you can use the following:
如果是多选并且需要selected从所有行中删除，则可以使用以下内容：
$("#mySelect option:selected").each(function () {
$(this).removeAttr('selected');
});
The first clause fetches all of the selected options, while the eachiterates through them, and the removeAttr eliminates the 'selected'.
第一个子句获取所有选定的选项，同时each遍历它们，removeAttr 消除“选定”。
