[英]JQuery, getting value of checked radio button, why is this not working?
I am trying like below to get the value of a checked radio button but it just keeps giving undefined. 我正在尝试像下面这样来获取选中的单选按钮的值,但是它一直在给undefined。 I am using Firefox on Ubuntu so I don't know if its some weird quirk of the browser or what, I would appreciate any advice as this is driving me crazy:
我在Ubuntu上使用Firefox,所以我不知道它是否是浏览器的怪异怪癖,还是什么,我希望您提出任何建议,因为这会使我发疯:
<input name="tagRow_ddd" type="radio" value="p">
<input name="tagRow_ddd" type="radio" value="r">
alert($('input[name=tagRow_ddd]:checked').val())
Jfiddle: http://jsfiddle.net/fD7fP/6/ Jfiddle: http : //jsfiddle.net/fD7fP/6/
that's exactly the output it should give. 这正是它应该提供的输出。 the
:checked
selector only finds checked elements... you haven't any. :checked
选择器仅查找选中的元素...您还没有。
Because by default nothing is checked. 因为默认情况下不检查任何内容。 If you have either checked by default it works.
如果您默认选中其中任何一个,则可以使用。
You need to quote the attribute value http://api.jquery.com/attribute-equals-selector/ 您需要引用属性值http://api.jquery.com/attribute-equals-selector/
So it should be 所以应该
alert($("input[name='tagRow_ddd']:checked").val())
Try making one selected by default. 尝试默认选择一个。 Lke so
所以
<input name="tagRow_ddd" type="radio" value="p">
<input name="tagRow_ddd" type="radio" value="r">
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