Javascript 如何在没有表单的情况下遍历单选按钮组？
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How to loop through a radio buttons group without a form?
提问by Bart
How do I loop through a radio buttons group without a form in JavaScript or jQuery?
如何在没有 JavaScript 或 jQuery 表单的情况下遍历单选按钮组？
回答by Daniel Vassallo
What about something like this? (using jQuery):
这样的事情怎么办？（使用jQuery）：
$('input:radio').each(function() {
if($(this).is(':checked')) {
// You have a checked radio button here...
}
else {
// Or an unchecked one here...
}
});
You can also loop through all the checked radio buttons like this, if you prefer:
如果您愿意，您还可以循环浏览所有选中的单选按钮：
$('input:radio:checked').each(function() {
// Iterate through all checked radio buttons
});
回答by bmaupin
...in case someone wants to do this without jQuery (since it was part of the question):
...如果有人想在没有 jQuery 的情况下执行此操作（因为它是问题的一部分）：
I'm not sure what you mean by without a form. If you mean you don't want to pass the form element to a javascript function, you could do it like this:
我不确定你所说的没有表格是什么意思。如果您的意思是不想将表单元素传递给 javascript 函数，您可以这样做：
for (var i = 0; i < document.form_name.radio_name.length; i++) {
if (document.form_name.radio_name[i].checked) {
// ...
}
}
If you mean without a form as in you have no form node, you could wrap them in a span (or a div) and use code like this:
如果您的意思是没有表单，因为您没有表单节点，则可以将它们包装在一个跨度（或一个 div）中并使用如下代码：
var span = document.getElementById("span_id");
var inputs = span.getElementsByTagName("input");
for (var i = 0; i < inputs.length; ++i) {
if (inputs[i].checked) {
// ...
}
}
回答by Razor Storm
I can't be too sure what you mean but if you want to do something to all radio buttons on a page you can do this:
我不太确定你的意思，但如果你想对页面上的所有单选按钮做一些事情，你可以这样做：
$("input:radio").each(function(){
//do something here
});
