Javascript JQuery：获取单选按钮值
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JQuery: get radio button value
提问by StaceyH
I have the following HTML:
我有以下 HTML：
HTML:
HTML：
<input type="radio" name="abc" value="0" selected="selected" style="display:none" />
<input type="radio" name="abc" value="1" />1+
<input type="radio" name="abc" value="2" />2+
<input type="radio" name="abc" value="3" />3+
JQuery to get the selected radio button
JQuery 获取选中的单选按钮
$('input:radio[name=abc]:checked').val();
Why doesn't the code above work on page load, BEFORE a user selected a radio button? It's strange because the code above does work AFTER a user selected a radio button.
为什么上面的代码在页面加载时不起作用，在用户选择单选按钮之前？这很奇怪，因为上面的代码在用户选择一个单选按钮后确实有效。
It seems to me that I have set the default radio button value to be 0, but if you
在我看来，我已将默认单选按钮值设置为0，但是如果您
Meaning, if the radio button value is selected, return the selected value - otherwise, return 0 (when no value has been selected)
意思是，如果选择了单选按钮值，则返回所选值 - 否则，返回 0（未选择值时）
回答by ?ime Vidas
You are using the wrong attribute. For radio buttons you have to use the checkedattribute and not the selectedattribute.
您使用了错误的属性。对于单选按钮，您必须使用checked属性而不是selected属性。
<input type="radio" checked="checked">
or just:
要不就：
<input type="radio" checked>
回答by Ashish Babu
First correct the attribute to checked and remove selected attribute which is wrong and then use the following code. t will get the selected value of the radiobutton at button click. ex for list
首先更正属性以检查并删除错误的选定属性，然后使用以下代码。t 将在单击按钮时获取单选按钮的选定值。清单前列
$("#btn").click(function() {
$('input[type="radio"]:checked').val();
});
回答by Galen
Radio has the attribute checked, not selected
Radio 有这个属性checked，不是selected
<input type="radio" name="abc" value="0" checked="checked" style="display:none" />
<input type="radio" name="abc" value="1" />1+
<input type="radio" name="abc" value="2" />2+
<input type="radio" name="abc" value="3" />3+
