jQuery jquery中选定单选按钮的数量
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count of selected radio buttons in jquery
提问by LocustHorde
suppose I have groups of radio buttons like so:
假设我有一组单选按钮，如下所示：
<label><input type="radio" value="1" name="rdQueen" /> Scaramouche</label> <br />
<label><input type="radio" value="1" name="rdQueen" /> Will you do the</label> <br />
<label><input type="radio" value="1" name="rdQueen" /> Fandango</label> <br />
... sometime later in the page ...
......稍后在页面中......
<label><input type="radio" value="1" name="rdFruit" /> Mango</label> <br />
<label><input type="radio" value="1" name="rdFruit" /> Kiwi</label> <br />
<label><input type="radio" value="1" name="rdFruit" /> Potato</label> <br />
All I want to do is make sure atleast one of them from both group has been selected.. so I need to count the radiobuttons that have been checked, in this case it'll be 2.
我想要做的就是确保至少从两个组中选择了一个..所以我需要计算已检查的单选按钮，在这种情况下它将是 2。
Only, I am not sure how to do that. help please!
只是，我不知道该怎么做。请帮忙！
回答by AlienWebguy
To check for only those specific groups:
仅检查那些特定组：
$(':radio[name="rdQueen"]:checked, :radio[name="rdFruit"]:checked').length;
回答by Nicola Peluchetti
You could do:
你可以这样做：
var numberOfCheckedRadio = $('input:radio:checked').length
//this gives you the total of checked radio buttons on the page
回答by user113716
Use the checked-selector[docs]to get the ones that are checked, and the length[docs]property to find out how many there were.
使用checked-selector[docs]获取已检查的内容，并使用length[docs]属性找出有多少。
alert( $('input:radio:checked').length );
