检查单选按钮是否存在jQuery [英] Check if radio button exists jQuery

问题描述

我根据某个值将单选按钮的选中状态设置为true;

I am setting a radio button's checked state to true based on a certain value;

 var radioValue = data.Activity.Answer == "Please add your answer" ? "valueA" : data.Activity.Answer;
$("input[name=optionRadio" + currentIndex + "][value=" + radioValue + "]").attr('checked', true);

我最好的方法是检查幻灯片上的单选按钮是否真的存在于手中？

What will be the best way for me to check that that radio button actually exists on the slide before hand?

推荐答案

您可以查看要查找的jQuery对象的长度它出来了：

You can check the length of the jQuery object to find it out:

if($("input[name=optionRadio" + currentIndex + "]").length > 0 ){
     // Radio button actually exists...
}

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