如何在jQuery中预选单选按钮 [英] How to pre-select a radio button in jQuery

问题描述

我想预选以下集合中的第一个单选按钮:

I want to pre-select the first radio button in the following set:

HTML

<input type="radio" value="0" name="serviceNoteType[1]">
<input type="radio" value="1" name="serviceNoteType[1]">

jQuery

var i = 1; // for sake of this example
$('[name="serviceNoteType\\['+ i +'\\]"]').prop('checked', true);

结果是第二个单选按钮被选中，而我希望第一个被选中.如何定位第一个单选按钮?

The result is that the second radio button gets selected and I want the first one selected. How to I target the first radio button?

推荐答案

您可以将.first()添加到选择器:

You can add .first() to your selector:

var i = 1; // for sake of this example
$('[name="serviceNoteType\\['+ i +'\\]"]').first().prop('checked', true);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="radio" value="0" name="serviceNoteType[1]">
<input type="radio" value="1" name="serviceNoteType[1]">

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