Question

我的网页上有一个表格如下：

<form id="numberForm">
<input type="radio" name="number" value="singular"> singular <br>
<input type="radio" name="number" value="plural"> plural <br>
</form>

如何在Javascript中提取当前所选单选按钮的值（没有提交操作）？

我喜欢的是以下内容：

var formInput = document.getElementById("numberForm");
var numberInputValue = formInput.SELECTEDBUTTON.value;

Answer 1

试试这个（在JS中使用querySelector）：

＆＃13;

function getSel() {
var formInput = document.getElementById("numberForm");
var rb=formInput.querySelector('[type="radio"]:checked'); //get selected radio button
document.getElementById('spVl').innerHTML = 'Selected value = '+rb.value;
}

＆＃13;

<form id="numberForm">
<input type="radio" name="number" value="singular"> singular <br>
<input type="radio" name="number" value="plural"> plural <br>
<input type="button" value="Get selected radio button value" onclick="getSel();" /><br>
<span id="spVl"></span>
</form>

＆＃13;

Answer 2

var form = document.getElementById('numberForm');
var radios = form.getElementsByTagName('input');

for(var i = 0; i < radios.length; ++i) {
  if(radios[i].checked) {
    console.log("Radio button '" + radios[i].value + "' is checked");
  }
}

使用Javascript拉取单选按钮值

2 个答案: