如何获取所选单选按钮的值?

我想从一组单选按钮中获得选定的值。

这是我的HTML:

<div id="rates">
  <input type="radio" id="r1" name="rate" value="Fixed Rate"> Fixed Rate
  <input type="radio" id="r2" name="rate" value="Variable Rate"> Variable Rate
  <input type="radio" id="r3" name="rate" value="Multi Rate" checked="checked"> Multi Rate  
</div>

这是我的js:

var rates = document.getElementById('rates').value;
var rate_value;
if(rates =='Fixed Rate'){
    rate_value = document.getElementById('r1').value;
    
}else if(rates =='Variable Rate'){
    rate_value = document.getElementById('r2').value;
    
}else if(rates =='Multi Rate'){
    rate_value = document.getElementById('r3').value;
}  

document.getElementById('results').innerHTML = rate_value;

我一直没有定义。

当前回答

你可以使用.find()来选择选中的元素:

var radio = Array.from(document.querySelectorAll('#rate input'))

var value = radio.length && radio.find(r => r.checked).value

2016-10-18 11:16:07

其他回答

如果你正在使用JQuery，请使用下面的单选按钮组片段。

var radioBtValue= $('input[type=radio][name=radiobt]:checked').val();

2017-06-28 10:21:23

我使用了jQuery。点击function获得所需的输出:

$('input[name=rate]').click(function(){
  console.log('Hey you clicked this: ' + this.value);

  if(this.value == 'Fixed Rate'){
    rate_value = $('#r1').value;
  } else if(this.value =='Variable Rate'){
   rate_value = $('#r2').value;
  } else if(this.value =='Multi Rate'){
   rate_value = $('#r3').value;
  }  

  $('#results').innerHTML = rate_value;
});

希望能有所帮助。

2017-04-28 07:27:59

还可以在元素上使用forEach-loop循环遍历按钮

    var elements = document.getElementsByName('radioButton');
    var checkedButton;
    console.log(elements);
    elements.forEach(e => {
        if (e.checked) {
            //if radio button is checked, set sort style
            checkedButton = e.value;
        }
    });

2019-12-07 00:05:17

var rates=document.getElementsByName("rate"); for (i = 0; i < rates.length; i++) { if (rates[i].checked) { console.log(rates[i].value); rate=rates[i].value; document.getElementById("rate").innerHTML = rate; alert(rate); } } <div id="rates"> <input type="radio" id="r1" name="rate" value="Fixed Rate"> Fixed Rate <input type="radio" id="r2" name="rate" value="Variable Rate"> Variable Rate <input type="radio" id="r3" name="rate" value="Multi Rate" checked="checked"> Multi Rate </div> </br> <div id='rate'> </div>

2019-01-23 09:58:37

<form id="rates">
  <input type="radio" name="rate" value="Fixed Rate"> Fixed
  <input type="radio" name="rate" value="Variable Rate"> Variable
  <input type="radio" name="rate" value="Multi Rate" checked> Multi
</form>

然后……

var rate_value = rates.rate.value;

2017-01-15 00:06:34

如何获取所选单选按钮的值?

推荐文章

最新文章

标签