Javascript实时计算从单选按钮

Javascript live calculation from radio buttons

本文关键字：单选按钮 计算 实时 Javascript      更新时间：2023-09-26

有一些单选按钮

<input type="radio" name="highlight" data-price="25.1" value="a1">a1
<input type="radio" name="highlight" data-price="55.4" value="a2">a2
<input type="radio" name="highlight" data-price="65.3" value="a3">a3
<input type="radio" name="highlight" data-price="95.9" value="a4">a4

我想打印所选单选按钮的"data-price"。我该怎么做呢?

我不知道你到底在问什么…但是如果你只想打印数据-价格，你可以这样做。

$(function(){
  $('input[type=radio]').on('click',function(){
    data= $(this).data('price');
    $('#result').text(data);
   
  });
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="radio" name="highlight" data-price="25.1" value="a1">a1
<input type="radio" name="highlight" data-price="55.4" value="a2">a2
<input type="radio" name="highlight" data-price="65.3" value="a3">a3
<input type="radio" name="highlight" data-price="95.9" value="a4">a4
<div id='result'>
</div>

HTML

<input class='radio' type="radio" name="highlight" data-price="25.1" value="a1">a1
<input class='radio' type="radio" name="highlight" data-price="55.4" value="a2">a2
<input class='radio' type="radio" name="highlight" data-price="65.3" value="a3">a3
<input class='radio' type="radio" name="highlight" data-price="95.9" value="a4">a4
<input id="price" type="text">
Javascript (onclick) 

var inputs = document.getElementsByClassName('radio');
var textbox = document.getElementById('price');
var i;
for (i = 0; i < inputs.length; i++) {
    inputs[i].onclick = function(){
        textbox.value = this.dataset.price;
    }
}
Javascript (eventListener) 

for (i = 0; i < inputs.length; i++) {
    function myFn(){
        textbox.value = this.dataset.price;
    }
    inputs[i].addEventListener("change",myFn);
}
https://jsfiddle.net/2zfjfkhL/

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