Question

我在这里很新，所以这个问题对您来说似乎很愚蠢。

我有一个网站，其中显示了一些复选框。这些复选框具有一些需要与价格相加的值，并且还具有需要在div中显示的文本。

Here's the demo website，如您所见，复选框需要将自己的价格与橙色pices（它们具有两个不同的divs）相加，然后将值插入div内与id=plus-display。

就目前而言，我猜到了这种解决方案，但它根本无法正常工作。

var basicPrice = 784 ; // This is how we start
function getCheck() {
var currentPrice = basicPrice; // every time
 CurrentPrice = basicPrice,
   plus = [],
   total = 0;
   console.log(currentPrice)
  $("input[id^=plus]").each(function() {
    if (this.checked) {
      total += +this.value;
      plus.push($("[for=" +this.id + "]").html()); // get the label text
    }
  });

 $("#plus-display").html(plus.join(", "));
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span id="rata-display-1" class="span text-sottotitolo_dimensione _2 rata checkout">784 €</span>

<br> <br><br>

<div id="plus-display" class="text_piccolo black checkout">PLUS:<strong>place in which display the name of the checkboxes</strong></div>

<br><br><br>

<span id="rata-display-2" class="prezzo-checkout">784 €</span>

<br><br><br>

<form id="plus" name="plus" data-name="plus" class="form-5">
          <div class="plus-wrapper interior-pack w-checkbox"><input type="checkbox" id="interior-pack" name="interior-pack" data-name="interior-pack" value="25" class="check-plus w-checkbox-input"><label for="interior-pack" class="checkout-text w-form-label"><strong>Interior Pack<br></strong>+25 € al mese</label></div>
          <div class="plus-wrapper domotica w-checkbox"><input type="checkbox" id="domotica" name="domotica" data-name="domotica" value="7" class="check-plus w-checkbox-input"><label for="domotica" class="checkout-text w-form-label"><strong>Sicurezza Domotica<br>‍</strong>+7 € al mese</label></div>
          <div class="plus-wrapper security w-checkbox"><input type="checkbox" id="security-plus" name="security-plus" data-name="security-plus" value="9" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Security Plus<br>‍</strong>+9 € al mese</label></div>
          <div class="plus-wrapper emotion w-checkbox"><input type="checkbox" id="emotion" name="emotion" data-name="emotion" value="15" class="check-plus w-checkbox-input"><label for="emotion" class="checkout-text w-form-label"><strong>Emotion<br>‍‍</strong>+15 € al mese</label></div>
          <div class="plus-wrapper box-auto w-checkbox"><input type="checkbox" id="box-auto" name="box-auto" data-name="box-auto" value="123" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Box Auto<br>‍‍</strong>+123 € al mese</label></div>
          <div class="plus-wrapper assicurazione w-checkbox"><input type="checkbox" id="assicurazione" name="assicurazione" data-name="assicurazione" value="4" class="check-plus w-checkbox-input"><label for="assicurazione" class="checkout-text w-form-label"><strong>Assicurazione<br>‍</strong>+4 € al mese</label></div>
          <div class="plus-wrapper wellness w-checkbox"><input type="checkbox" id="wellness" name="wellness" data-name="wellness" value="45" class="check-plus w-checkbox-input"><label for="wellness" class="checkout-text w-form-label"><strong>Wellness<br>‍‍</strong>+45 € al mese</label></div>
          <div class="plus-wrapper outdoor w-checkbox"><input type="checkbox" id="outdoor" name="outdoor" data-name="outdoor" value="36" class="check-plus w-checkbox-input"><label for="outdoor" class="checkout-text w-form-label"><strong>Outdoor Pack<br>‍</strong>+36 € al mese</label></div>
</form>

Answer 1

纯JS解决方案：

const form = document.getElementsByTagName("form")[0]

form.addEventListener("click", (e) => { // taking advantage of eventBubbling here
  const target = e.target

  if(String(target).toLowerCase().includes("input")) { // naive check if clicked element is input - you should implement better check most probably
    const clickedCheckboxValue = parseFloat(target.value)
    const currentSumElement = document.querySelector("#sum") 
    const currentSum = parseFloat(currentSumElement.innerText)    

    currentSumElement.innerText = target.checked
      ? currentSum + clickedCheckboxValue 
      : currentSum - clickedCheckboxValue 
  }
})

此代码何时被触发？您这里没有eventListener，您的代码中是否有此代码？

很高兴知道如何触发此方法的上下文。

通常，我会建议使用其他方法：

将事件监听器添加到每个复选框（或它们的公共父复选框，以便您可以利用eventBubbling-这是常见的情况）
点击时，检查是否单击复选框为：
- 已选中-您应该添加总和
- 未选中-您应从总和中减去
获取复选框旁边的值
加/减总和

还请详细描述应该发生的情况。例如在#someID上单击获取.someClassName中的值，并将其添加/减去为#someOtherID中的值

codepen中的草图：

https://codepen.io/anon/pen/mGaVoe

Answer 2

我刚刚创建了一个简单的解决方案。可能会更容易。步骤如下：

在您添加到所有复选框（“我假设check-plus是可用于仅复选框”）
在click事件中，只需调用.each jQuery并计算总和并显示总和。.

请查看代码示例以正确理解。

$('.check-plus').click(function(e){
let sum = 784; // Base Price
	$(":checked").each(function(){
     //   console.log($(this).val());
        sum = sum + Number($(this).val());
     //   console.log("Total Amount :",sum);
    });
  $('#display').html("Total Amount is : "+sum+"€");  
    
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


<form id="plus" name="plus" data-name="plus" class="form-5">
          <div class="plus-wrapper interior-pack w-checkbox"><input type="checkbox" id="interior-pack" name="interior-pack" data-name="interior-pack" value="25" class="check-plus w-checkbox-input"><label for="interior-pack" class="checkout-text w-form-label"><strong>Interior Pack<br></strong>+25 € al mese</label></div>
          <div class="plus-wrapper domotica w-checkbox"><input type="checkbox" id="domotica" name="domotica" data-name="domotica" value="7" class="check-plus w-checkbox-input"><label for="domotica" class="checkout-text w-form-label"><strong>Sicurezza Domotica<br>‍</strong>+7 € al mese</label></div>
          <div class="plus-wrapper security w-checkbox"><input type="checkbox" id="security-plus" name="security-plus" data-name="security-plus" value="9" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Security Plus<br>‍</strong>+9 € al mese</label></div>
          <div class="plus-wrapper emotion w-checkbox"><input type="checkbox" id="emotion" name="emotion" data-name="emotion" value="15" class="check-plus w-checkbox-input"><label for="emotion" class="checkout-text w-form-label"><strong>Emotion<br>‍‍</strong>+15 € al mese</label></div>
          <div class="plus-wrapper box-auto w-checkbox"><input type="checkbox" id="box-auto" name="box-auto" data-name="box-auto" value="123" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Box Auto<br>‍‍</strong>+123 € al mese</label></div>
          <div class="plus-wrapper assicurazione w-checkbox"><input type="checkbox" id="assicurazione" name="assicurazione" data-name="assicurazione" value="4" class="check-plus w-checkbox-input"><label for="assicurazione" class="checkout-text w-form-label"><strong>Assicurazione<br>‍</strong>+4 € al mese</label></div>
          <div class="plus-wrapper wellness w-checkbox"><input type="checkbox" id="wellness" name="wellness" data-name="wellness" value="45" class="check-plus w-checkbox-input"><label for="wellness" class="checkout-text w-form-label"><strong>Wellness<br>‍‍</strong>+45 € al mese</label></div>
          <div class="plus-wrapper outdoor w-checkbox"><input type="checkbox" id="outdoor" name="outdoor" data-name="outdoor" value="36" class="check-plus w-checkbox-input"><label for="outdoor" class="checkout-text w-form-label"><strong>Outdoor Pack<br>‍</strong>+36 € al mese</label></div>
</form>

<h2 id="display">

</h2>

Answer 3

您的输入没有以plus开头的ID，因此您的选择器在这里有问题。您可以使用form#plus div[class^=plus-] input作为选择器。这限制了选择器的范围并避免了冲突。

在您的JavaScript的第一行中，似乎还发生了一些事情：

var currentPrice = basicPrice; // every time
 CurrentPrice = basicPrice,
   plus = [],
   total = 0;

您可能没有必要设置currentPrice和CurrentPrice（两个不同的变量）-以及声明前缺少的var关键字。

希望这会有所帮助，而不会为您编写代码带来乐趣！：）

Answer 4

我将在复选框上添加一个事件侦听器。因此，每次更改时，您都可以重新计算所需的内容。此外，我还更改了foreach的选择器，因为您没有以加号开头的ID ...希望对您有所帮助。

var basicPrice = 784 ; // This is how we start
$(document).on('change','input[type=checkbox]', getCheck);
function getCheck() {
var currentPrice = basicPrice; // every time
 CurrentPrice = basicPrice,
   plus = [],
   total = 0;
   console.log(currentPrice)
  $("input[type=checkbox]").each(function(i, el) {
   
    if ($(el).is(":checked")) {
     
      total += parseInt($(el).val());
      console.log(total);
      // UPDATE:
      plus.push($(el).data('name')); // get the label text
    }
  });

 $("#plus-display").html(plus.join(", "));
 $('#rata-display-2').html(total);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span id="rata-display-1" class="span text-sottotitolo_dimensione _2 rata checkout">784 €</span>

<br> <br><br>

<div id="plus-display" class="text_piccolo black checkout">PLUS:<strong>place in which display the name of the checkboxes</strong></div>

<br><br><br>

<span id="rata-display-2" class="prezzo-checkout">784 €</span>

<br><br><br>

<form id="plus" name="plus" data-name="plus" class="form-5">
          <div class="plus-wrapper interior-pack w-checkbox"><input type="checkbox" id="interior-pack" name="interior-pack" data-name="interior-pack" value="25" class="check-plus w-checkbox-input"><label for="interior-pack" class="checkout-text w-form-label"><strong>Interior Pack<br></strong>+25 € al mese</label></div>
          <div class="plus-wrapper domotica w-checkbox"><input type="checkbox" id="domotica" name="domotica" data-name="domotica" value="7" class="check-plus w-checkbox-input"><label for="domotica" class="checkout-text w-form-label"><strong>Sicurezza Domotica<br>‍</strong>+7 € al mese</label></div>
          <div class="plus-wrapper security w-checkbox"><input type="checkbox" id="security-plus" name="security-plus" data-name="security-plus" value="9" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Security Plus<br>‍</strong>+9 € al mese</label></div>
          <div class="plus-wrapper emotion w-checkbox"><input type="checkbox" id="emotion" name="emotion" data-name="emotion" value="15" class="check-plus w-checkbox-input"><label for="emotion" class="checkout-text w-form-label"><strong>Emotion<br>‍‍</strong>+15 € al mese</label></div>
          <div class="plus-wrapper box-auto w-checkbox"><input type="checkbox" id="box-auto" name="box-auto" data-name="box-auto" value="123" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Box Auto<br>‍‍</strong>+123 € al mese</label></div>
          <div class="plus-wrapper assicurazione w-checkbox"><input type="checkbox" id="assicurazione" name="assicurazione" data-name="assicurazione" value="4" class="check-plus w-checkbox-input"><label for="assicurazione" class="checkout-text w-form-label"><strong>Assicurazione<br>‍</strong>+4 € al mese</label></div>
          <div class="plus-wrapper wellness w-checkbox"><input type="checkbox" id="wellness" name="wellness" data-name="wellness" value="45" class="check-plus w-checkbox-input"><label for="wellness" class="checkout-text w-form-label"><strong>Wellness<br>‍‍</strong>+45 € al mese</label></div>
          <div class="plus-wrapper outdoor w-checkbox"><input type="checkbox" id="outdoor" name="outdoor" data-name="outdoor" value="36" class="check-plus w-checkbox-input"><label for="outdoor" class="checkout-text w-form-label"><strong>Outdoor Pack<br>‍</strong>+36 € al mese</label></div>
</form>

Answer 5

这可以使用JQuery来实现，但实际上我修改了span标签以将其与货币分开，以便该值是动态的（但是我仅使用一个结帐值对其进行了测试）。 ..
请确保使用parseInt()来检索span标记中的文本，以使其成为 number 。
建议您参考{ {3}}对这个想法有一个更好的概念。

$(".check-plus").on("change",function(){
var basic = 784;
$(".check-plus").each(function(){
  	if(this.checked){
basic += parseInt(this.getAttribute("value"))
name += this.getAttribute("name")+"<br>"
}
})
$(".checkout.rata").text(basic);
$("#plus-display").html(name)
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span id="rata-display-1" class="span text-sottotitolo_dimensione _2 rata checkout">784</span><span class='currency'> €</span>

<br> <br><br>

<div id="plus-display" class="text_piccolo black checkout">PLUS:<strong>place in which display the name of the checkboxes</strong></div>

<br><br><br>

<span id="rata-display-2" class="prezzo-checkout">784 €</span>

<br><br><br>

<form id="plus" name="plus" data-name="plus" class="form-5">
          <div class="plus-wrapper interior-pack w-checkbox"><input type="checkbox" id="interior-pack" name="interior-pack" data-name="interior-pack" value="25" class="check-plus w-checkbox-input"><label for="interior-pack" class="checkout-text w-form-label"><strong>Interior Pack<br></strong>+25 € al mese</label></div>
          <div class="plus-wrapper domotica w-checkbox"><input type="checkbox" id="domotica" name="domotica" data-name="domotica" value="7" class="check-plus w-checkbox-input"><label for="domotica" class="checkout-text w-form-label"><strong>Sicurezza Domotica<br>‍</strong>+7 € al mese</label></div>
          <div class="plus-wrapper security w-checkbox"><input type="checkbox" id="security-plus" name="security-plus" data-name="security-plus" value="9" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Security Plus<br>‍</strong>+9 € al mese</label></div>
          <div class="plus-wrapper emotion w-checkbox"><input type="checkbox" id="emotion" name="emotion" data-name="emotion" value="15" class="check-plus w-checkbox-input"><label for="emotion" class="checkout-text w-form-label"><strong>Emotion<br>‍‍</strong>+15 € al mese</label></div>
          <div class="plus-wrapper box-auto w-checkbox"><input type="checkbox" id="box-auto" name="box-auto" data-name="box-auto" value="123" class="check-plus w-checkbox-input"><label for="checkbox-3" class="checkout-text w-form-label"><strong>Box Auto<br>‍‍</strong>+123 € al mese</label></div>
          <div class="plus-wrapper assicurazione w-checkbox"><input type="checkbox" id="assicurazione" name="assicurazione" data-name="assicurazione" value="4" class="check-plus w-checkbox-input"><label for="assicurazione" class="checkout-text w-form-label"><strong>Assicurazione<br>‍</strong>+4 € al mese</label></div>
          <div class="plus-wrapper wellness w-checkbox"><input type="checkbox" id="wellness" name="wellness" data-name="wellness" value="45" class="check-plus w-checkbox-input"><label for="wellness" class="checkout-text w-form-label"><strong>Wellness<br>‍‍</strong>+45 € al mese</label></div>
          <div class="plus-wrapper outdoor w-checkbox"><input type="checkbox" id="outdoor" name="outdoor" data-name="outdoor" value="36" class="check-plus w-checkbox-input"><label for="outdoor" class="checkout-text w-form-label"><strong>Outdoor Pack<br>‍</strong>+36 € al mese</label></div>
</form>

同时显示和汇总来自不同div的所选复选框的值

5 个答案:

通常，我会建议使用其他方法：