javascript - 选中/取消选中所有复选框并添加值

Question

我需要为每套图书设置一个选中/取消选中全部复选框。它还应该加上总价和重量。到目前为止，我只能选中每个框，它会很好地添加值，但是一旦我添加一个函数来选中所有框，一切都会停止工作。

//check all function (commented it because it does not work)

//$("#checkAll").change(function () {
//$("input:checkbox").prop('checked', $(this).prop("checked"));
//});


// add weight and price
var inputs = document.getElementsByClassName('sum'),
    totalElement = document.getElementById('payment-total'),
    weightElement = document.getElementById('payment-weight'),
    totalPrice = 0,
    totalWeight = 0;


for (var i = 0; i < inputs.length; i++) {
  inputs[i].onchange = function() {
    if (this.checked) {
      totalPrice += parseFloat(this.value);
      totalWeight += parseFloat(this.getAttribute('Bweight'));
    } else {
      totalPrice -= parseFloat(this.value);
      totalWeight -= parseFloat(this.getAttribute('Bweight'));
    }

    totalElement.innerHTML = totalPrice.toFixed(2);
    weightElement.innerHTML = totalWeight.toFixed(2);
  }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p><label><input type="checkbox" id="checkAll"/> Check all Set A</label></p>
<fieldset>
  <legend>Set A Books</legend> 
  <input value="300" type="checkbox" bweight=".500" id="ENG101" class="sum" data-toggle="checkbox"> English
  <input value="500" type="checkbox" bweight=".330" id="SCI101" class="sum" data-toggle="checkbox"> Science
  <input value="755" type="checkbox" bweight=".633" id="CLE101" class="sum" data-toggle="checkbox"> Christian Living
</fieldset>

<p><label><input type="checkbox" id="checkAll"/> Check all Set B</label></p>
<fieldset>
  <legend>Set B Books</legend> 
  <input value="245" type="checkbox" bweight=".845" id="ENG202" class="sum" data-toggle="checkbox"> English
  <input value="534" type="checkbox" bweight=".734" id="SCI202" class="sum" data-toggle="checkbox"> Science
  <input value="623" type="checkbox" bweight=".257" id="CLE202" class="sum" data-toggle="checkbox"> Christian Living
  <input value="954" type="checkbox" bweight=".845" id="MAT101" class="sum" data-toggle="checkbox"> Math
</fieldset>
<p></p>
<div class="card-charge-info">
  Weight <span id="payment-weight">0</span>
</div>
<div class="card-charge-info">
  Price <span id="payment-total">0</span>
</div>

我需要让它以某种方式工作，当选择全部选中时，它还应该添加总价格和重量，无论是否选中单个框。我真的很感谢你的帮助，因为我已经被这个问题困扰好几天了。谢谢!

Answer 1

HTML 代码

<p>
                    <label><input onclick="CheckAll('group1', this);" type="checkbox" id="checkAll" /> Check all Set A</label>
                </p>
                <fieldset id="group1">
                    <legend>Set A Books</legend>
                    <input value="300" type="checkbox" bweight=".500" id="ENG101" class="sum" data-toggle="checkbox"> English
                    <input value="500" type="checkbox" bweight=".330" id="SCI101" class="sum" data-toggle="checkbox"> Science
                    <input value="755" type="checkbox" bweight=".633" id="CLE101" class="sum" data-toggle="checkbox"> Christian Living
                </fieldset>

                <p><label><input onclick="CheckAll('group2', this);" type="checkbox" id="checkAll" /> Check all Set B</label></p>
                <fieldset id="group2">
                    <legend>Set B Books</legend>
                    <input value="245" type="checkbox" bweight=".845" id="ENG202" class="sum" data-toggle="checkbox"> English
                    <input value="534" type="checkbox" bweight=".734" id="SCI202" class="sum" data-toggle="checkbox"> Science
                    <input value="623" type="checkbox" bweight=".257" id="CLE202" class="sum" data-toggle="checkbox"> Christian Living
                    <input value="954" type="checkbox" bweight=".845" id="MAT101" class="sum" data-toggle="checkbox"> Math
                </fieldset>
                <p></p>
                <div class="card-charge-info">
                    Weight <span id="payment-weight">0</span>
                </div>
                <div class="card-charge-info">
                    Price <span id="payment-total">0</span>
                </div>

Java 脚本代码

var inputs = document.getElementsByClassName('sum'),
totalElement = document.getElementById('payment-total'),
weightElement = document.getElementById('payment-weight'),
totalPrice = 0,
totalWeight = 0;


for (var i = 0; i < inputs.length; i++) {
    inputs[i].onchange = function () {
        if (this.checked) {
            totalPrice += parseFloat(this.value);
            totalWeight += parseFloat(this.getAttribute('Bweight'));
        } else {
            totalPrice -= parseFloat(this.value);
            totalWeight -= parseFloat(this.getAttribute('Bweight'));
        }

        totalElement.innerHTML = totalPrice.toFixed(2);
        weightElement.innerHTML = totalWeight.toFixed(2);
    }
}

function CheckAll(divId, sourceCheckbox) {
    divElement = document.getElementById(divId);
    inputElements = divElement.getElementsByTagName('input');
    for (i = 0; i < inputElements.length; i++) {
        if (inputElements[i].type != 'checkbox')
            continue;

        inputElements[i].checked = sourceCheckbox.checked;

        if (sourceCheckbox.checked) {
            totalPrice += parseFloat(inputElements[i].value);
            totalWeight += parseFloat(inputElements[i].getAttribute('Bweight'));
        } else {
            totalPrice -= parseFloat(inputElements[i].value);
            totalWeight -= parseFloat(inputElements[i].getAttribute('Bweight'));
        }
        totalElement.innerHTML = totalPrice.toFixed(2);
        weightElement.innerHTML = totalWeight.toFixed(2);
    }
}