点击添加按钮后，小计值会更新，并显示价格 * 数量的结果，但不起作用。
`
<body>
<section class="section dashboard">
<form action="http://127.0.0.1:4321/pembelian/add/create" method="POST">
<input type="hidden" name="_token" value="zwlU7e6su5TVTxRAWZiXnMMdMFDrVZtk5WATlXWT" autocomplete="off">
<div class="col text-end mb-4">
<button type="submit" class="btn btn-outline-primary" id="submitButton" fdprocessedid="fh7vd">Buat Pesanan</button>
</div>
<div class="row">
<div class="col-lg-4">
<div class="card">
<div class="image-container" style="width: 200px; height: 150px; background-color: white; display: flex; justify-content: center; align-items: center;">
<img src="http://127.0.0.1:4321/assets/images/storage/../eskrim.jpg" class="card-img-top" alt="storage/../eskrim.jpg" style="max-width: 100%; max-height: 100%; object-fit: contain;">
</div>
<div class="card-body text-center">
<h5 class="card-title">Es Krim</h5>
<p class="card-text">Rp 12.500</p>
<p class="card-text">13</p>
<div class="flex flex-col gap-0 items-center">
<input type="hidden" name="produkId[1]" value="1" id="produkId1">
<div class="flex flex-row gap-0 items-center justify-center w-full">
<button type="button" id="button-min1" class="border-0 focus:outline-none" fdprocessedid="g7pore">-</button>
<input class="input-quantity border-0 bg-transparent focus:outline-none focus:ring-0" type="number" name="total_produk[1]" value="0" min="0" max="100" id="quantity1" fdprocessedid="wlgdxd">
<button type="button" id="button-plus1" class="border-0 font-semibold focus:outline-none" fdprocessedid="rkul0jd">+</button>
</div>
<div class="flex flex-row w-full">
<span class="border-0">Subtotal : Rp</span>
<input id="subTotal1" value="0" type="text" class="border-0 text-sm text-start bg-transparent" disabled="" fdprocessedid="b4zjhr">
</div>
</div>
</div>
</div>
</div>
<script>
var minOp = document.getElementById('button-min1');
var plusOp = document.getElementById('button-plus1');
var quantity = document.getElementById('quantity1');
var subTotal = document.getElementById('subTotal1');
var submitButton = document.getElementById('submitButton');
minOp.addEventListener('click', function() {
var value = parseInt(quantity1.value);
if (!isNaN(value) && value > 0) {
quantity1.value = value - 1;
}
calcSubtotal1()
})
plusOp.addEventListener('click', function() {
var value = parseInt(quantity1.value);
if (!isNaN(value))
quantity1.value = value + 1;
calcSubtotal1()
console.log('value', value);
})
function calcSubtotal1() {
var price = 12500.00;
var quantity = parseInt(quantity1.value);
var subTotals = price * quantity;
subTotal1.value = number_format(subTotals, 0,',','.');
console.log('subTotal1.value', subTotal1.value);
};
function number_format (number, decimals, dec_point, thousands_sep) {
// Strip all characters but numerical ones.
number = (number + '').replace(/[^0-9+\-Ee.]/g, '');
var n = !isFinite(+number) ? 0 : +number,
prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
s = '',
toFixedFix = function (n, prec) {
var k = Math.pow(10, prec);
return '' + Math.round(n * k) / k;
};
// Fix for IE parseFloat(0.55).toFixed(0) = 0;
s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
if (s[0].length > 3) {
s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
}
if ((s[1] || '').length < prec) {
s[1] = s[1] || '';
s[1] += new Array(prec - s[1].length + 1).join('0');
}
return s.join(dec);
}
</body>
我确实把值改成1了，点击加号按钮的时候就变成0了。我还检查了console.log('value', value)和console.log('subTotal', Subtotal)，数据进来了但小计根本没有改变。 我也问过chat gpt，但结果没有显示任何进展。
有人可以帮助我吗？
程序按预期运行。 number_format 函数有问题。所以我用这个相当于PHP函数number_format的JS是什么？
感谢您的关注。