我有一个如下表:
<table>
<th>Sl No</th>
<th>Quantity</th>
<th>Price</th>
<th>Discount %</th>
<th>Total Price</th>
<tr>
<td>1</td>
<td><input class="expensess" ></input></td>
<td><input class="expensess" ></input></td>
<td><input class="expensess" ></input></td>
<td><input class="expensess_sum"></input></td>
</tr>
<tr>
<td>2</td>
<td><input class="expensess" ></input></td>
<td><input class="expensess" ></input></td>
<td><input class="expensess" ></input></td>
<td><input class="expensess_sum"></input></td>
</tr>
</table>
Grand Total = <input id="grand_total">
我正在尝试使用 jquery keyup 函数显示每行的总价。 并且还想显示每行的总价。 总价的计算公式如下:
discount_value = Price*(discount_percent/100)
discount_price = Price-discount_value
total_price = discount_price * quantity
我该怎么做，请帮忙
我正在尝试简单地总结所有值，如下所示:
<script type="text/javascript">
$(document).ready(function(){
$(".expensess").each(function() {
$(document).on('keyup', '.expensess', function() {
sum($(this).parents("tr"));
});
});
});
function sum(parent){
var sum = 0;
$(parent).find(".expensess").each(function(){
if(!isNaN(this.value) && this.value.length!=0) {
sum += parseFloat(this.value);
}
});
$(parent).find(".expensess_sum").val(sum.toFixed(2));
}
</script>
但是我很困惑如何实现上述公式来计算总价。
最佳答案
$('input.qty,input.price,input.discount').on('change keyup',function(){
var $tr = $(this).closest('tr'),
$qty = $tr.find('input.qty') ,
$price= $tr.find('input.price'),
$discount= $tr.find('input.discount'),
$total= $tr.find('input.expensess_sum'),
$grand_total=$('#grand_total');
$total.val($qty.val()*($price.val()-($price.val()*($discount.val()/100))));
var grandTotal=0;
$('table').find('input.expensess_sum').each(function(){
if(!isNaN($(this).val()))
{grandTotal += parseInt($(this).val());
}
});
if(isNaN(grandTotal))
grandTotal =0;
$grand_total.val(grandTotal)
})input{
width:80px;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<table>
<tbody><tr>
<th>Sl No</th>
<th>Quantity</th>
<th>Price</th>
<th>Discount %</th>
<th>Total Price</th>
</tr>
<tr>
<td>1</td>
<td><input class="expensess qty"></td>
<td><input class="expensess price"></td>
<td><input class="expensess discount"></td>
<td><input class="expensess_sum" disabled=""></td>
</tr>
<tr>
<td>2</td>
<td><input class="expensess qty"></td>
<td><input class="expensess price"></td>
<td><input class="expensess discount"></td>
<td><input class="expensess_sum" disabled=""></td>
</tr>
</tbody></table>
Grand Total = <input id="grand_total" disabled="">
</body>关于javascript - 使用jquery计算总值(value)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48474983/