2 回答

TA貢獻(xiàn)1801條經(jīng)驗(yàn) 獲得超16個(gè)贊
這是一個(gè)基本示例。
$(function() {
function getPrice(row) {
var txt = $(".price", row).text().slice(1);
var p = parseFloat(txt);
return p;
}
function calcSum(t) {
var result = 0.00;
$("tbody tr", t).each(function(i, r) {
if ($("input", r).is(":checked")) {
result += getPrice(r);
}
});
return result;
}
function updateSum(tbl) {
var t = calcSum(tbl);
$("tfoot .total.price", tbl).html("$" + t.toFixed(2));
}
updateSum($("#price-list"));
$("#price-list input").change(function() {
updateSum($("#price-list"));
});
});
#price-list {
width: 240px;
}
#price-list thead th {
width: 33%;
border-bottom: 1px solid #ccc;
}
#price-list tfoot td {
border-top: 1px solid #ccc;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table id="price-list">
<thead>
<tr>
<th>Name</th>
<th>Price</th>
<th> </th>
</tr>
</thead>
<tbody>
<tr>
<td class="item name">Item 1</td>
<td class="item price">$3.00</td>
<td><input type="checkbox" checked /></td>
</tr>
<tr>
<td class="item name">Item 2</td>
<td class="item price">$4.00</td>
<td><input type="checkbox" checked /></td>
</tr>
<tr>
<td class="item name">Item 3</td>
<td class="item price">$5.00</td>
<td><input type="checkbox" checked /></td>
</tr>
</tbody>
<tfoot>
<tr>
<td>Sum</td>
<td class="total price">$0.00</td>
<td> </td>
</tr>
</tfoot>
</table>

TA貢獻(xiàn)1943條經(jīng)驗(yàn) 獲得超7個(gè)贊
這一切都?xì)w結(jié)為為復(fù)選框設(shè)置事件處理程序。事件處理程序應(yīng)執(zhí)行以下操作:
跟蹤
checkbox change
所有復(fù)選框的事件和DOM ready
事件計(jì)算選中復(fù)選框的所有行的總和
將總計(jì)設(shè)置為總計(jì)元素
它還調(diào)用對未選中的行執(zhí)行任何所需的更改..在下面的示例代碼中未完成
代碼
$(function() {
$('.select').on('change', function() {
let total = $('.select:checked').map(function() {
return +$(this).parent().prev().text();
})
.get()
.reduce(function(sum, price) {
return sum + price;
});
$('#total').text( total );
})
.change();//trigger the change event on DOM ready
});
片段
$(function() {
$('.select').on('change', function() {
let total = $('.select:checked').map(function() {
return +$(this).parent().prev().text();
})
.get()
.reduce(function(sum, price) {
return sum + price;
});
$('#total').text( total );
})
.change();
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
<thead>
<tr>
<th>Item</th>
<th>Price</th>
<th>Select</th>
</tr>
</thead>
<tbody>
<tr>
<td>Item 1</td>
<td>1000</td>
<td><input type="checkbox" class="select" checked></td>
</tr>
<tr>
<td>Item 2</td>
<td>1200</td>
<td><input type="checkbox" class="select" checked></td>
</tr>
<tr>
<td>Item 3</td>
<td>800</td>
<td><input type="checkbox" class="select" checked></td>
</tr>
<tr>
<td>Item 4</td>
<td>102000</td>
<td><input type="checkbox" class="select" checked></td>
</tr>
</tbody>
</table>
<span>TOTAL</span><span id="total"></span>
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