我正在尝试减去父标题行的值（它们是各自子行的总和），但它只是在显示减号时继续添加。我该如何减去？
HTML：
<table class="table">
<tr class="parent-A">
<td>
<h5>A</h5>
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
</tr>
<tr>
<td>
<h6>A1</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
</tr>
<tr>
<td>
<h6>A2</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
</tr>
<tr>
<td>
<h6>A3</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
<td> </td>
<td>
<input type="text" data-parent="A" />
</td>
</tr>
<tr class="parent-B">
<td>
<h5>B</h5>
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
</tr>
<tr>
<td>
<h6>B1</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
</tr>
<tr>
<td>
<h6>B2</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
</tr>
<tr>
<td>
<h6>B3</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
<td> </td>
<td>
<input type="text" data-parent="B" />
</td>
</tr>
<tr class="total" data-par="A,B">
<td colspan="2">
<h4>Total A - B</h4>
</td>
<td colspan="2">
<input type="text" />
</td>
<td colspan="2">
<input type="text" />
</td>
<td>
<input type="text" />
</td>
</tr>
<tr class="parent-C">
<td>
<h5>C</h5>
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
</tr>
<tr>
<td>
<h6>C1</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
</tr>
<tr>
<td>
<h6>C2</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
</tr>
<tr>
<td>
<h6>C3</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
<td> </td>
<td>
<input type="text" data-parent="C" />
</td>
</tr>
<tr class="parent-D">
<td>
<h5>D</h5>
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
<td> </td>
<td>
<input type="text" />
</td>
</tr>
<tr>
<td>
<h6>D1</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
</tr>
<tr>
<td>
<h6>D2</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
</tr>
<tr>
<td>
<h6>D3</h6>
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
<td> </td>
<td>
<input type="text" data-parent="D" />
</td>
</tr>
<tr class="total" data-par="C,D">
<td colspan="2">
<h4>Total C - D</h4>
</td>
<td colspan="2">
<input type="text" />
</td>
<td colspan="2">
<input type="text" />
</td>
<td>
<input type="text" />
</td>
</tr>
</table>
jQuery的：
$(function () {
$('[class*="parent-"] input').attr('readonly', true);
var total_par = $('tr.total');
$('input[type=text]').on('blur', function () {
var totals = [0, 0, 0],
parent_name = $(this).data('parent'),
find_parent_row = $('tr.parent-' + parent_name);
find_parent_row.nextUntil('[class*="parent-"]').find('input').each(function () {
totals[$(this).parent('td').index() / 2 - 1] += +this.value;
});
find_parent_row.find('input').each(function (i) {
this.value = totals[i];
});
total_par.each(function () {
totals = [0, 0, 0];
var par = $(this).data('par').split(',');
$('[data-parent="' + par[0] + '"]').add('[data-parent="' + par[1] + '"]').each(function () {
totals[$(this).parent('td').index() / 2 - 1] -= this.value; //subtract doesn't seem to be working!
});
$(this).find('input').val(function (i) {
return totals[i];
});
});
});
});
答案 0 :(得分：1)
<强> HTML
<tr class="total" data-par="A,B"> <!-- for A-B -->
<tr class="total" data-par="C,D"> <!-- for C-D -->
<强> JS
total_par.each(function () {
totals = [0, 0, 0];
var par = $(this).data('par').split(','); // par[0] = A and par[1] = B
$('[data-parent="' + par[0] + '"]').each(function () { //for A
totals[$(this).parent('td').index() / 2 - 1] += +this.value; // add all values
});
$('[data-parent="' + par[1] + '"]').each(function () {//for B
totals[$(this).parent('td').index() / 2 - 1] += -1 * +this.value;// subtract all values --> number is multiplied with -1 to make it negative and than added
});
$(this).find('input').val(function (i) {
return totals[i]; //assign values to current input element inside class total
});
});
<小时/> 或
total_par.each(function () {
totals = [0, 0, 0];
var par = $(this).data('par').split(',');
$('[data-parent="' + par[0] + '"]').each(function () {
totals[$(this).parent('td').index() / 2 - 1] += +this.value;
});
$('[data-parent="' + par[1] + '"]').each(function () {
totals[$(this).parent('td').index() / 2 - 1] -= +this.value;// subtract all values
});
$(this).find('input').val(function (i) {
return totals[i];
});
});
<小时/> fiddle Demo
find_parent_row.nextUntil('[class*="parent-"]').find('input[data-parent="' + parent_name + '"]').each(function () {
totals[$(this).parent('td').index() / 2 - 1] += +this.value;
});
添加.find('input[data-parent="' + parent_name + '"]')