我有一个表,该表的标题如下所示:
table, th, td {
border: 1px solid black;
}
<table>
<thead>
<tr>
<th rowspan="2">Fisrt Name</th>
<th rowspan="2">Last Name</th>
<th colspan="4">Day 1</th>
<th colspan="4">Day 2</th>
</tr>
<tr>
<th session-id="101">Session 1</th>
<th session-id="102">Session 2</th>
<th session-id="103">Session 3</th>
<th session-id="104">Session 4</th>
<th session-id="105">Session 1</th>
<th session-id="106">Session 2</th>
<th session-id="107">Session 3</th>
<th session-id="108">Session 4</th>
</tr>
</thead>
<tbody>
<tr>
<td student-id="110">Foo</td>
<td>Bar</td>
<td>Present</td>
<td>Absent</td>
<td>Present</td>
<td>Present</td>
<td>Absent</td>
<td>Present</td>
<td>Present</td>
<td>Present</td>
</tr>
</tbody>
</table>
我想获取每个学生的出勤数据。我使用此jQuery代码遍历表行的所有列。问题是不考虑最后一些列。
$('#attendanceTable tbody > tr')
.each(function(i, row) {
var studentId = '';
var list = [];
$(row)
.find('td')
.each(function(j, column) {
if (j === 0) {
studentId = $(column).attr('student-id');
}
else
{
// Each session tds has a session id
var $th = $(column).closest('table').find('th').eq($(column).index());
var sessionId = $th.attr('session-id');
if (sessionId){
list.push(sessionId);
}
}
});
// do sth with list
list = [];
});
每行有10列,但是当通过$(row).find('td').each(function(j, column)
进行迭代时,它会在[First name, Last Name, Day 1, Day 2, Session1-to-session4, SESSION1-to-SESSION2]
列上进行迭代,并且这里出现了问题。
我认为下面的行引起了问题。
var $th = $(column).closest('table').find('th').eq($(column).index());
我该如何解决问题?
答案 0 :(得分:0)
rowspan
属性使计算混乱。您也没有考虑标头单元格分布在两行中的事实。您可以像这样重构代码,更重要的是,只需从.index()
中减去2即可找到匹配的标头:
var $table = $("#attendanceTable");
var $headers = $table.find("thead > tr:nth-child(2) th");
$table.find("tbody > tr").each(function() {
var studentId = $(this).find("td:nth-child(1)").attr("student-id");
var list = [];
/* td:nth-child(n+3) means third cell and onwards */
$(this).find("td:nth-child(n+3)").each(function() {
var $th = $headers.eq($(this).index() - 2);
var sessionId = $th.attr("session-id");
list.push(sessionId);
});
console.log(list);
});
table,
th,
td {
border: 1px solid black;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<table id="attendanceTable">
<thead>
<tr>
<th rowspan="2">Fisrt Name</th>
<th rowspan="2">Last Name</th>
<th colspan="4">Day 1</th>
<th colspan="4">Day 2</th>
</tr>
<tr>
<th session-id="101">Session 1</th>
<th session-id="102">Session 2</th>
<th session-id="103">Session 3</th>
<th session-id="104">Session 4</th>
<th session-id="105">Session 1</th>
<th session-id="106">Session 2</th>
<th session-id="107">Session 3</th>
<th session-id="108">Session 4</th>
</tr>
</thead>
<tbody>
<tr>
<td student-id="110">Foo</td>
<td>Bar</td>
<td>Present</td>
<td>Absent</td>
<td>Present</td>
<td>Present</td>
<td>Absent</td>
<td>Present</td>
<td>Present</td>
<td>Present</td>
</tr>
</tbody>
</table>