崩溃扩展了HTML表

Question

我以HTML表和jQuery脚本为例，我正在尝试更改此组合的行为。当前表行已扩展并在click上崩溃。如何更改将其折叠并在click上展开。

$('.header').click(function() {
  $(this).toggleClass('expand').nextUntil('tr.header').slideToggle(100);
});

table,
tr,
td,
th {
  border: 1px solid black;
  border-collapse: collapse;
}
tr.header {
  cursor: pointer;
}
.header .sign:after {
  content: "+";
  display: inline-block;
}
.header.expand .sign:after {
  content: "-";
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<table border="0">
  <tr class="header expand">
    <th colspan="2">Header <span class="sign"></span></th>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
  <tr class="header expand">
    <th colspan="2">Header <span class="sign"></span></th>
  </tr>
  <tr>
    <td>date</td>
    <td>data</td>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
</table>

小提琴

Answer 1

要逆转默认状态，您只需要从.header元素中删除expand类，然后在标准tr元素上设置display: none。JS逻辑是相同的。

tr.header {
  cursor: pointer;
  display: table-row;
}
tr {
  display: none;
}

更新了小提琴

Answer 2

为了崩溃以扩展行为，最初隐藏行：

 $('.header').nextUntil('tr.header').hide(); 

$('.header').nextUntil('tr.header').hide();
$('.header').click(function() {
  $(this).toggleClass('expand').nextUntil('tr.header').slideToggle(100);
});

table,
tr,
td,
th {
  border: 1px solid black;
  border-collapse: collapse;
}
tr.header {
  cursor: pointer;
}
.header .sign:after {
  content: "+";
  display: inline-block;
}
.header.expand .sign:after {
  content: "-";
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<table border="0">
  <tr class="header expand">
    <th colspan="2">Header <span class="sign"></span></th>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
  <tr class="header expand">
    <th colspan="2">Header <span class="sign"></span></th>
  </tr>
  <tr>
    <td>date</td>
    <td>data</td>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
  <tr>
    <td>data</td>
    <td>data</td>
  </tr>
</table>