将内容拉入 td data-label 属性

Question

我正在使用响应式表格样式，它会在较小的屏幕尺寸下折叠并在每个单元格之前显示表格标题。

body {
  font-family: "Open Sans", sans-serif;
  line-height: 1.25;
}
table {
  border: 1px solid #ccc;
  border-collapse: collapse;
  margin: 0;
  padding: 0;
  width: 100%;
  table-layout: fixed;
}
table caption {
  font-size: 1.5em;
  margin: .5em 0 .75em;
}
table tr {
  background: #f8f8f8;
  border: 1px solid #ddd;
  padding: .35em;
}
table th,
table td {
  padding: .625em;
  text-align: center;
}
table th {
  font-size: .85em;
  letter-spacing: .1em;
  text-transform: uppercase;
}
@media screen and (max-width: 600px) {
  table {
    border: 0;
  }
  table caption {
    font-size: 1.3em;
  }
  table thead {
    border: none;
    clip: rect(0 0 0 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    color: red;
    background-color:#000;
  }
  table tr {
    border-bottom: 3px solid #ddd;
    display: block;
    margin-bottom: .625em;
  }
  table td {
    border-bottom: 1px solid #ddd;
    display: block;
    font-size: .8em;
    text-align: right;
  }
  table td:before {
    /*
    * aria-label has no advantage, it won't be read inside a table
    content: attr(aria-label);
    */
    content: attr(data-label);
    float: left;
    font-weight: bold;
    text-transform: uppercase;
  }
  table td:last-child {
    border-bottom: 0;
  }
  table td:first-child{
    color:white;
    background: #000;
  }
}

<table>
  <caption>Statement Summary</caption>
  <thead>
    <tr>
      <th scope="col">Account</th>
      <th scope="col">Estimated arrival date</th>
      <th scope="col">Amount</th>
      <th scope="col">Period</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td data-label="Account">Visa - 3412</td>
      <td data-label="Really freaking long div magic">04/01/2016</td>
      <td data-label="Amount">$1,190</td>
      <td data-label="Period">03/01/2016 - 03/31/2016</td>
    </tr>
    <tr>
      <td scope="row" data-label="Account">Visa - 6076</td>
      <td data-label="Due Date">03/01/2016</td>
      <td data-label="Amount">$2,443</td>
      <td data-label="Period">02/01/2016 - 02/29/2016</td>
    </tr>
    <tr>
      <td scope="row" data-label="Account">Corporate AMEX</td>
      <td data-label="Due Date">03/01/2016</td>
      <td data-label="Amount">$1,181</td>
      <td data-label="Period">02/01/2016 - 02/29/2016</td>
    </tr>
</tbody>
</table>

使用每个相应表格单元格上的 data-label 属性来表示列标题。在 CSS 中，它被称为内容：attr(data-label)。我将这种样式应用于一些相当大的表格，我不想为 HTML 中的每个单元格编写数据标签。有没有办法使用 Javascript 将 th 拉入 data-label 属性？

Answer 1

你想让表格从这个开始吗：

| Account | Estimated arrival date | Amount | Period |
| ------- | ---------------------- | ------ | ------ |
|    1234 |             03/15/2001 |  $1.00 |    3rd |
|    1235 |             04/21/2002 | $12.00 |    4th |
|    4594 |             11/11/2011 | $45.00 |    2nd |

这个？：

-----------
Account: 1234
Estimated Arrival Date: 03/15/2001
Amount: $1.00
Period: 3rd
-----------
Account: 1235
Estimated Arrival Date: 04/21/2002
Amount: $12.00
Period: 4th
-----------
Account: 4594
Estimated Arrival Date: 11/11/2011
Amount: $45.00
Period: 2nd
-----------

更新 试试这个代码：

function toggle() {
  var table = document.querySelector('.my-table');
  table.classList.toggle('show-thin');
}

.table {
  border-collapse: collapse;
  display: inline-table;
}

.tr {
  display: table-row;
}

.th, .td {
  display: table-cell;
  border: 1px solid #555;
  padding: 3px 6px;
}

.th {
  background-color: #ddd;
  font-weight: bold;
  text-align: center;
}

.td {
  text-align: right;
}

.my-table.show-thin {
  display: block;
}

.show-thin .tr {
  border-bottom: 1px solid black;
  display: block;
  margin-bottom: 2px;
  padding-bottom: 2px;
}

.show-thin .td {
  border: none;
  display: block;
  padding: 0;
  text-align: left;
}

.show-thin .td:before {
  content: attr(title) ':';
  display: inline-block;
  font-weight: bold;
  padding-right: 5px;
}

.show-thin .thin-hide {
  display: none;
}

<button onclick="toggle()">Toggle</button>
<hr/>
<div class="my-table">
<div class="tr thin-hide">
  <span class="th">Account</span>
  <span class="th">Estimated arrival date</span>
  <span class="th">Amount</span>
  <span class="th">Period</span>
</div>
<div class="tr">
  <span class="td" title="Account">1234</span>
  <span class="td" title="Estimated Arrival Date">03/15/2001</span>
  <span class="td" title="Amount">$1.00</span>
  <span class="td" title="Period">3rd</span>
</div>
<div class="tr">
  <span class="td" title="Account">1235</span>
  <span class="td" title="Estimated Arrival Date">04/21/2002</span>
  <span class="td" title="Amount">$12.00</span>
  <span class="td" title="Period">4th</span>
</div>
<div class="tr">
  <span class="td" title="Account">4594</span>
  <span class="td" title="Estimated Arrival Date">11/11/2011</span>
  <span class="td" title="Amount">$45.50</span>
  <span class="td" title="Period">2nd</span>
</div>
</div>

我的示例使用一个类将值从表格格式更改为行格式。但它也可以使用媒体查询来完成。这只是更容易演示。

诀窍是在每个单元格上放置title 属性。然后在精简模式下使用 CSS 显示title。

---

这显示了表格在宽模式下的样子

---

这显示了瘦模式下的情况

---

当您查看这两个图像时，您会看到标准表格格式使用术语“预计到达日期”，第一个工作大写。精简版使用“Estimated Arrival Date”，所有单词都大写。这是为了表明价值来自不同的地方。

在宽模式下，标题来自这里：

<div class="tr thin-hide">
  <span class="th">Account</span>
  <span class="th">Estimated arrival date</span>
  <span class="th">Amount</span>
  <span class="th">Period</span>
</div>

在瘦模式下，它来自title 属性。

如果您尝试使用<table>、<tr>、<th> 和<td> 标签，这将不起作用。

Answer 2

我的 jQuery 解决方案似乎有效（可选：我跳过任何带有 colspans 的表格单元格）：

    $('.myDiv table').each(function (index, value) {
    var headerCount = $(this).find('thead th').length;

    for (i = 0; i <= headerCount; i++) {
        var headerLabel = $(this).find('thead th:nth-child(' + i + ')').text();

        $(this).find('tr td:not([colspan]):nth-child(' + i + ')').replaceWith(
            function () {
                return $('<td data-label="' + headerLabel + '">').append($(this).contents());
            }
        );
    }

});

Answer 3

这个小代码 jQuery 复制 attr "data-label" TH 到 TD

$('table th').each(function(i,elem) {
  var num = i + 1;
  $('table td:nth-child(' + num + ')').attr('data-label', $(elem).text());
});