html - 表格中多个 <tbody> 标签的可访问性

标签 html accessibility nvda

我有多个 <tbody>我的部分 <table>它正在读取每个 <th>表包含的标签。它们具有分配给各种 th 和 td 标签的唯一 id 和 header 属性，因此，对我来说，NVDA 屏幕阅读器输出以下输出的原因没有意义:

[row# tbody 1, column header 1 name]
[<th> tbody 2, column header 1 name]
[<th> tbody 3, column header 1 name]
Current tbody 4, column header 1 name
[output of column1 data]
[output of column2 data]
[output of column3 data]
[output of column4 data]

HTML 的结构如下，here is the Pen also showing this issue 

caption{
  text-align:left;
  display: table-caption;
  clip: rect(1px, 1px, 1px, 1px);
  height:1px;
  overflow:hidden;
  position: absolute;
  top: auto;
  width: 1px;
}
.left{
  text-align:left;
}
.right{
  text-align:right;
}
.hierarchy1{
  font-size:1.25em;
  font-weight:bold;
}
.hierarchy2{
  backgound-color:#ededed;
  padding: 9px 10px 7px 8px;
  border-top: 1px solid #ccc;
  font-weight: bold;
}
.hierarchy3{
}
tr{
  height:45px;
  display:table-row;
}
table
{
  width: 100%;
  border-collapse: collapse;
}
<table>
  <caption class="offScreen">Balance Sheet Table</caption>
  <tbody>
  <tr class="hierarchy0 bold">
    <th class="left" scope="col" id="date-cell-0-1">Assets (Millions)</th>
    <th class="right greyBL" scope="col" id="date-cell-1-1">9/30/2012</th>
    <th class="right greyBL" scope="col" id="date-cell-2-1">9/30/2013</th>
    <th class="right greyBL" scope="col" id="date-cell-3-1">9/30/2014</th>
    <th class="right greyBL" scope="col" id="date-cell-4-1">9/30/2015</th>
  </tr>
  <tr class="hierarchy5">
    <td class="left" headers="date-cell-0-1">Cash</td>
    <td class="right" headers="date-cell-1-1">--</td>
    <td class="right" headers="date-cell-2-1">--</td>
    <td class="right" headers="date-cell-3-1">10,232.00</td>
    <td class="right" headers="date-cell-4-1">--</td>
  </tr>
  <tr class="hierarchy4">
    <td class="left" headers="date-cell-0-1">Cash Equivalents</td>
    <td class="right" headers="date-cell-1-1">10,746.00</td>
    <td class="right" headers="date-cell-2-1">14,259.00</td>
    <td class="right" headers="date-cell-3-1">13,844.00</td>
    <td class="right" headers="date-cell-4-1">21,120.00</td>
  </tr>
  </tbody>
 <tbody>
  <tr class="hierarchy0 bold">
    <th class="left" scope="col" id="date-cell-0-2">Liability And Shareholder Equity (Millions)</th>
    <th class="right greyBL" scope="col" id="date-cell-1-2">9/30/2012</th>
    <th class="right greyBL" scope="col" id="date-cell-2-2">9/30/2013</th>
    <th class="right greyBL" scope="col" id="date-cell-3-2">9/30/2014</th>
    <th class="right greyBL" scope="col" id="date-cell-4-2">9/30/2015</th>
  </tr>
  <tr class="hierarchy5">
    <td class="left" headers="date-cell-0-2">Accounts Payable</td>
    <td class="right" headers="date-cell-1-2">21,175.00</td>
    <td class="right" headers="date-cell-2-2">22,367.00</td>
    <td class="right" headers="date-cell-3-2">30,196.00</td>
    <td class="right" headers="date-cell-4-2">35,490.00</td>
  </tr>
  <tr class="hierarchy4">
    <td class="left" headers="date-cell-0-2">Income Tax Payable</td>
    <td class="right" headers="date-cell-1-2">--</td>
    <td class="right" headers="date-cell-2-2">--</td>
    <td class="right" headers="date-cell-3-2">--</td>
    <td class="right" headers="date-cell-4-2">--</td>
  </tr>
  </tbody>
  <tbody>
  <tr class="hierarchy0 bold">
    <th class="left" scope="col" id="date-cell-0-3">Supplemental (Millions)</th>
    <th class="right greyBL" scope="col" id="date-cell-1-3">9/30/2012</th>
    <th class="right greyBL" scope="col" id="date-cell-2-3">9/30/2013</th>
    <th class="right greyBL" scope="col" id="date-cell-3-3">9/30/2014</th>
    <th class="right greyBL" scope="col" id="date-cell-4-3">9/30/2015</th>
  </tr>
  <tr class="hierarchy1">
    <td class="right" headers="date-cell-0-3">Total Capitalization</td>
    <td class="right" headers="date-cell-1-3">111,210.00</td>
    <td class="right" headers="date-cell-2-3">140,509.00</td>
    <td class="right" headers="date-cell-3-3">140,534.00</td>
    <td class="right" headers="date-cell-4-3">172,818.00</td>
  </tr>
  <tr class="hierarchy1">
    <td class="left" headers="date-cell-0-3">Capital Lease Obligations</td>
    <td class="right" headers="date-cell-1-3">--</td>
    <td class="right" headers="date-cell-2-3">--</td>
    <td class="right" headers="date-cell-3-3">--</td>
    <td class="right" headers="date-cell-4-3">--</td>
  </tr>
  <tr class="hierarchy1">
    <td class="left" headers="date-cell-0-3">Preferred Stock Equity</td>
    <td class="right" headers="date-cell-1-3">--</td>
    <td class="right" headers="date-cell-2-3">--</td>
    <td class="right" headers="date-cell-3-3">--</td>
    <td class="right" headers="date-cell-4-3">--</td>
  </tr>
  </tbody>

如果您对这种 HTML 结构和可访问性有任何了解，我们将不胜感激。

最佳答案

通过评论，我发现这个问题与带有 NVDA 的 Chrome 有关。带有 NVDA 的 Firefox 按预期工作。

为了使用 NVDA 跨浏览器工作，我构建了多个表，每个表一个，并删除了 headers 和 id 属性，因为这样做在语义上更有意义。这是一个 example of it working cross browser (Chrome, Firefox) 与 NVDA 

<table>
  <caption class="offScreen">Balance Sheet Table</caption>
  <tbody>
  <tr class="hierarchy0 bold">
    <th class="left" scope="col">Assets (Millions)</th>
    <th class="right greyBL" scope="col">9/30/2012</th>
    <th class="right greyBL" scope="col">9/30/2013</th>
    <th class="right greyBL" scope="col">9/30/2014</th>
    <th class="right greyBL" scope="col">9/30/2015</th>
  </tr>
  <tr class="hierarchy5">
    <td class="left">Cash</td>
    <td class="right">--</td>
    <td class="right">--</td>
    <td class="right">10,232.00</td>
    <td class="right">--</td>
  </tr>
  <tr class="hierarchy4">
    <td class="left">Cash Equivalents</td>
    <td class="right">10,746.00</td>
    <td class="right">14,259.00</td>
    <td class="right">13,844.00</td>
    <td class="right">21,120.00</td>
  </tr>
  </tbody>
</table>
<table>
 <tbody>
  <tr class="hierarchy0 bold">
    <th class="left" scope="col">Liability And Shareholder Equity (Millions)</th>
    <th class="right greyBL" scope="col">9/30/2012</th>
    <th class="right greyBL" scope="col">9/30/2013</th>
    <th class="right greyBL" scope="col">9/30/2014</th>
    <th class="right greyBL" scope="col">9/30/2015</th>
  </tr>
  <tr class="hierarchy5">
    <td class="left">Accounts Payable</td>
    <td class="right">21,175.00</td>
    <td class="right">22,367.00</td>
    <td class="right">30,196.00</td>
    <td class="right">35,490.00</td>
  </tr>
  <tr class="hierarchy4">
    <td class="left">Income Tax Payable</td>
    <td class="right">--</td>
    <td class="right">--</td>
    <td class="right">--</td>
    <td class="right">--</td>
  </tr>
  </tbody>
 </table>
 <table>
  <tbody>
  <tr class="hierarchy0 bold">
    <th class="left" scope="col">Supplemental (Millions)</th>
    <th class="right greyBL" scope="col">9/30/2012</th>
    <th class="right greyBL" scope="col">9/30/2013</th>
    <th class="right greyBL" scope="col">9/30/2014</th>
    <th class="right greyBL" scope="col">9/30/2015</th>
  </tr>
  <tr class="hierarchy1">
    <td class="right">Total Capitalization</td>
    <td class="right">111,210.00</td>
    <td class="right">140,509.00</td>
    <td class="right">140,534.00</td>
    <td class="right">172,818.00</td>
  </tr>
  <tr class="hierarchy1">
    <td class="left">Capital Lease Obligations</td>
    <td class="right">--</td>
    <td class="right">--</td>
    <td class="right">--</td>
    <td class="right">--</td>
  </tr>
  <tr class="hierarchy1">
    <td class="left">Preferred Stock Equity</td>
    <td class="right">--</td>
    <td class="right">--</td>
    <td class="right">--</td>
    <td class="right">--</td>
  </tr>
  </tbody>

关于html - 表格中多个 <tbody> 标签的可访问性，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37418718/

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