正确设置行表头和列表头
将每个单元格与正确的表头关联起来。
正确设置行表头和列表头 是 CoddyKit 上的免费 Web Accessibility Academy 课时。 这是第 2 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Web Accessibility Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Web Accessibility Academy 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Most Tables Have Two Header Types
Real data usually has headers along the top and down the side. Each data cell sits at the crossing of a column header and a row header.
Every Cell Needs Both
The value 92 means little alone. Tie it to Ada and to Score and it becomes Ada, Score, 92. That pairing is the association you are building.
Column Headers Across the Top
The first row holds scope=col headers. As a user arrows down a column, the screen reader keeps announcing that column header for context.
<tr>
<th scope="col">Student</th>
<th scope="col">Score</th>
</tr>Row Headers Down the Side
The first cell in each body row becomes a scope=row header. It names the row so values get a who or a when as the user reads across.
<tr>
<th scope="row">Ada</th>
<td>92</td>
</tr>The Corner Cell
The top-left cell often sits above row headers and beside column headers. Leaving it as an empty th is fine and keeps the grid honest.
<tr><th></th><th scope="col">Score</th></tr>Default scope Is a Trap
Browsers try to guess scope, but the guess is unreliable for anything beyond the simplest grid. Always set scope yourself to be sure.
Use thead and tbody
Wrap header rows in thead and data rows in tbody. It clarifies structure for assistive tech and makes your markup far easier to read.
<thead>
<tr><th scope="col">Name</th></tr>
</thead>
<tbody>
<tr><th scope="row">Ada</th></tr>
</tbody>How a Screen Reader Reads It
Move to a data cell and the user hears the row header, the column header, then the value. Good scope is what makes that announcement accurate.
One Header Cell, One Job
Keep a th to a single role: a column header or a row header. Mixing data and labels in one cell muddies the association for everyone.
Test by Reading One Cell
Pick a random data cell and ask: do its headers fully explain it? If you cannot tell what a number means from its headers, your scope is wrong.
A Two-Axis Example
Column headers on top, row headers on the left, data in the middle. This matrix shape covers the vast majority of tables you will build.
<tr><th scope="row">Ada</th><td>92</td><td>88</td></tr>Quick Check
A user arrows onto a data cell deep inside a well-marked table.
Recap: Two Axes, Two Scopes
Column headers use scope=col, row headers use scope=row, and every data cell sits where they cross. Set scope yourself and never trust the guess.
常见问题解答
「正确设置行表头和列表头」课时是免费的吗？
是的 — 「正确设置行表头和列表头」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Web Accessibility Academy 课程的其余内容，请升级到 CoddyKit PRO。 Web Accessibility Academy 课程共包含 4 节课。
「正确设置行表头和列表头」这节课中我会学到什么？
将每个单元格与正确的表头关联起来。 你通过在浏览器中直接运行的动手代码来练习 Web Accessibility Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Web Accessibility Academy 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Web Accessibility Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 2 节课，共 4 节。
「正确设置行表头和列表头」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Web Accessibility Academy 课中编写并运行代码吗？
能。每节 Web Accessibility Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。