为给定表格行中的每个单元格设置 CSS 类的有效方法是什么？

发布于 2024-08-08 11:59:19 字数 977 浏览 2 评论 0原文

我在为给定表格行中的每个单元格设置 CSS 类时遇到问题。最初我认为设置父行CSS会影响单元格的样式属性，但这行不通。相反，我必须循环遍历给定行中的所有单元格来更新 CSS 类。

然而，这效率不高。这花了很多时间。考虑我的情况：我有大约 230 行，其中每行有 23 个单元格（总共 5290 个单元格）。

注意：我不使用任何框架。那么您能建议一种原生 JS 方法吗？

更新：

使用Paolo的建议它工作正常。

最初我的自定义CSS类是这样的

.Grid_RowItalicsBold { PADDING-RIGHT: 5px; PADDING-LEFT: 8px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; OVERFLOW: hidden; COLOR: Black; LINE-HEIGHT: 15pt; FONT-STYLE: normal; FONT-FAMILY: Verdana, Arial, Sans-Serif; WHITE-SPACE: nowrap; BACKGROUND-COLOR: yellow; TEXT-DECORATION: none }

，我将其更改为

tr.Grid_RowItalicsBold td{ PADDING-RIGHT: 5px; PADDING-LEFT: 8px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; OVERFLOW: hidden; COLOR: Black; LINE-HEIGHT: 15pt; FONT-STYLE: normal; FONT-FAMILY: Verdana, Arial, Sans-Serif; WHITE-SPACE: nowrap; BACKGROUND-COLOR: yellow; TEXT-DECORATION: none }

并且我使用javascript将该类分配给我的特定行。 :)

原文

I have a problem setting the CSS class for each cell in a given table row. Initially I thought setting the parent row CSS would affect the style properties of cells,
but that doesn't work. Instead I have to loop through all the cells in a given row to updated the CSS class.

However this is not efficient. And it took a lot of time. Consider my situation: I have around 230 rows in which each row has 23 cells (totally 5290 cells).

Note: I don't use any frameworks. so please can you suggest an approach in native JS?

UPDATE :

its working fine using the Paolo's recommendation..

Initially my custom css class is been like this

.Grid_RowItalicsBold { PADDING-RIGHT: 5px; PADDING-LEFT: 8px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; OVERFLOW: hidden; COLOR: Black; LINE-HEIGHT: 15pt; FONT-STYLE: normal; FONT-FAMILY: Verdana, Arial, Sans-Serif; WHITE-SPACE: nowrap; BACKGROUND-COLOR: yellow; TEXT-DECORATION: none }

And i changed this to

tr.Grid_RowItalicsBold td{ PADDING-RIGHT: 5px; PADDING-LEFT: 8px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; OVERFLOW: hidden; COLOR: Black; LINE-HEIGHT: 15pt; FONT-STYLE: normal; FONT-FAMILY: Verdana, Arial, Sans-Serif; WHITE-SPACE: nowrap; BACKGROUND-COLOR: yellow; TEXT-DECORATION: none }

And i assigned this class to my specific rows using javascript. :)

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拥抱影子 2024-08-15 11:59:19

为什么你不能设置行的类并相应地调整你的CSS？

<tr class="myclass">
   <td>...</td>
   <td>...</td>
</tr>

然后在 CSS 中：

tr.myclass td {
    ...
}

无论哪种情况，假设表的 id 为“mytable”，您都可以为所有表行提供您想要的类，如下所示：

var rows = document.getElementById('mytable').getElementsByTagName('tr');
for(var x = 0; x < rows.length; x++) {
    rows[x].className = rows[x].className + " myclass";
}

不过，如果您对整个表执行此操作，您也可以只给表标签本身一个类，然后执行以下操作：

table.myclass tr td {
    ...
}

Why can't you set the class of the row and adjust your css accordingly?

<tr class="myclass">
   <td>...</td>
   <td>...</td>
</tr>

Then in CSS:

tr.myclass td {
    ...
}

In either case, assuming the table has an id of "mytable" you could give all the table rows the class you want like so:

var rows = document.getElementById('mytable').getElementsByTagName('tr');
for(var x = 0; x < rows.length; x++) {
    rows[x].className = rows[x].className + " myclass";
}

If you're doing this to the whole table, though, you might as well just give a class to the table tag itself then do:

table.myclass tr td {
    ...
}

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甜警司 2024-08-15 11:59:19

@kris，单元格中使用的类对于整个单元格是通用的..我只需要更新选定的行..所以我不能只更新它...

看起来你仍然应该使用CSS选择器来做你想做的事情。也许是这样的：

  #mytable td {
    // regular td style
  }
  #mytable .special td {
    // special cell style
  }

<table id="mytable">
  <tbody>
    <tr>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr class="special">
      <td>Data</td>
      <td>Data</td>
    </tr>
  </tbody>
</table>

@kris, the classes used in cells are common for entire cells.. i need to update only the selective rows.. so i cant just update that...

It still seems like you should be using CSS selectors to do what you want. Maybe something like this:

  #mytable td {
    // regular td style
  }
  #mytable .special td {
    // special cell style
  }

<table id="mytable">
  <tbody>
    <tr>
      <td>Data</td>
      <td>Data</td>
    </tr>
    <tr class="special">
      <td>Data</td>
      <td>Data</td>
    </tr>
  </tbody>
</table>

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