帖子中单个表格的 CSS

开发
1

是否可以在帖子中单独为表格设置样式？
Discourse 会移除帖子 HTML 中的所有样式元素。

2

Can you share a screenshot of what you want to do? In discourse you can do pretty much anything you want, but it gets harder the more crazy the idea is

3

I simply want some tables to have a fixed layout, and some auto layout.
I’m referring to tables created with Markdown, BBCode or HTML in composer.

4

If you can’t target them by id or class, by position? eg. instead of main-st → smith, main-st → second-house

What I generally do is go up the DOM until I find an ancestor element with an id, or in lieu of that a few elements with classes, and then go to the child element I want to target. If need be, a “first”, “last” or “nth” pseudo-class should do the job.

5

I think you mean modifying CSS from the admin panel.
What I’m asking is formatting in the composer window.

6

You will need to write a plugin that exposes the classes you want to allow users to use to format their tables. Once you do that, they can apply the classes to their posts.

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7

If you’re on a recent version of Discourse - as this is a recent change - you can also use data-theme attributes.

For example:

<div data-theme-table="fixed">
	
	<table>
		<thead>
			<tr>
				<th>Col A</th>
				<th>Col B</th>
				<th>Col C</th>
			</tr>
		</thead>
		<tbody>
			<tr>
				<td>A1</td>
				<td>B1</td>
				<td>C1</td>
			</tr>
		</tbody>
	</table>
	
</div>

Or with markdown

<div data-theme-table="fixed">

| Col A | Col B | Col C|
|---|---|---|
| A1 | B1 | C1 |

</div>

Would look like this:

Col A Col B Col C
A1 B1 C1

No difference visually - but can be targeted with CSS like this:

[data-theme-table="fixed"] table {
    background: red;
}

The result is a red background for tables inside divs with the attribute data-theme-table="fixed" but no effect on other tables.

Capture18

So all you need to do is define the CSS once and then use the attributes in posts where you want the styles to apply.

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8

This is exactly what I was looking for. Thank you @Johani

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9

looking at white-lister.js.es6, I notice:

  'div[data-*]', /* This may seem a bit much but polls does
                    it anyway and this is needed for themes,
                    special code in sanitizer handles data-*
                    nothing exists for data-theme-* and we
                    don't want to slow sanitize for this case
                  */

does it mean that div[data-theme-*] is no longer required and we can simply use div[data-*] (e.g. div[data-table-layout])?

11

Yes, but I’d say to stick with the -theme- prefix for stuff that’s actually handled by a theme.

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13

Yes, you’re correct @BlackKnob, you can use div[data-*] like div[data-table-layout] and it would have the same effect.

However, like @riking said earlier, you’re much better off sticking with div[data-theme-*] since there might be some work in the future to narrow down whitelisted attributes to div[data-theme-*]. When that happens, all of your posts with div[data-*] would need to be updated accordingly.

That’s why using div[data-theme-*] is recommended here, so that you can stay futureproof.

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14

我应该在哪里放置 CSS 来定位我包裹在表格周围的命名 div？
我是否需要创建并安装自定义主题才能使用这种表格样式方法？

15

欢迎回来 @kaefert :wave:

是的，我建议您这样做。

  1. 前往 admin/customize/themes
  2. 点击 安装
  3. 选择 新建
  4. 为其命名并将类型设置为 component
  5. 添加您的 CSS
  6. 在组件页面的 Include_component_on_these_themes 设置旁点击 添加到所有主题，将组件添加到您的活动主题中。
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17

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