---
title: Docs smoke test page
main_menu: false
---

This page serves two purposes:

- Demonstrate how the Kubernetes documentation uses Markdown
- Provide a "smoke test" document we can use to test HTML, CSS, and template
  changes that affect the overall documentation.

## Heading levels

The above heading is an H2. The page title renders as an H1. The following
sections show H3-H6.

### H3

This is in an H3 section.

#### H4

This is in an H4 section.

##### H5

This is in an H5 section.

###### H6

This is in an H6 section.

## Inline elements

Inline elements show up within the text of paragraph, list item, admonition, or
other block-level element.

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor
incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis
nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu
fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
culpa qui officia deserunt mollit anim id est laborum.

### Inline text styles

- **bold**
- _italic_
- ***bold italic***
- ~~strikethrough~~
- <u>underline</u>
- _<u>underline italic</u>_
- **<u>underline bold</u>**
- ***<u>underline bold italic</u>***
- `monospace text`
- **`monospace bold`**

## Lists

Markdown doesn't have strict rules about how to process lists. When we moved
from Jekyll to Hugo, we broke some lists. To fix them, keep the following in
mind:

- Make sure you indent sub-list items **4 spaces** rather than the 2 that you
  may be used to. Counter-intuitively, you need to indent block-level content
  within a list item an extra 4 spaces too.

- To end a list and start another, you need a HTML comment block on a new line
  between the lists, flush with the left-hand border. The first list won't end
  otherwise, no matter how many blank lines you put between it and the second.

### Bullet lists

- This is a list item
* This is another list item in the same list
- You can mix `-` and `*`
    - To make a sub-item, indent two tabstops (4 spaces). **This is different
      from Jekyll and Kramdown.**
        - This is a sub-sub-item. Indent two more tabstops (4 more spaces).
    - Another sub-item.

<!-- separate lists -->

- This is a new list. With Hugo, you need to use a HTML comment to separate two
  consecutive lists. **The HTML comment needs to be at the left margin.**
- Bullet lists can have paragraphs or block elements within them.

      Indent the content to be one tab stop beyond the text of the bullet
      point. **This paragraph and the code block line up with the second `l` in
      `Bullet` above.**

      ```bash
      ls -l
      ```

      - And a sub-list after some block-level content

- A bullet list item can contain a numbered list.
    1.  Numbered sub-list item 1
    2.  Numbered sub-list item 2

### Numbered lists

1.  This is a list item
2.  This is another list item in the same list. The number you use in Markdown
    does not necessarily correlate to the number in the final output. By
    convention, we keep them in sync.
3.  {{<note>}}
    For single-digit numbered lists, using two spaces after the period makes
    interior block-level content line up better along tab-stops.
    {{</note>}}

<!-- separate lists -->

1.  This is a new list. With Hugo, you need to use a HTML comment to separate
    two consecutive lists. **The HTML comment needs to be at the left margin.**
2.  Numbered lists can have paragraphs or block elements within them.

      Just indent the content to be one tab stop beyond the text of the bullet
      point. **This paragraph and the code block line up with the `m` in
      `Numbered` above.**

      ```bash
      $ ls -l
      ```

    - And a sub-list after some block-level content. This is at the same
      "level" as the paragraph and code block above, despite being indented
      more.

### Tab lists

Tab lists can be used to conditionally display content, e.g., when multiple
options must be documented that require distinct instructions or context.

{{< tabs name="tab_lists_example" >}}
{{% tab name="Choose one..." %}}
Please select an option.
{{% /tab %}}
{{% tab name="Formatting tab lists" %}}

Tabs may also nest formatting styles.

1. Ordered
1. (Or unordered)
1. Lists

```bash
$ echo 'Tab lists may contain code blocks!'
```

{{% /tab %}}
{{% tab name="Nested headers" %}}

### Header within a tab list

Nested header tags may also be included.

{{< warning >}}
**Note**: Headers within tab lists will not appear in the Table of Contents.
{{< /warning >}}

{{% /tab %}}
{{< /tabs >}}

### Checklists

Checklists are technically bullet lists, but the bullets are suppressed by CSS.

- [ ] This is a checklist item
- [x] This is a selected checklist item

## Code blocks

You can create code blocks two different ways by surrounding the code block with
three back-tick characters on lines before and after the code block. **Only use
back-ticks (code fences) for code blocks.** This allows you to specify the
language of the enclosed code, which enables syntax highlighting. It is also more
predictable than using indentation.

{{< warning >}}
There is one situation where you need to use indentation for code blocks: when
the contents of the code block contain lines starting with `-` or `*` characters.
This is due to
[blackfriday issue #239](https://github.com/russross/blackfriday/issues/239).
{{< /warning >}}

```
this is a code block created by back-ticks
```

The back-tick method has some advantages.

- It works nearly every time
- It is more compact when viewing the source code.
- It allows you to specify what language the code block is in, for syntax
  highlighting.
- It has a definite ending. Sometimes, the indentation method breaks with
  languages where spacing is significant, like Python or YAML.

To specify the language for the code block, put it directly after the first
grouping of back-ticks:

```bash
ls -l
```

Common languages used in Kubernetes documentation code blocks include:

- `bash` / `shell` (both work the same)
- `go`
- `json`
- `yaml`
- `xml`
- `none` (disables syntax highlighting for the block)


## Links

To format a link, put the link text inside square brackets, followed by the
link target in parentheses. [Link to Kubernetes.io](https://kubernetes.io/) or
[Relative link to Kubernetes.io](/)

You can also use HTML, but it is not preferred.
<a href="https://kubernetes.io/">Link to Kubernetes.io</a>


## Images

To format an image, use similar syntax to [links](#links), but add a leading `!`
character. The square brackets contain the image's alt text. Try to always use
alt text so that people using screen readers can get some benefit from the
image.

![pencil icon](/static/images/pencil.png)

To specify extended attributes, such as width, title, caption, etc, use the
<a href="https://gohugo.io/content-management/shortcodes/#figure">figure shortcode</a>,
which is preferred to using a HTML `<img>` tag. Also, if you need the image to
also be a hyperlink, use the `link` attribute, rather than wrapping the whole
figure in Markdown link syntax as shown below.

{{< figure src="/static/images/pencil.png" title="Pencil icon" caption="Image used to illustrate the figure shortcode" width="200px" >}}

Even if you choose not to use the figure shortcode, an image can also be a link. This
time the pencil icon links to the Kubernetes website. Outer square brackets enclose
the entire image tag, and the link target is in the parentheses at the end.

[![pencil icon](/static/images/pencil.png)](https://kubernetes.io)

You can also use HTML for images, but it is not preferred.

<img src="/static/images/pencil.png" alt="pencil icon" />


## Tables

Simple tables have one row per line, and columns are separated by `|`
characters. The header is separated from the body by cells containing nothing
but at least three `-` characters. For ease of maintenance, try to keep all the
cell separators even, even if you heed to use extra space.

| Heading cell 1 | Heading cell 2 |
|----------------|----------------|
| Body cell 1    | Body cell 2    |

The header is optional. Any text separated by `|` will render as a table.

Markdown tables have a hard time with block-level elements within cells, such as
list items, code blocks, or multiple paragraphs. For complex or very wide
tables, use HTML instead.

<table>
<thead>
  <tr>
    <th>Heading cell 1</th>
    <th>Heading cell 2</th>
  </tr>
</thead>
<tbody>
  <tr>
    <td>Body cell 1</td>
    <td>Body cell 2</td>
  </tr>
</tbody>
</table>

## Sidebars and Admonitions

Sidebars and admonitions provide ways to add visual importance to text. Use
them sparingly.

### Sidebars

A sidebar offsets text visually, but without the visual prominence of
[admonitions](#admonitions).

> This is a sidebar.
>
> You can have paragraphs and block-level elements within a sidebar.
>
> You can even have code blocks.
>
> ```bash
> sudo dmesg
> ```
>

### Admonitions

Admonitions (notes, warnings, etc) use Hugo shortcodes.

{{< note >}}
**Note:** Notes catch the reader's attention without a sense of urgency.

You can have multiple paragraphs and block-level elements inside an admonition.

| Or | a | table |
{{< /note >}}

{{< caution >}}
**Caution:** The reader should proceed with caution.
{{< /caution >}}


{{< warning >}}
**Warning:** Warnings point out something that could cause harm if ignored.
{{< /warning >}}