complete-markdown-cheatsheet

Complete Markdown Cheatsheet

Common Mark Implementation

1. Basic Markdown

1.1. Heading

Support: all markdown flavour Syntaxes

## h2 Heading
### h3 Heading
#### h4 Heading
##### h5 Heading
###### h6 Heading

Showcases

h2 Heading

h3 Heading

h4 Heading

h5 Heading

h6 Heading

Syntaxes

h1 Heading
===================
h2 Heading
-------------------

Showcases

h1 Heading

h2 Heading

Notes:

• Always put a space between # and the heading name

• Heading with === or --- are not recommended

1.2. Paragraphs

Notes:

• To create paragraphs, use a blank line to separate one or more lines of text.

• Don't ident paragraphs with spaces or tabs

Syntaxes

This is the first paragraph.

This is the second paragraph

Showcases

This is the first paragraph.

This is the second paragraph

1.3 Line Break

Notes:

• To create a line break, end a line with two or more spaces, and then type return

• Or use the <br> HTML tag

Syntaxes

This is the first line.  
And this is the second line.

Showcases

This is the first line. And this is the second line.

Alternative Syntaxes

First line with the HTML tag after.<br>
And the next line.

Showcases

First line with the HTML tag after. And the next line.

1.4. Emphasis

Syntaxes

**This is bold text**
__This is bold text__
*This is italic text*
_This is italic text_
We have **bold***italic*
This text is ***really important***
This text is ___really important___
This text is __*really important*__
This text is **_really important_**

Showcases

This is bold text This is bold text This is italic text This is italic text We have bold*italic This text is **really important This text is really important This text is __really important*__ This text is really important**

1.5. Blockquotes

Notes:

• Space is needed after the marker >;

• You could just add only one > at the first line;

• Blockquotes can be nested

• Blockquotes can contain multiple paragraphs. Add a > between the paragraphs.

• Blockquotes can contain other Markdown formatted elements. But not all elements can be used.

Syntaxes

> Blockquotes can also be nested...
>> ...by using additional greater-than signs right next to each other...
> > > ...or with spaces between arrows.

Showcases

Blockquotes can also be nested...

...by using additional greater-than signs right next to each other...

...or with spaces between arrows.

Syntaxes

> Dorothy followed her through many of the beautiful rooms in her castle.
>
> The Witch bade her clean the pots and kettles and sweep the floor and keep the fire fed with wood.

Showcases

Dorothy followed her through many of the beautiful rooms in her castle.

The Witch bade her clean the pots and kettles and sweep the floor and keep the fire fed with wood.

Syntaxes

> #### The quarterly results look great!
>
> - Revenue was off the chart.
> - Profits were higher than ever.
>
>  *Everything* is going according to **plan**.

Showcases

The quarterly results look great!

• Revenue was off the chart.

• Profits were higher than ever.

  Everything is going according to plan.

1.6. Lists

1.6.1. Unordered

Syntaxes

+ To start a list, there should be an empty line above
+ Create a list by starting a line with `+`, `-`, or `*`
- Changing the sign will add a linespace
+ Add text under an item  
This is a text under an item. Notice that there are two spaces at the end above.
- Sub-lists are made by indenting 2 spaces:
  * Item 2a
  * Item 2b
* Item 3

To end a list, there should be one empty line above.

Showcases

• To start a list, there should be an empty line above

• Create a list by starting a line with +, -, or *

• Changing the sign will add a linespace

• Add text under an item

  This is a text under an item. Notice that there are two spaces at the end above.

• Sub-lists are made by indenting 2 spaces:

  • Item 2a

  • Item 2b

• Item 3

To end a list, there should be one empty line above.

1.6.2. Ordered

Syntaxes

1. Item 1
1. Item 2  
Notice that the sequence number is irrelevant. 
Markdown will change the sequence automatically when renderring. 
Notice that there are two spaces at the end above to make a new text under item.
3. Sub-lists are made by indenting 4 spaces
    1. Item 3a
    2. Item 3b
8. Any number for item 4

Showcases

1. Item 1

2. Item 2

   Notice that the sequence number is irrelevant.

   Markdown will change the sequence automatically when renderring.

   Notice that there are two spaces at the end above to make a new text under item.

3. Sub-lists are made by indenting 4 spaces

   1. Item 3a

   2. Item 3b

4. Any number for item 4

Syntaxes

57. will started with offset 57
1. so it will be 58

Showcases

1. will started with offset 57

2. so it will be 58

1.7. Elements in Lists

Notes:

• To add another element in a list while preserving the continuity of the list, indent the element four spaces or one tab

Syntaxes

* This is the first list item.
* Here's the second list item.
    I need to add another paragraph below the second list item.
* And here's the third list item.

Showcases

• This is the first list item.

• Here's the second list item.

  I need to add another paragraph below the second list item.

• And here's the third list item.

Showcases

• This is the first list item.

• Here's the second list item.

  I need to add another paragraph below the second list item.

• And here's the third list item.

Showcases

• This is the first list item.

• Here's the second list item.

  A blockquote would look great below the second list item.

• And here's the third list item.

Syntaxes

1.  Open the file containing the Linux mascot.
2.  Linux mascot called Tux.
    ![Tux, the Linux mascot](https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/Tux.png/220px-Tux.png)
3.  Tux is cool.

Showcases

1. Open the file containing the Linux mascot.

2. Linux mascot called Tux.

   
3. Tux is cool.

But, for text element in ordered list, add five spaces

1. This is the first list item.

2. Here's the second list item.

   I need to add another paragraph below the second list item.

3. And here's the third list item.

But, for quote in ordered list, add five spaces

1. This is the first list item.

2. Here's the second list item.

   A blockquote would look great below the second list item.

3. And here's the third list item.

But, for code blocks in the lists, add eight spaces or two tabs.

1. Open the file.

2. Find the following code block on line 21:

   <html>
     <head>
       <title>Test</title>
     </head>

3. Update the title to match the name of your website.

1.8. Code

Notes:

• Inline codes is written inside ` `

• or idented by add four spaces or one tab before

Syntaxes

This is inline `code`.

Showcases

This is inline code.

Syntaxes

    // Some comments
    line 1 of code
    line 2 of code
    line 3 of code

Showcases

// Some comments
line 1 of code
line 2 of code
line 3 of code

Syntaxes

    <html>
      <head>
        <title>Test</title>
      </head>

Showcases

<html>
  <head>
    <title>Test</title>
  </head>

1.9. Links

Example

This is link This is link with title

Or, directly put the link

https://example.com/ [e-mail]

Or with <>

https://www.markdownguide.org [e-mail]

But, to prevent automated linking

https://www.example.com

Or add emphasize

I love supporting the EFF. This is the Markdown Guide. See the section on code.

1.11. Reference-style Links

I know Indonesia I also know etymology of Indonesia I knew History of Indonesia

Or, put reference in text

It was a hobbit-hole, and that means comfort.

But, be careful with spaces in the links, put %20 as space

example %20 link example without %20

1.10. Images

Notes:

• It is not recommended to use image links in reference format. Some apps will not preview those images.

• Specifying size of image is supported only in some extended markdown (such as markdown-it).

Syntaxes

![Image Alt Text](/url/to/image.png "Optional Text")
![Image Alt Text](/url/to/image.png "Image specified with width and height" =800x600)
![Image Alt Text](/url/to/image.png =800x600)
![Image Alt Text](/url/to/image.png "Image specified with width" =800x)
![Image Alt Text](/url/to/image.png "Image specified with height" =x600)

Showcases

![Wikipedia](https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Wikipedia_Logo_1.0.png/240px-Wikipedia_Logo_1.0.png "Wikipedia logo with specific size" =60x60)

Syntaxes

![Image Alt Text][id1]
![Image Alt Text][id2]

Showcases

1.11. Escaping Characters

Note:

• add a backslash \ in front of the character.

Example

* star \ backslash itself ` backtick { } curly braces ! exclamation mark

1.12. HTML Code

Example

This word is bold. This word is italic.

1.13. Horizontal Rules

Example

2. Extended Markdown

2.1. Heading ID

Support: Markdown Extra , Maruku, kramdown

Markdown:

### My Great Heading {#heading-ids}

Markdown

My Great Heading

In HTML:

My Great Heading

Link to Heading IDs

2.2. Code Fencing and Highlighting

Notes:

• We can make block code fences without need to be idented

• lang is optional to specify the language of the code; if not specified, the app won't highlight the code;

• We need one empty line before

Syntaxes

This is a fenced code block.
```

***Syntaxes***

    This is another fenced code block.

***Showcases***

This is a fenced code block.

~~~
No language indicated, so no syntax highlighting.
s = "There is no highlighting for this."
But let's throw in a <b>tag</b>.
~~~


***Showcases*** (`javascript`)

```javascript
var s = "JavaScript syntax highlighting";
alert(s);

Showcases (python)

def function():
    #indenting works just fine in the fenced code block
    s = "Python syntax highlighting"
    print s

Showcases (ruby)

require 'redcarpet'
markdown = Redcarpet.new("Hello World!")
puts markdown.to_html

2.3. Tables

Notes:

• we can set alignment in table with a colon (:)

• we can add formatting text, links, code and HTML character code, but not: heading, headings, blockquotes, lists, horizontal rules, images, HTML tags, or fenced code

Syntaxes

| Option | Description |
| ------ | ----------- |
| data   | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext    | extension to be used for dest files. |

Showcases

Option	Description
data	path to data files to supply the data that will be passed into templates.
engine	engine to be used for processing templates. Handlebars is the default.
ext	extension to be used for dest files.

Syntaxes

| Syntax      | Description | Test Text is long    |
| :---        |    :----:   |          ---: |
| Header from      | Title       | Here's this  is |
| Paragraph   | Text        | And more   |

Showcases

Syntax	Description	Test Text is long
Header from	Title	Here's this is
Paragraph	Text	And more

Syntaxes

| Syntax      | Description | Test Text is long    |
| :---        |    :----:   |          ---: |
| [Example](https://www.example.com/)      | **Title**       | `Here's this  is` |
| Paragraph   | Text        | And more   |

Showcases

Syntax	Description	Test Text is long
Example	Title	Here's this is
Paragraph	Text	And more

2.4. Footnote

Example: The First Part Here's a simple footnote, and here's a longer one,, and

Example: The Second Part : This is the first footnote. : Here's one with multiple paragraphs. For example like this : code or code in paragrahps code and codes

Or add inline footnote Another example of footnote 1 link and footnote 2 link. Or to add inline footnote^[Text of inline footnote] definition.

Or duplictade reference This duplicated footnote reference.

and multiple paragraphs. : Another footnote text.

2.4. Strikethrough, Highlighting, Underline

Example of strikethrough strikethrough In HTML: strikethrough

Example of mark/highlighting ==marked text== in HTML: marked text

Example of underline underline in HTML: underline

2.5. Task Lists

Example

• Write the press release

• Update the website

• Contact the media

2.6. Definition Lists

Example

First Term : This is the definition of the first term.

Second Term : This is one definition of the second term. : This is another definition of the second term.

In HTML:

First TermThis is the definition of the first term.Second TermThis is one definition of the second term.This is another definition of the second term.

Or

Term 1 : Definition 1 with lazy continuation.

Term 2 with inline markup : Definition 2 { some code, part of Definition 2 }

Third paragraph of definition 2.

Or in compact style:

Term 1 ~ Definition 1

Term 2 ~ Definition 2a ~ Definition 2b

2.7. Emojies

Emoji can be copy pasted

Gone camping! ⛺ Be back soon. That is so funny! 😂

Or, use markdown

Gone camping! :tent: Be back soon. That is so funny! :joy:

Classic markup: :wink: :crush: :cry: :tear: :laughing: :yum:

Shortcuts (emoticons): :-) :-( 8-) ;)

2.9. Typographic replacements

Example

(c) (C) (r) (R) (tm) (TM) (p) (P) +- test.. test... test..... test?..... test!.... !!!!!! ???? ,, -- --- "Smartypants, double quotes" and 'single quotes'

2.10. Superscript and Subscript

Example Superscript x^2^ In HTML: x2

Example Subscript H~2~O In HTML: H2O

2.11. Inserted Text

Example ++Inserted text++ In HTML: This text has been inserted

2.12. Abbreviations

Example

The "HTML" specification is maintained by the "W3C". [HTML]: Hyper Text Markup Language [W3C]: World Wide Web Consortium

In HTML: The HTML specification is maintained by the W3C.

2.13. HTML Entities and Character Codes

Example

© & ¨ ™ ¡ £ & < > ¥ € ® ± ¶ § ¦ ¯ « · |

Or

X² Y³ ¾ ¼ × ÷ »

Or

18ºC " '

2.14. Latex

Note:

• Sometimes with \( and \) brackets

Example

$E=mc^2$

\(\sqrt{3x-1}+(1+x)^2\)

$\sin(\alpha)^{\theta}=\sum_{i=0}^{n}(x^i + \cos(f))$

Or, inline

The Gamma function satisfying $\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$ is via the Euler integral

2.15. Mentions, Tag, Font Awesome

Note:

• with fa-something:

Example

This is @mentions This is #tags This is tags This is font awesome :fa-star:

2.16. Diagram

Notes:

• Your app should support the specific library or engine to draw the diagram

• You should specify particular language of the fenced code block and write the definition of your diagram within it.

2.16.1 Mermaid

Notes:

• It's implemented in showdown-mermaid.js

• Rendering diagrams of Flowchart or Sequence or Gantt

• Using mermaid

• Check mermaid doc for more information.

• Code inside { } is optional

Syntaxes

• Flowchart syntax:

    ```mermaid {"align": "left | center | right", "codeblock": true | false}
    graph TD;
    <code content>
    ```

• Sequence diagram syntax:

    ```mermaid {"align": "left | center | right", "codeblock": true | false}
    sequenceDiagram
    <code content>
    ```

• Gantt diagram syntax:

    ```mermaid {"align": "left | center | right", "codeblock": true | false}
    gantt
    <code content>
    ```

Showcases

• Flowchart

```mermaid {"align":"center", "codeblock": true} graph TD; A-->B; A-->C; B-->D; C-->D;

```mermaid {"align":"center"}
graph TD;
           A-->B;
           A-->C;
           B-->D;
           C-->D;

• Sequence diagram

```mermaid {"align":"right"} sequenceDiagram participant Alice participant Bob Alice->>John: Hello John, how are you? loop Healthcheck John->>John: Fight against hypochondria end Note right of John: Rational thoughts prevail! John-->>Alice: Great! John->>Bob: How about you? Bob-->>John: Jolly good!

- Gantt diagram

```mermaid
       gantt
       dateFormat  YYYY-MM-DD
       title Adding GANTT diagram to mermaid
       excludes weekdays 2014-01-10

       section A section
       Completed task            :done,    des1, 2014-01-06,2014-01-08
       Active task               :active,  des2, 2014-01-09, 3d
       Future task               :         des3, after des2, 5d
       Future task2               :         des4, after des3, 5d

2.16.2 Plantuml

Notes:

• It's implemented in showdown-plantuml.js,

• Render diagrams of uml,

• Using plantuml,

• Check plantuml website fpr more information.

• Code inside { } is optional

Syntaxes

```plantuml {"align": "left | center | right", "codeblock": true | false}
@startuml
<code content>
@enduml
```

Showcases

```plantuml {"align":"right"} @startuml participant User

  User -> A: DoWork
  activate A

  A -> B: << createRequest >>
  activate B

  B -> C: DoWork
  activate C
  C --> B: WorkDone
  destroy C

  B --> A: RequestCreated
  deactivate B

  A -> User: Done
  deactivate A

  @enduml

### 2.16.3 Flowchart
*Notes:*
- It's implemented in showdown-flowchart.js
- Render diagrams of flowchart
- Using [flowchart.js](https://github.com/adrai/flowchart.js)
- Check [flowchart website](https://flowchart.js.org/) for more information.
- Code inside `{ }` is optional

***Syntaxes***

    ```flow {"align": "left | center | right", "codeblock": true | false}
    <code content>

Syntaxes

```flowchart {"align": "left | center | right", "codeblock": true | false}
<code content>
```

Showcases

```flow {"align":"center"} st=>start: Start:>https://www.google.com[blank] e=>end:>https://www.google.com op1=>operation: My Operation sub1=>subroutine: My Subroutine cond=>condition: Yes or No?:>https://www.google.com io=>inputoutput: catch something... para=>parallel: parallel tasks

st->op1->cond cond(yes)->io->e cond(no)->para para(path1, bottom)->sub1(right)->op1 para(path2, top)->op1

***Showcases***

```flowchart {"align":"right"}
st=>start: Start
e=>end
op1=>operation: My Operation
sub1=>subroutine: My Subroutine
cond=>condition: Yes
or No?:>https://www.google.com
io=>inputoutput: catch something
st->op1->cond
cond(yes)->io->e
cond(no)->sub1(right)->op1

2.16.4 Graphviz's dot

Notes:

• It's implemented in showdown-viz.js

• Render diagrams of graphviz's dot

• Using viz.js.

• Code inside { } is optional

Syntaxes

The \ of json's "engine" field value is 'circo', 'dot', 'neato', 'osage', 'twopi' in syntax language attribute.

```dot {"engine": "<engine name>", "align": "<align>"}
<code content>
```

Showcases

• Dot example with dot engine:

```dot {"engine":"dot", "align":"center"} digraph G { main -> parse -> execute; main -> init; main -> cleanup; execute -> make_string; execute -> printf init -> make_string; main -> printf; execute -> compare; }

<br>

- Dot example with circo engine:

```dot {"engine":"circo", "align":"right"}
digraph G {
    main -> parse -> execute;
    main -> init;
    main -> cleanup;
    execute -> make_string;
    execute -> printf
    init -> make_string;
    main -> printf;
    execute -> compare;
}

2.16.5 Railroad diagrams

Notes:

• It's implemented in showdown-viz.js,

• Render diagrams of railroad

• Using railroad-diagrams.

• Code inside { } is optional

Syntaxes

```railroad {"align": "left | center | right", "codeblock": true | false}
<code content>
```

Showcases

```railroad {"align":"center"} Diagram( Optional('+', 'skip'), Choice(0, NonTerminal('name-start char'), NonTerminal('escape')), ZeroOrMore( Choice(0, NonTerminal('name char'), NonTerminal('escape'))))

### 2.16.6 WaveDrom
*Notes:*
- It's implemented in showdown-viz.js, 
- Render diagrams of wavedrom 
- Using [wavedrom](https://github.com/wavedrom/wavedrom)
- Check [wavedrom website](https://wavedrom.com) for more information.
- Code inside `{ }` is optional

***Syntaxes***

    ```wavedrom {"align": "left | center | right", "codeblock": true | false}
    <code content>

Showcases

```wavedrom {"align":"center"} {signal: [ {name: 'clk', wave: 'p.....|...'}, {name: 'dat', wave: 'x.345x|=.x', data: ['head', 'body', 'tail', 'data']}, {name: 'req', wave: '0.1..0|1.0'}, {}, {name: 'ack', wave: '1.....|01.'} ]}

***Showcases***

```wavedrom {"align":"right"}
{ signal: [
  { name: "pclk", wave: 'p.......' },
  { name: "Pclk", wave: 'P.......' },
  { name: "nclk", wave: 'n.......' },
  { name: "Nclk", wave: 'N.......' },
  {},
  { name: 'clk0', wave: 'phnlPHNL' },
  { name: 'clk1', wave: 'xhlhLHl.' },
  { name: 'clk2', wave: 'hpHplnLn' },
  { name: 'clk3', wave: 'nhNhplPl' },
  { name: 'clk4', wave: 'xlh.L.Hx' },
]}

2.16.7 Vega and Vega-Lite

Notes:

• It's implemented in showdown-vega.js,

• Render diagrams of Vega and Vega-Lite

• Using vega-embed,

• Check vega website and vega-lite website for more information.

• Code inside { } is optional

Syntaxes

```vega {"align": "left | center | right", "codeblock": true | false}
<code content>
```

Syntaxes

```vega-lite {"align": "left | center | right", "codeblock": true | false}
<code content>
```

Showcases

• Vega example:

```vega {"align":"center"} { "$schema": "https://vega.github.io/schema/vega/v5.json", "width": 200, "height": 200, "autosize": "none",

"signals": [ { "name": "startAngle", "value": 0, "bind": {"input": "range", "min": 0, "max": 6.29, "step": 0.01} }, { "name": "endAngle", "value": 6.29, "bind": {"input": "range", "min": 0, "max": 6.29, "step": 0.01} }, { "name": "padAngle", "value": 0, "bind": {"input": "range", "min": 0, "max": 0.1} }, { "name": "innerRadius", "value": 0, "bind": {"input": "range", "min": 0, "max": 90, "step": 1} }, { "name": "cornerRadius", "value": 0, "bind": {"input": "range", "min": 0, "max": 10, "step": 0.5} }, { "name": "sort", "value": false, "bind": {"input": "checkbox"} } ],

"data": [ { "name": "table", "values": [ {"id": 1, "field": 4}, {"id": 2, "field": 6}, {"id": 3, "field": 10}, {"id": 4, "field": 3}, {"id": 5, "field": 7}, {"id": 6, "field": 8} ], "transform": [ { "type": "pie", "field": "field", "startAngle": {"signal": "startAngle"}, "endAngle": {"signal": "endAngle"}, "sort": {"signal": "sort"} } ] } ],

"scales": [ { "name": "color", "type": "ordinal", "domain": {"data": "table", "field": "id"}, "range": {"scheme": "category20"} } ],

"marks": [ { "type": "arc", "from": {"data": "table"}, "encode": { "enter": { "fill": {"scale": "color", "field": "id"}, "x": {"signal": "width / 2"}, "y": {"signal": "height / 2"} }, "update": { "startAngle": {"field": "startAngle"}, "endAngle": {"field": "endAngle"}, "padAngle": {"signal": "padAngle"}, "innerRadius": {"signal": "innerRadius"}, "outerRadius": {"signal": "width / 2"}, "cornerRadius": {"signal": "cornerRadius"} } } } ] }

<br>

- Vega-Lite example:

```vega-lite {"align":"right"}
{
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "description": "Plots two functions using a generated sequence.",
  "width": 300,
  "height": 150,
  "data": {
    "sequence": {
      "start": 0,
      "stop": 12.7,
      "step": 0.1,
      "as": "x"
    }
  },
  "transform": [
    {
      "calculate": "sin(datum.x)",
      "as": "sin(x)"
    },
    {
      "calculate": "cos(datum.x)",
      "as": "cos(x)"
    },
    {
      "fold": ["sin(x)", "cos(x)"]
    }
  ],
  "mark": "line",
  "encoding": {
    "x": {
      "type": "quantitative",
      "field": "x"
    },
    "y": {
      "field": "value",
      "type": "quantitative"
    },
    "color": {
      "field": "key",
      "type": "nominal",
      "title": null
    }
  }
}

2.16.8 Network Sequence

Notes:

• It's implemented in showdown-sequence.js,

• Render diagrams of sequence

• Using js-sequence-diagrams.

• Code inside { } is optional

Syntaxes

The \ of json's "theme" field value is "hand" or "simple" in syntax language attribute;

```sequence {"theme": "<theme name>", "align": "<align>"}
<code content>
```

Showcases

• Sequence example with hand theme:

```sequence {"theme":"hand", "align":"center"} Alice->Bob: Hello Bob, how are you? Note right of Bob: Bob thinks Bob-->Alice: I am good thanks!

<br>

- Sequence example with simple theme:

```sequence {"theme":"simple", "align":"right"}
Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!

2.17. Table of Content Generation

Example

[TOC]

Or

[[TOC]]

Or

[[TOC]]

2.18. Admonition

Example

!!! note

This is the **note** admonition body

!!! danger Danger Title
    This is the **danger** admonition body

2.19. Attributes

Example

item bold red{style="color:red"} in HTML: item bold red

2.13. Custom Containers or Alerts

Notes:

• Some engine such as Markdown-it, you can add some alert text.

• Available variants:

alert-primary
alert-secondary
alert-success
alert-info
alert-warning
alert-danger
alert-light
alert-dark

Syntaxes

::: alert-info
This is an info text.
:::

::: alert-danger
This is a danger text.
:::

Showcases

::: alert-primary alert-primary :::

::: alert-secondary alert-secondary :::

::: alert-success alert-success :::

::: alert-info alert-info :::

::: alert-warning alert-warning :::

::: alert-danger alert-danger :::

::: alert-light alert-light :::

::: alert-dark alert-dark :::

in HTML

alert-warning

or

alert-info

or

alert-warning

2.14. Comments

[//]: # (These are reference links used in the body of this note and get stripped out when the markdown processor does its job.