` | | | ☑️ | | | `<textarea>` | | ☑️ | ☑️ | | | `<style>` | ☑️ | ☑️ | ☑️ | | | `<xmp>` | | | ☑️ | | | `<iframe>` | ☑️ | ☑️ | ☑️ | | | `<noembed>` | ☑️ | | ☑️ | | | `<noframes>` | ☑️ | | ☑️ | | | `<script>` | | | ☑️ | | | `<plaintext>` | | ☑️ | ☑️ | | [fa]: https://forkaweso.me/ [bootstrap-icons]: https://icons.getbootstrap.com/ [youtube]: https://www.youtube.com/ [vimeo]: https://vimeo.com/ [slideshare]: https://www.slideshare.net/ [speakerdeck]: https://speakerdeck.com/ [gist]: https://gist.github.com/ [mathjax]: https://www.mathjax.org/ [katex]: https://katex.org/ [gfm]: https://github.github.com/gfm/ [commonmark]: https://spec.commonmark.org/ [unicode-6]: https://unicode.org/versions/Unicode6.1.0/ [unicode-13]: https://unicode.org/versions/Unicode13.0.0/

# HedgeDoc Flavored Markdown HedgeDoc has its own markdown dialect which supports many features from [CommonMark][commonmark] and [GitHub Flavored Markdown][gfm]. It also adds some new extensions and is missing some. These tables tell you what exactly we support in HedgeDoc 1.x (HFM 1) and HedgeDoc 2 (HFM 2). ## Typography | Feature | HFM 1 | HFM 2 | CommonMark | GFM | | ------------- | :---: | :---: | :----------------: | :----------------: | | bold | ☑️ | ☑️ | ☑️ | ☑️ | | italic | ☑️ | ☑️ | ☑️ | ☑️ | | underline | ☑️ | ☑️ | (☑️ with ``) | (☑️ with ``) | | strikethrough | ☑️ | ☑️ | (☑️ with ``) | ☑️ | | subscript | ☑️ | ☑️ | (☑️ with `_{`) | (☑️ with `_{`) |
| superscript | ☑️ | ☑️ | (☑️ with `^{`) | (☑️ with `^{`) |
| marked | ☑️ | ☑️ | (☑️ with ``) | (☑️ with ``) |

## Extended typography features

| Feature | HFM 1 | HFM 2 | CommonMark | GFM |
| ------------------------------------------- | :----------------------: | :----------------------: | :--------: | :-: |
| heading | ☑️ | ☑️ | ☑️ | ☑️ |
| inline code | ☑️ | ☑️ | ☑️ | ☑️ |
| indented code blocks | ☑️ | ☑️ | ☑️ | ☑️ |
| code block with language[^highlight] | ☑️ | ☑️ | ☑️ | ☑️ |
| code block with extra features[^extra-code] | ☑️ | ☑️ | | |
| block quote | ☑️ | ☑️ | ☑️ | ☑️ |
| name tag (`[name=...]`) | (☑️)[^in-bq-list] | ☑️ | | |
| time tag (`[time=...]`) | (☑️)[^in-bq-list] | ☑️ | | |
| color tag (`[color=...]`) | (☑️)[^in-bq-list] | ☑️ | | |
| unorderd list | ☑️ | ☑️ | ☑️ | ☑️ |
| ordered list | ☑️ | ☑️ | ☑️ | ☑️ |
| task list | ☑️ | ☑️ | | ☑️ |
| defition list | ☑️ | ☑️ | | |
| emoji | [Unicode 6.1][unicode-6] | [Unicode 13][unicode-13] | | |
| [ForkAwesome][fa] | ☑️ with `` | removed | | |
| [Bootstrap Icons][bootstrap-icons] | | ☑️ with shortcodes | | |
| LaTeX | ☑️[^mj] | ☑️[^kt] | | |

[^highlight]: Code blocks with a given language are rendered using syntax highlighting.
[^extra-code]: Several special "language" keywords can be used for rendering diagrams, charts, etc.
[^in-bq-list]: Use of these tags is only supported within blockquotes and (un)ordered lists.
[^mj]: LaTeX is rendered with [MathJax][mathjax].
[^kt]: LaTeX is rendered with [KaTeX][katex].

## Links & Images

| Feature | HFM 1 | HFM 2 | CommonMark | GFM |
| --------------------- | :---: | :---: | :---------------: | :---------------: |
| link | ☑️ | ☑️ | ☑️ | ☑️ |
| link reference | ☑️ | ☑️ | ☑️ | ☑️ |
| link title | ☑️ | ☑️ | ☑️ | ☑️ |
| autolink with `<>` | ☑️ | ☑️ | ☑️ | ☑️ |
| autolink without `<>` | ☑️ | ☑️ | | ☑️ |
| footnotes | ☑️ | ☑️ | | |
| image | ☑️ | ☑️ | ☑️ | ☑️ |
| image with given size | ☑️ | ☑️ | (☑️ with ``) | (☑️ with ``) |
| table of contents | ☑️ | ☑️ | | |

## Structural elements

| Feature | HFM 1 | HFM 2 | CommonMark | GFM |
| ----------------- | :-------------------: | :---: | :-------------------: | :-------------------: |
| table | ☑️ | ☑️ | (☑️ with ``) | ☑️ |
| horizontal line | ☑️ | ☑️ | ☑️ | ☑️ |
| collapsable block | (☑️ with ``) | ☑️ | (☑️ with ``) | (☑️ with ``) |
| Alerts | ☑️ | ☑️ | | |

## Embeddings

HFM 1 includes support for certain embeddings of external content by using the
`{%keyword parameter %}` syntax. To increase the readability of the markdown code
we decided that HFM 2 should just use plain links if possible.

| Feature | HFM 1 | HFM 2 | CommonMark | GFM |
| --------------------------------------------------- | :---: | :---------------------: | :--------: | :-: |
| PDF (`{%pdf ... %}`) | ☑️ | removed | | |
| [YouTube][youtube] (`{%youtube ... %}`) | ☑️ | with plain link[^embed] | | |
| [Vimeo][vimeo] (`{%vimeo ... %}`) | ☑️ | with plain link[^embed] | | |
| [Slideshare][slideshare] (`{%slideshare ... %}`) | ☑️ | removed | | |
| [Speakerdeck][speakerdeck] (`{%speakerdeck ... %}`) | ☑️ | removed | | |
| [GitHub Gist][gist] (`{%gist ... %}`) | ☑️ | with plain link[^embed] | | |

[^embed]:
The special syntax from HFM 1 is deprecated, but will still work in HFM 2. However, a plain link to the
content should be used.

## HTML

Besides the basic HTML typography elements (``, ``, ``, ``, ``)
the following more special HTML elements are supported by some specification.

| Feature | HedgeDocMark 1 | HedgeDocMark 2 | CommonMark | GFM |
| :-----------: | :------------: | :------------: | :--------: | :-: |
| `` | | | ☑️ | |
| `<textarea>` | | ☑️ | ☑️ | |
| `<style>` | ☑️ | ☑️ | ☑️ | |
| `<xmp>` | | | ☑️ | |
| `<iframe>` | ☑️ | ☑️ | ☑️ | |
| `<noembed>` | ☑️ | | ☑️ | |
| `<noframes>` | ☑️ | | ☑️ | |
| `<script>` | | | ☑️ | |
| `<plaintext>` | | ☑️ | ☑️ | |

[fa]: https://forkaweso.me/
[bootstrap-icons]: https://icons.getbootstrap.com/
[youtube]: https://www.youtube.com/
[vimeo]: https://vimeo.com/
[slideshare]: https://www.slideshare.net/
[speakerdeck]: https://speakerdeck.com/
[gist]: https://gist.github.com/
[mathjax]: https://www.mathjax.org/
[katex]: https://katex.org/
[gfm]: https://github.github.com/gfm/
[commonmark]: https://spec.commonmark.org/
[unicode-6]: https://unicode.org/versions/Unicode6.1.0/
[unicode-13]: https://unicode.org/versions/Unicode13.0.0/}}}}