HTML tags

Here we analyze, which types of HTML tags are allowed inside the content field. Sanitizing fields is desired behavior as seen in Section B.10 of ActivityPub.

Due to firefish using markdown to format their content, the displayed result in the details table can be a bit off, please consult the example.

Details

akkomagotosocialhollomastodonmisskeymitrapleromasharkey

content	content	Example
<b>bold</b>	<b>bold</b>
<strong>strong</strong>	<strong>strong</strong>
<i>italic</i>	<i>italic</i>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>
<em>emphasis</em>	<em>emphasis</em>
<del>old</del><ins>new</ins>	<del>old</del>new
<s>stricken</s>	stricken
<mark>mark</mark>	mark
find <var>x</var> (a variable)	find x (a variable)
<ol><li>ordered</li></ol>	<ol><li>ordered</li></ol>
<ul><li>unordered</li></ul>	<ul><li>unordered</li></ul>
<h1>h1</h1>	h1
<h2>h2</h2>	h2
<h3>h3</h3>	h3
<h4>h4</h4>	h4
<h5>h5</h5>	h5
<h1>h1</h1><h2>h2</h2>	h1h2
<code>code</code>	<code>code</code>
<pre>pre</pre>	<pre>pre</pre>
line<br/>break	line<br/>break
<p>paragraph</p>	<p>paragraph</p>
<small>small</small>	<small>small</small>
<sup>sup</sup>	<sup>sup</sup>
<sub>sub</sub>	<sub>sub</sub>
<a href='https://funfedi.dev'>funfedi</a>	<a href="https://funfedi.dev">funfedi</a>
<script>alert('hi');</script>	alert('hi');
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />	<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo"/>
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	wbr: Fernstraßenbauprivatfinanzierungsgesetz
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	Audio
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	Video Video of a cow eating

content	content	Example
<b>bold</b>	<b>bold</b>
<strong>strong</strong>	<strong>strong</strong>
<i>italic</i>	<i>italic</i>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142" rel="nofollow noreferrer noopener" target="_blank">Issue 142</a>
<em>emphasis</em>	<em>emphasis</em>
<del>old</del><ins>new</ins>	<del>old</del><ins>new</ins>
<s>stricken</s>	<s>stricken</s>
<mark>mark</mark>	<mark>mark</mark>
find <var>x</var> (a variable)	find <var>x</var> (a variable)
<ol><li>ordered</li></ol>	<ol><li>ordered</li></ol>
<ul><li>unordered</li></ul>	<ul><li>unordered</li></ul>
<h1>h1</h1>	<h1>h1</h1>
<h2>h2</h2>	<h2>h2</h2>
<h3>h3</h3>	<h3>h3</h3>
<h4>h4</h4>	<h4>h4</h4>
<h5>h5</h5>	<h5>h5</h5>
<h1>h1</h1><h2>h2</h2>	<h1>h1</h1><h2>h2</h2>
<code>code</code>	<code>code</code>
<pre>pre</pre>	<pre>pre</pre>
line<br/>break	line<br>break
<p>paragraph</p>	<p>paragraph</p>
<small>small</small>	<small>small</small>
<sup>sup</sup>	<sup>sup</sup>
<sub>sub</sub>	<sub>sub</sub>
<a href='https://funfedi.dev'>funfedi</a>	<a href="https://funfedi.dev" rel="nofollow noreferrer noopener" target="_blank">funfedi</a>
<script>alert('hi');</script>
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	wbr: Fernstraßen<wbr>bau<wbr>privat<wbr>finanzierungs<wbr>gesetz
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	Audio
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	Video Video of a cow eating

content	content	Example
<b>bold</b>	<b>bold</b>
<strong>strong</strong>	<strong>strong</strong>
<i>italic</i>	<i>italic</i>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>
<em>emphasis</em>	<em>emphasis</em>
<del>old</del><ins>new</ins>	<del>old</del><ins>new</ins>
<s>stricken</s>	<s>stricken</s>
<mark>mark</mark>	<mark>mark</mark>
find <var>x</var> (a variable)	find <var>x</var> (a variable)
<ol><li>ordered</li></ol>	<ol><li>ordered</li></ol>
<ul><li>unordered</li></ul>	<ul><li>unordered</li></ul>
<h1>h1</h1>	<h1>h1</h1>
<h2>h2</h2>	<h2>h2</h2>
<h3>h3</h3>	<h3>h3</h3>
<h4>h4</h4>	<h4>h4</h4>
<h5>h5</h5>	<h5>h5</h5>
<h1>h1</h1><h2>h2</h2>	<h1>h1</h1><h2>h2</h2>
<code>code</code>	<code>code</code>
<pre>pre</pre>	<pre>pre</pre>
line<br/>break	line<br/>break
<p>paragraph</p>	<p>paragraph</p>
<small>small</small>	<small>small</small>
<sup>sup</sup>	<sup>sup</sup>
<sub>sub</sub>	<sub>sub</sub>
<a href='https://funfedi.dev'>funfedi</a>	<a href='https://funfedi.dev'>funfedi</a>
<script>alert('hi');</script>	<script>alert('hi');</script>
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />	<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>

content	content	Example
<b>bold</b>	<b>bold</b>
<strong>strong</strong>	<strong>strong</strong>
<i>italic</i>	<i>italic</i>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142" rel="nofollow noopener noreferrer" target="_blank">Issue 142</a>
<em>emphasis</em>	<em>emphasis</em>
<del>old</del><ins>new</ins>	<del>old</del>new
<s>stricken</s>	<s>stricken</s>
<mark>mark</mark>	mark
find <var>x</var> (a variable)	find x (a variable)
<ol><li>ordered</li></ol>	<ol><li>ordered</li></ol>
<ul><li>unordered</li></ul>	<ul><li>unordered</li></ul>
<h1>h1</h1>	<p><strong>h1</strong></p>
<h2>h2</h2>	<p><strong>h2</strong></p>
<h3>h3</h3>	<p><strong>h3</strong></p>
<h4>h4</h4>	<p><strong>h4</strong></p>
<h5>h5</h5>	<p><strong>h5</strong></p>
<h1>h1</h1><h2>h2</h2>	<p><strong>h1</strong></p><p><strong>h2</strong></p>
<code>code</code>	<code>code</code>
<pre>pre</pre>	<pre>pre</pre>
line<br/>break	line<br>break
<p>paragraph</p>	<p>paragraph</p>
<small>small</small>	small
<sup>sup</sup>	sup
<sub>sub</sub>	sub
<a href='https://funfedi.dev'>funfedi</a>	<a href="https://funfedi.dev" rel="nofollow noopener noreferrer" target="_blank">funfedi</a>
<script>alert('hi');</script>
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	wbr: Fernstraßenbauprivatfinanzierungsgesetz
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	Audio
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	Video Video of a cow eating

content	text	Example
<b>bold</b>	bold
<strong>strong</strong>	strong
<i>italic</i>	<i>italic</i>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<i>italic with.</i> See [Issue 142](https://codeberg.org/helge/funfedidev/issues/142)
<em>emphasis</em>	<i>emphasis</i>
<del>old</del><ins>new</ins>	~~old~~new
<s>stricken</s>	~~stricken~~
<mark>mark</mark>	mark
find <var>x</var> (a variable)	find x (a variable)
<ol><li>ordered</li></ol>	ordered
<ul><li>unordered</li></ul>	unordered
<h1>h1</h1>	【h1】
<h2>h2</h2>	h2
<h3>h3</h3>	h3
<h4>h4</h4>	h4
<h5>h5</h5>	h5
<h1>h1</h1><h2>h2</h2>	【h1】 h2
<code>code</code>	`code`
<pre>pre</pre>	pre
line<br/>break	line break
<p>paragraph</p>	paragraph
<small>small</small>	<small>small</small>
<sup>sup</sup>	sup
<sub>sub</sub>	sub
<a href='https://funfedi.dev'>funfedi</a>	[funfedi](https://funfedi.dev)
<script>alert('hi');</script>	alert('hi');
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />	-
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	wbr: Fernstraßenbauprivatfinanzierungsgesetz
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	Audio
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	Video Video of a cow eating

content	content	Example
<b>bold</b>	<b>bold</b>
<strong>strong</strong>	<strong>strong</strong>
<i>italic</i>	<i>italic</i>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142" rel="noopener">Issue 142</a>
<em>emphasis</em>	<em>emphasis</em>
<del>old</del><ins>new</ins>	<del>old</del><ins>new</ins>
<s>stricken</s>	<s>stricken</s>
<mark>mark</mark>	<mark>mark</mark>
find <var>x</var> (a variable)	find <var>x</var> (a variable)
<ol><li>ordered</li></ol>	<ol><li>ordered</li></ol>
<ul><li>unordered</li></ul>	<ul><li>unordered</li></ul>
<h1>h1</h1>	<h1>h1</h1>
<h2>h2</h2>	<h2>h2</h2>
<h3>h3</h3>	<h3>h3</h3>
<h4>h4</h4>	<h4>h4</h4>
<h5>h5</h5>	<h5>h5</h5>
<h1>h1</h1><h2>h2</h2>	<h1>h1</h1><h2>h2</h2>
<code>code</code>	<code>code</code>
<pre>pre</pre>	<pre>pre</pre>
line<br/>break	line<br>break
<p>paragraph</p>	<p>paragraph</p>
<small>small</small>	<small>small</small>
<sup>sup</sup>	<sup>sup</sup>
<sub>sub</sub>	<sub>sub</sub>
<a href='https://funfedi.dev'>funfedi</a>	<a href="https://funfedi.dev" rel="noopener">funfedi</a>
<script>alert('hi');</script>	❌
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />	http://pasture-one-actor/assets/nlnet.png
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	wbr: Fernstraßen<wbr>bau<wbr>privat<wbr>finanzierungs<wbr>gesetz
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	Audio
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	Video Video of a cow eating

content	content	Example
<b>bold</b>	<b>bold</b>
<strong>strong</strong>	<strong>strong</strong>
<i>italic</i>	<i>italic</i>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>
<em>emphasis</em>	<em>emphasis</em>
<del>old</del><ins>new</ins>	<del>old</del><ins>new</ins>
<s>stricken</s>	<s>stricken</s>
<mark>mark</mark>	mark
find <var>x</var> (a variable)	find <var>x</var> (a variable)
<ol><li>ordered</li></ol>	<ol><li>ordered</li></ol>
<ul><li>unordered</li></ul>	<ul><li>unordered</li></ul>
<h1>h1</h1>	h1
<h2>h2</h2>	h2
<h3>h3</h3>	h3
<h4>h4</h4>	h4
<h5>h5</h5>	h5
<h1>h1</h1><h2>h2</h2>	h1h2
<code>code</code>	<code>code</code>
<pre>pre</pre>	<pre>pre</pre>
line<br/>break	line<br/>break
<p>paragraph</p>	<p>paragraph</p>
<small>small</small>	<small>small</small>
<sup>sup</sup>	<sup>sup</sup>
<sub>sub</sub>	<sub>sub</sub>
<a href='https://funfedi.dev'>funfedi</a>	<a href="https://funfedi.dev">funfedi</a>
<script>alert('hi');</script>	alert('hi');
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />	<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo"/>
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	wbr: Fernstraßen<wbr/>bau<wbr/>privat<wbr/>finanzierungs<wbr/>gesetz
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	Audio
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	Video Video of a cow eating

content	content	Example
<b>bold</b>	<p><span>bold</span></p>
<strong>strong</strong>	<p><span>strong</span></p>
<i>italic</i>	<p><span>italic</span></p>
<i>italic with.</i> See <a href="https://codeberg.org/helge/funfedidev/issues/142">Issue 142</a>	<p><span>italic with.</span><span> See </span><a rel="nofollow noopener noreferrer" target="_blank" href="https://codeberg.org/helge/funfedidev/issues/142"><span>Issue 142</span></a></p>
<em>emphasis</em>	<p><span>emphasis</span></p>
<del>old</del><ins>new</ins>	<p><span>~~old~~</span><span>new</span></p>
<s>stricken</s>	<p><span>~~stricken~~</span></p>
<mark>mark</mark>	<p><span>mark</span></p>
find <var>x</var> (a variable)	<p><span>find x (a variable)</span></p>
<ol><li>ordered</li></ol>	<p><span>ordered</span></p>
<ul><li>unordered</li></ul>	<p><span>unordered</span></p>
<h1>h1</h1>	<p><span>【h1】</span></p>
<h2>h2</h2>	<p><span>h2</span></p>
<h3>h3</h3>	<p><span>h3</span></p>
<h4>h4</h4>	<p><span>h4</span></p>
<h5>h5</h5>	<p><span>h5</span></p>
<h1>h1</h1><h2>h2</h2>	<p><span>【h1】</span><span><br></span><span>h2</span></p>
<code>code</code>	<p><code>code</code></p>
<pre>pre</pre>	<p><span>pre</span></p>
line<br/>break	<p><span>line<br>break</span></p>
<p>paragraph</p>	<p><span>paragraph</span></p>
<small>small</small>	<p><small><span>small</span></small></p>
<sup>sup</sup>	<p><span>sup</span></p>
<sub>sub</sub>	<p><span>sub</span></p>
<a href='https://funfedi.dev'>funfedi</a>	<p><a rel="nofollow noopener noreferrer" target="_blank" href="https://funfedi.dev"><span>funfedi</span></a></p>
<script>alert('hi');</script>	<p><span>alert('hi');</span></p>
<img src="http://pasture-one-actor/assets/nlnet.png" alt="NLNET Logo" />
wbr: Fernstraßen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz	<p><span>wbr: Fernstraßenbauprivatfinanzierungsgesetz</span></p>
Audio <audio controls src="http://pasture-one-actor/assets/cow_moo.mp3"></audio>	<p><span>Audio</span></p>
Video <video controls width="250"> <source src="http://pasture-one-actor/assets/cow_eating.mp4" type="video/mp4" /> Video of a cow eating</video>	<p><span>Video <br> <br> Video of a cow eating</span></p>