<h1>GFM</h1>
<h2>Autolink literals</h2>
<p><a href="http://www.example.com">www.example.com</a>, <a href="https://example.com">https://example.com</a>, and <a href="mailto:contact@example.com">contact@example.com</a>.</p>
<h2>Footnote</h2>
<p>A note<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref aria-describedby="footnote-label">1</a></sup></p>
<h2>Strikethrough</h2>
<p><del>one</del> or <del>two</del> tildes.</p>
<h2>Table</h2>
<table>
<thead>
<tr>
<th>a</th>
<th align="left">b</th>
<th align="right">c</th>
<th align="center">d</th>
</tr>
</thead>
<tbody>
<tr>
<td>123123123</td>
<td align="left">12312312</td>
<td align="right">123123</td>
<td align="center">123123</td>
</tr>
<tr>
<td>123123123</td>
<td align="left">12312312</td>
<td align="right">123123</td>
<td align="center">123123</td>
</tr>
<tr>
<td>123123123</td>
<td align="left">12312312</td>
<td align="right">123123</td>
<td align="center">123123</td>
</tr>
</tbody>
</table>
<h2>Tasklist</h2>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" disabled> to do</li>
<li class="task-list-item"><input type="checkbox" checked disabled> done</li>
</ul>
<h2>List</h2>
<ul>
<li>123</li>
<li>321</li>
</ul>
<section data-footnotes class="footnotes"><h2 class="sr-only" id="footnote-label">Footnotes</h2>
<ol>
<li id="user-content-fn-1">
<p>Big note. <a href="#user-content-fnref-1" data-footnote-backref class="data-footnote-backref" aria-label="Back to content">↩</a></p>
</li>
</ol>
</section>

a	b	c	d
123123123	12312312	123123	123123
123123123	12312312	123123	123123
123123123	12312312	123123	123123

Github favor Markdown Test

GFM

Autolink literals

Footnote

Strikethrough

Table

Tasklist

List

Footnotes