showdownjs/test/features/#164.4.tasklists.html

<h1 id="mythings">my things</h1>

<ul>
    <li>foo</li>
    <li style="list-style-type: none;"><input type="checkbox" disabled style="margin: 0px 0.35em 0.25em -1.6em; vertical-align: middle;"> bar</li>
    <li style="list-style-type: none;"><input type="checkbox" disabled style="margin: 0px 0.35em 0.25em -1.6em; vertical-align: middle;"> baz</li>
    <li style="list-style-type: none;"><input type="checkbox" disabled style="margin: 0px 0.35em 0.25em -1.6em; vertical-align: middle;" checked> bazinga</li>
</ul>

<p>otherthings</p>