R Under development (unstable) (2023-10-09 r85295 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> local({
+   if (!file.exists(f <- '../inst/examples/render-options.R'))
+     f = markdown:::pkg_file('examples', 'render-options.R')
+   source(f, local = TRUE, echo = TRUE)
+ })

> library(markdown)

> mkd <- c("# Header 1", "p1", "## Header 2", "p2")

> cat(mark(mkd, options = "+number_sections"))
<h1 id="header-1"><span class="section-number">1.</span> Header 1</h1>
<p>p1</p>
<h2 id="header-2"><span class="section-number">1.1</span> Header 2</h2>
<p>p2</p>

> cat(mark(mkd, options = "+number_sections+toc"))
<div id="TOC">
<ul class="numbered">
<li><a href="#header-1"><span class="section-number">1.</span> Header 1</a>
<ul>
<li><a href="#header-2"><span class="section-number">1.1</span> Header 2</a></li>
</ul>
</li>
</ul>
</div>
<h1 id="header-1"><span class="section-number">1.</span> Header 1</h1>
<p>p1</p>
<h2 id="header-2"><span class="section-number">1.1</span> Header 2</h2>
<p>p2</p>

> cat(mark("foo\nbar\n"))
<p>foo
bar</p>

> cat(mark("foo\nbar\n", options = "hard_wrap"))
<p>foo<br />
bar</p>

> mkd <- c("`$x$` is inline math $x$!", "", "Display style:", 
+     "", "$$x + y$$", "", "\\begin{eqnarray}\na^{2}+b^{2} & = & c^{2}\\\\\n\\sin^{2}(x ..." ... [TRUNCATED] 

> cat(mark(mkd))
<p><code>$x$</code> is inline math \(x\)!</p>
<p>Display style:</p>
<p>$$x + y$$</p>
<p>\begin{eqnarray} a^{2}+b^{2} &amp; = &amp; c^{2}\\ \sin^{2}(x)+\cos^{2}(x) &amp; = &amp; 1 \end{eqnarray}</p>

> cat(mark(mkd, options = "-latex_math"))
<p><code>$x$</code> is inline math $x$!</p>
<p>Display style:</p>
<p>$$x + y$$</p>
<p>\begin{eqnarray}
a^{2}+b^{2} &amp; = &amp; c^{2}\
\sin^{2}(x)+\cos^{2}(x) &amp; = &amp; 1
\end{eqnarray}</p>

> cat(mark("\nFirst Header  | Second Header\n------------- | -------------\nContent Cell  | Content Cell\nContent Cell  | Content Cell\n"))
<table>
<thead>
<tr>
<th>First Header</th>
<th>Second Header</th>
</tr>
</thead>
<tbody>
<tr>
<td>Content Cell</td>
<td>Content Cell</td>
</tr>
<tr>
<td>Content Cell</td>
<td>Content Cell</td>
</tr>
</tbody>
</table>

> cat(mark("\nFirst Header  | Second Header\n------------- | -------------\nContent Cell  | Content Cell\nContent Cell  | Content Cell\n", 
+     opti .... [TRUNCATED] 
<p>First Header  | Second Header
———–– | ———––
Content Cell  | Content Cell
Content Cell  | Content Cell</p>

> cat(mark("https://www.r-project.org/"))
<p><a href="https://www.r-project.org/">https://www.r-project.org/</a></p>

> cat(mark("https://www.r-project.org/", options = "-autolink"))
<p>https://www.r-project.org/</p>

> cat(mark("~~awesome~~"))
<p><del>awesome</del></p>

> cat(mark("~~awesome~~", options = "-strikethrough"))
<p>~~awesome~~</p>

> cat(mark("2^10^"))
<p>2<sup>10</sup></p>

> cat(mark("2^10^", options = "-superscript"))
<p>2^10^</p>

> cat(mark("H~2~O"))
<p>H<sub>2</sub>O</p>

> cat(mark("H~2~O", options = "-subscript"))
<p>H~2~O</p>

> cat(mark("```r\n1 + 1;\n```"))
<pre><code class="language-r">1 + 1;
</code></pre>

> cat(mark("```{.r}\n1 + 1;\n```"))
<pre><code class="language-r">1 + 1;
</code></pre>

> cat(mark("```{.r .js}\n1 + 1;\n```"))
<pre><code class="language-r js">1 + 1;
</code></pre>

> cat(mark("```{.r .js #foo}\n1 + 1;\n```"))
<pre><code class="language-r js" id="foo">1 + 1;
</code></pre>

> cat(mark("```{.r .js #foo style=\"color:red;\"}\n1 + 1;\n```"))
<pre><code class="language-r js" id="foo" style="color:red;">1 + 1;
</code></pre>

> cat(mark("```{=html}\n<p>raw HTML</p>\n```"))
<p>raw HTML</p>

> cat(mark("```{=latex}\n<p>raw HTML</p>\n```"))

> mkd = "<style>a {}</style><script type=\"text/javascript\">console.log(\"No!\");</script>\n[Hello](#)"

> cat(mark(mkd))
<style>a {}</style><script type="text/javascript">console.log("No!");</script>
<p><a href="#">Hello</a></p>
> 
> proc.time()
   user  system elapsed 
   0.25    0.04    0.28