Inline HTML not passed through

[wch]

When raw HTML is added to a Rmd document, any tags that are indented four or more spaces get treated as code instead of raw HTML. @hadley and @jmcphers pointed me to some workarounds, shown below:

---
title: "Untitled"

---

Doesn't work:

<div>
    <div>block 1
    </div>
</div>

*****

Works:

```{r echo=FALSE}
knitr::asis_output(htmltools::htmlPreserve("
<div>
    <div>block 2
    </div>
</div>
"))
```

*****

Works:

<!--html_preserve-->
<div>
    <div>block 3
    </div>
</div>
<!--/html_preserve-->

I suspect this is actually a bug in Pandoc. I'm using 1.13.1 with RStudio 0.99.97.

[jjallaire]

It's not a bug in pandoc it's actually expected behavior! This is because pandoc allows markdown in HTML, and when you indent 4 spaces that's actually considered a markdown code block. The solution is to use one of the workarounds described by Winston or to just generate HTML without the indentation.

[hadley]

It's not clear that this is desired behaviour in pandoc. One of the example in the manual (under raw_html) is

<table>
    <tr>
        <td>*one*</td>
        <td>[a link](http://google.com)</td>
    </tr>
</table>

I don't think the expectation is that this is transformed into

<table>
<pre>
<tr>
    <td>*one*</td>
    <td>[a link](http://google.com)</td>
</tr>
<pre>
</table>

[hadley]

That said, if I run that block of html through pandoc I get:

<table>
<pre><code>&lt;tr&gt;
    &lt;td&gt;*one*&lt;/td&gt;
    &lt;td&gt;[a link](http://google.com)&lt;/td&gt;
&lt;/tr&gt;</code></pre>
</table>

So it's either a bug in the implementation or the documentation. Might be worth a post to the pandoc mailing list

[wch]

Right, that example is at: http://rmarkdown.rstudio.com/authoring_pandoc_markdown.html#raw-html

[xvrl]

@hadley I'm running into this issue as well. Is there a way to tell rmarkdown to use the markdown_strict variant when producing html output? That would also be a workaround.

[jjallaire]

You can now use the md_extensions parameter to remove the "markdown in html" behavior on a per-document basis.

[yihui]

The example on the rmarkdown website seems to have been fixed. There isn't much we can do on rmarkdown's side. For this issue, we are at the mercy of Pandoc...

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