org-mode with code example as html

Question

I'm trying to embed a literate code example as HTML in Emacs org-mode.

The idea is that I can use something like

#+BEGIN_SRC html :noweb-ref content :exports source
<span>some content </span>
#+END_SRC

#+BEGIN_HTML :noweb tangle
<<content>>
#+END_HTML

Would something like this be possible? Because currently I have to copy&paste the part I want to be included (quoted) in the HTML source and the SRC bit that I want to show in the document.

EDIT: The concrete use case is that I would like to write a document explaining some HTML constructs (as a code block) and embedding (quoted) those same constructs in the document, without copy+paste

Answer 1

The example below is adapted from something similar I've used for writing about Org-mode. It seems to work for your use case too. The #+OPTIONS: d:RESULTS ensures that the :RESULTS: drawer is exported. Put this in an Org-mode buffer and export to HTML.

#+OPTIONS: d:RESULTS

* Examples

The HTML source
#+name: eg-1
#+begin_src org :results replace drawer :exports both :post wrap-html(text=*this*)
  A <b>bold</b> statement.
#+end_src

Results in the output
#+results: eg-1

* Utils                                                           :noexport:
#+name: wrap-html
#+begin_src emacs-lisp :var text="" :results raw
(concat "#+BEGIN_HTML\n<div class=\"html-output\">\n" text "\n</div>\n#+END_HTML")
#+end_src

You can avoid repeating the headers by adding them as properties to the subtree heading, e.g.

* Example 2
:PROPERTIES:
:results: replace drawer
:exports: both
:post: wrap-html(text=*this*)
:END:

#+name: eg-2
#+begin_src org
  Some <i>italic</i>.
#+end_src

#+results: eg-2

#+name: eg-3
#+begin_src org
  You can <b>nest <i>inline</i> tags</b>.
#+end_src

#+results: eg-3

but note that these headers will apply to every source block in the subtree unless explicitly overridden.