The HTML export back-end can create such text areas. It requires an ‘#+ATTR_HTML’ line as shown in the example below with the ‘:textarea’ option. This must be followed by either an example or a source code block. Other Org block types do not honor the ‘:textarea’ option.
By default, the HTML export back-end creates a text area 80 characters wide and height just enough to fit the content. Override these defaults with ‘:width’ and ‘:height’ options on the ‘#+ATTR_HTML’ line.
#+ATTR_HTML: :textarea t :width 40 #+BEGIN_EXAMPLE (defun org-xor (a b) "Exclusive or." (if a (not b) b)) #+END_EXAMPLE