Add mention of processNode to the docs (#627)

* Add mention of `processNode` to the docs

* Fix new code examples highlighting

Author: Renerick

www/docs.md

@@ -160,6 +160,23 @@ Hyperscript has an open, pluggable grammar & some advanced features do not ship
 To use a feature like workers you can install the extension directly by including `/dist/workers.js` after you 
 include hyperscript.
 
+If your HTML is received via AJAX or generated by scripts after initial page load, you need to call 
+`_hyperscript.processNode()` to process the scripts on the new elements.
+
+  ~~~ js
+  element.appendChild(newContent);
+  _hyperscript.processNode(newContent);
+  ~~~
+
+You can also call it from hyperscript itself
+
+  ~~~ hyperscript
+  call _hyperscript.processNode(#new_element_id)
+  ```
+
+Elements added by the [`put`](/commands/put) command are processed automatically; no need to call this function.
+[`Htmx`](https://htmx.org) does the same for all processed fragments.
+
 ## Language Basics {#basics}
 
 A hyperscript script consists of a series of ["features"](/reference#features), the most common of which is an