add documentation on the cookies symbol

Author: 1cg

www/docs.md

@@ -438,6 +438,8 @@ Here is a table of available symbols:
 	the detail of the event that triggered the current handler, if any
 `sender`
 	the element that sent the current event, if any
+`cookies`
+    an [api](/expressions/cookies) to access cookies
 {% endsyntaxes %}
 
 Note that the `target` is the element that the event *originally* occurred on.
@@ -446,6 +448,8 @@ Event handlers, discussed [below](#on), may be placed on parent elements to take
 of [event bubbling](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Building_blocks/Events#event_bubbling_and_capture)
 which can reduce redundancy in code.
 
+Note that JavaScript global symbols such as `window` & `localStorage` are also available.
+
 ### Logging To The Console
 
 If you wish to print something to the `console` you can use the [`log` command](/commands/log):