Add a note describing currentTarget value outside an event handler (m…

…dn#33798)

files/en-us/web/api/event/currenttarget/index.md

@@ -12,6 +12,8 @@ The **`currentTarget`** read-only property of the {{domxref("Event")}} interface
 
 This will not always be the same as the element on which the event was fired, because the event may have fired on a descendant of the element with the handler, and then [bubbled](/en-US/docs/Learn/JavaScript/Building_blocks/Events#event_bubbling) up to the element with the handler. The element on which the event was fired is given by {{domxref("Event.target")}}.
 
+Note that the value of `currentTarget` is only available in a handler for the event. Outside an event handler it will be `null`. This means that, for example, if you take a reference to the `Event` object inside an event handler and then access its `currentTarget` property outside the event handler, its value will be `null`.
+
 ## Value
 
 An {{domxref("EventTarget")}} representing the object to which the current event handler is attached.