Function on

on(
    element: HSAXElement,
    notification: string | string[],
    listener: (notification: string, element: HSAXElement) => void,
): void
Register a listener for AX events on a specific element
Parameters
- element: HSAXElement
  An HSAXElement to watch. Passing an application's element causes matching notifications to bubble up from anywhere in that application's hierarchy (e.g. AXWindowCreated for any window in the app, not just one); passing a specific descendant element scopes the notification to just that element
- notification: string | string[]
  An event name, or an array of event names, to watch for with the same listener
- listener: (notification: string, element: HSAXElement) => void
  A function called with the notification name and the accessibility element it applies to
Returns void
Remarks
When notification is an array, registration is all-or-nothing: if any one of them fails, none are left registered.

Throws
Throws an Error on failure; wrap calls in try/catch to handle it.