One of the ways to reverse engineer Javascript code that's bundled is to use an applet known as Shuji. Shuji is an applet that, in its owner's words: "Reverse engineering JavaScript and CSS sources from sourcemaps".
This article discusses the new Delphi 8 property access specifiers.
Continued discussion of undocumented Delphi 8 Property Access Specifiers, and other ways of adding and removing delegates / events handlers, including clearing the list of all the delegates / event handlers.