Customize plugin with conf/userscript.js

[suedunham]

Please forgive a javascript noob. Working with the newest Greebo version, I'd like to customize the plugin by changing the fill opacity. This can be done by modifying the line fillOpacity: 0.1, in lib/plugins/imagemapping/script.js, but that is susceptible to being overwritten by new versions of the plugin. Alternately, I can copy the contents of that file into conf/userscript.js, make that change there, and redirect the include in the first line by changing it to /* DOKUWIKI:include_once ../lib/plugins/imagemapping/jquery.imagemapster.js */. However, this only works if I also rename the script.js file to something else so that both files do not load. Otherwise, errors like the following occur, with property '0' being the first area in the map, property '1' the second, etc.

js.php?t=bootstrap3&tseed=65a13deae29e496ab72baeefd4aa8b21:1 Uncaught TypeError: Cannot read property '1' of null
    at u.MapData.getAllDataForArea (js.php?t=bootstrap3&tseed=65a13deae29e496ab72baeefd4aa8b21:1)
    at HTMLAreaElement.r (js.php?t=bootstrap3&tseed=65a13deae29e496ab72baeefd4aa8b21:1)
    at HTMLAreaElement.n.mouseover (js.php?t=bootstrap3&tseed=65a13deae29e496ab72baeefd4aa8b21:1)
    at HTMLAreaElement.dispatch (jquery.php?tseed=23f888679b4f1dc26eef34902aca964f:3)
    at HTMLAreaElement.q.handle (jquery.php?tseed=23f888679b4f1dc26eef34902aca964f:3)

Obviously, there's something fundamental I don't understand about using conf/userscript.js. I'm hoping to load my script over the plugin's script and so replace it, but either I'm not yet doing it right or that's just now how this is supposed to be used.

What should I put in conf/userscript.js to interact with lib/plugins/imagemapping/script.js without conflicting with it? Does Hogfather change anything about this?

[gamma]

It is currently not customizable. But I'll put this on as a feature request, because I stumbled over it as well. For now I'd suggest to modify the script.js directly.

[ajfclark]

I would also like to be able to configure the colour/opacity of the highlight.