We recently introduced a new redesigned functions feature for Construct 3. Check out that blog post in case you missed it. We have a few more things we wanted t...
The way function parameters now work is far better. The problem with completely dynamic calls is there is no way to know which parameters should be added. Function mapping solves the problem of calling by a string while still being able to pass along known parameters. Normally completely dynamic function calls are not necessary - if you restructure your functions to work with the new system, they may well be much cleaner and easier to understand afterwards.
I'm not saying the way it works now is worst, I just don't feel as free as I used to before changing to function maps. Just take that in consideration now that you are working with the javascript feature, it will definitely constrast.
Keep up the good work.