Request #19492 has been rejected by maximbaz [1]: As far as I can tell these are different packages, merging doesn't make sense. Furthermore, `libpdfium-nojs` does provide `libpdfium`, and `megasync` is doing the right thing to specify a generic dependency. A build failure you experience most probably comes from a usage of some AUR helper that doesn't understand what a "provides" is.
[1] https://aur.archlinux.org/account/maximbaz/
