Is it possible to write a barebones client side download manager - like wget - with javascript?
I found this anwer: Is there any javascript (and client-side) wget implementation?
That states it most likely is not possible. But most likely is not the same as no.
Then i found out this script: https://gist.github.com/bitnetwork/b6f7ef23fac1044e5dfb1187fd1936af
But with no documentation on how it's used.