One of the packages I need to use is not available in npm, but only as a bower package (or of course as a separate download). What's the easiest way to have npm and non-npm packages combined into on JS vendor file?
You could use the copy command to place the file into the resources directory and then configure webpack normally. Just make sure you perform the copy before calling for the resource in another method. I usually set up a path variable if more than one package is a directory other than node_modules.