What's the difference between target and forward???

[chenzx]

i use target, and build a local http proxy to let the browser access websites via my local proxy,
but when i goto some web sites, result is error/empty

does the target option remove the original request headers from the browser client?

[michahell]

The question in the title of this issue is a good one, this is quite confusing indeed.
Especially since other proxy packages seem to only use one way of specifying both directions:

The way I understand it, when using something like https://github.com/h2non/toxy you use something like this proxy.forward('http://httpbin.org'), which seems to me be bidirectional