When you have a cabal package that supports cabal configure --write-ghc-environment-files=always (probably ghc8.4.4+):
Generate local documentation setting the following in ~/.cabal/config
haddock
hoogle: True
html: True
hyperlink-source: True
quickjump: True
Then run it
>ls *.cabal
portages.cabal
# see all dependencies
>ghcdoc# or if you know which packages
>ghcdoc base JuicyPixels
when you are not in a cabal project, open the most recent one used, or perhaps open the one closest with respect to distance between pwds the (perhaps deletion is free)
after adding dependencies or changing configuration options, the index page could become stale
It is inconvenient to navigate cabal/store/ghc-8.10.4/ which has directories like
active-0.2.0.14-654db471a95e22980fb0d3b3d7cec63011e700774c9c5a3211a049f9f528295a/
active-0.2.0.14-6883a704d312a6ea3f081cd18a143566eb4c5fcd8fdfb6ccfefb7ed538b84cd8/
adjunctions-4.4-3aabe59fdc0aecdac7fedfdfeddb7a224aeb48182eb612d08ac9c759810e58f9/
adjunctions-4.4-78971b508863d00b0b99318bbcd79b8a5c2c4283c475502cdda830d02e38a42e/
aeson-1.5.6.0-1400182fb6135a245119f175b183386c2e2643075c1b26232f7d33d7c4a0a1fd/
aeson-1.5.6.0-2f2faf03923cd0fc0ab5211880ad2cdadd12bd5c666566be3af8ad1480e017d3/
aeson-1.5.6.0-629873db2839631743eb375cd1eaea7f8e731ec4e104ea17d5149b368c58a486/
aeson-1.5.6.0-6c0cb681b94efe7dcc84c9c01346ffb127b3e5fcc679006c658777bbceee143a/
Furthermore many browsers don't run .js on file:// links, so we open the files through http://localhost