Built on a lazy Sunday after seeing this tweet (https://twitter.com/intigriti/status/1272145863868104705?s=20) I present to you, ParameterMiner! Pipe in a list of javascript urls and ParameterMiner pulls all the variable names.

  -length int
        Minimum length variable to collect
  -s    saves output to file named from base url of source
  -save
        saves output to file named from base url of source

echo https://news.ycombinator.com/hn.js?qjUdg9dZheJfdx2Zo5qF | paramMiner.exe

j
on
n1
rks
a
id
unv
ks
el
sp
n
up
trs
req
url
i
s
pair
next

echo https://news.ycombinator.com/hn.js?qjUdg9dZheJfdx2Zo5qF | paramMiner.exe -l 1

unv
ks
req
next
id
el
pair
url
up
trs
n1
sp
rks
on