javascript - 'Can't find module fs' when running casperjs on js file -


i trying run casperjs on javascript file have, , when run 

> casperjs index.js

it says

'caspererror: cant find module fs'.

the first line of index.js is

var fs = require('fs');

i have node, casperjs, , phantomjs installed, why can't find fs? if correct, fs node's file system?

update: added nodejs $path, still no luck.

did install phantomjs/casperjs modules node fs module in project? don't seem mix well.

i ran issue installed of these modules , getting same error message mentioned above.

caspererror: can't find module fs

once uninstalled node 'fs' module, worked fine.

npm uninstall fs

-

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