Can't Find Locally Installed Module in Windows - node.js

Question

I've got a very simple script that I'm using to test this scenario, but I can't figure out why Node wouldn't be able load the module that's locally installed.
package.json:
{
"name": "Test",
"version": "1.0.0",
"dependencies": {
"cli-progress-bar": "^0.1.0"
}
}
Test.js:
var ProgressBar = require("cli-progress-bar"),
progress = new ProgressBar(),
processed = 0;
function update () {
if (processed < 100) {
progress.show(++processed / 100);
setTimeout(update, 750);
}
}
update();
As far as I can tell, this should just load the cli-progress-bar package, and run a simple progress bar to completion before exiting.
This is the output I get when I try to install the dependencies and run the script:
C:\Users\Benjamin\Desktop\Test>node -v
v4.2.1
C:\Users\Benjamin\Desktop\Test>npm -v
3.3.10
C:\Users\Benjamin\Desktop\Test>npm install
Test#1.0.0 C:\Users\Benjamin\Desktop\Test
└─┬ cli-progress-bar#0.1.0
├── cli-character-set#0.1.0
├─┬ lodash.padleft#3.1.1
│ ├── lodash._basetostring#3.0.1
│ └─┬ lodash._createpadding#3.6.1
│ └── lodash.repeat#3.0.1
├── lodash.padright#3.1.1
└─┬ log-update#1.0.2
├── ansi-escapes#1.1.0
└─┬ cli-cursor#1.0.2
└─┬ restore-cursor#1.0.1
├── exit-hook#1.1.1
└── onetime#1.0.0
npm WARN EPACKAGEJSON Test#1.0.0 No description
npm WARN EPACKAGEJSON Test#1.0.0 No repository field.
npm WARN EPACKAGEJSON Test#1.0.0 No license field.
C:\Users\Benjamin\Desktop\Test>node Test.js
module.js:339
throw err;
^
Error: Cannot find module 'cli-progress-bar'
at Function.Module._resolveFilename (module.js:337:15)
at Function.Module._load (module.js:287:25)
at Module.require (module.js:366:17)
at require (module.js:385:17)
at Object.<anonymous> (C:\Users\Benjamin\Desktop\Test\Test.js:1:81)
at Module._compile (module.js:435:26)
at Object.Module._extensions..js (module.js:442:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:311:12)
at Function.Module.runMain (module.js:467:10)
I can see that the the package is installed in C:\Users\Benjamin\Desktop\Test\node_modules but I can't seem to use it.
C:\Users\Benjamin\Desktop\Test>dir node_modules
Volume in drive C is OS
Volume Serial Number is 7294-620F
Directory of C:\Users\Benjamin\Desktop\Test\node_modules
11/02/2015 10:00 AM <DIR> .
11/02/2015 10:00 AM <DIR> ..
11/02/2015 10:00 AM <DIR> ansi-escapes
11/02/2015 10:00 AM <DIR> cli-character-set
11/02/2015 10:00 AM <DIR> cli-cursor
11/02/2015 10:00 AM <DIR> cli-progress-bar
11/02/2015 10:00 AM <DIR> exit-hook
11/02/2015 10:00 AM <DIR> lodash.padleft
11/02/2015 10:00 AM <DIR> lodash.padright
11/02/2015 10:00 AM <DIR> lodash.repeat
11/02/2015 10:00 AM <DIR> lodash._basetostring
11/02/2015 10:00 AM <DIR> lodash._createpadding
11/02/2015 10:00 AM <DIR> log-update
11/02/2015 10:00 AM <DIR> onetime
11/02/2015 10:00 AM <DIR> restore-cursor
0 File(s) 0 bytes
15 Dir(s) 283,532,754,944 bytes free
C:\Users\Benjamin\Desktop\Test>npm ls
Test#1.0.0 C:\Users\Benjamin\Desktop\Test
└─┬ cli-progress-bar#0.1.0
├── cli-character-set#0.1.0
├─┬ lodash.padleft#3.1.1
│ ├── lodash._basetostring#3.0.1
│ └─┬ lodash._createpadding#3.6.1
│ └── lodash.repeat#3.0.1
├── lodash.padright#3.1.1
└─┬ log-update#1.0.2
├── ansi-escapes#1.1.0
└─┬ cli-cursor#1.0.2
└─┬ restore-cursor#1.0.1
├── exit-hook#1.1.1
└── onetime#1.0.0
Every time I try to run the script, I get the same error.

Answer 1

The reason why you cannot find module called "cli-progress-bar" is because that module is not exposing itself correctly. The package.json file has a property called main which must be set to the name of script being exported from module. If script is called index.js npm will find it however because script is called bar.js and the package.json file is saying the main file is called index.js it is not being exposed properly and cannot be found by require.