uglify-js in nodeJS "Cannot find module"

Question

Here i am creating application to compress a javascript file

Steps i made,

Installed nodeJS in my local machine
checked node and npm is working
Installed "uglify-js" by "npm install uglify-js -g" and installed
When i try to run by "node server.js" in command prompt throwing error

Error : Cannot find module 'uglify-js'

Server.js

var UglifyJS = require('uglify-js');
var fs = require('fs');

var result = UglifyJS.minify('site.js', {
    mangle: true,
    compress: {
        sequences: true,
        dead_code: true,
        conditionals: true,
        booleans: true,
        unused: true,
        if_return: true,
        join_vars: true,
        drop_console: true
    }
});

fs.writeFileSync('site.min.js', result.code);

Installed 'uglify-js modules' in

C:\Users\carunraj\AppData\Roaming\npm\node_modules\uglify-js

Server.js in

C:\Program Files\nodejs

Can any one help?

Have you tried installing the module in the same folder as your server.js file instead? Might make a difference. — Andy
– Andy, Commented Mar 27, 2015 at 12:41

Connor Peet · Accepted Answer · 2015-03-27 13:34:37Z

17

You installed uglify globally, it won't be "visible" to your package. You want to run npm install uglify-js (without the -g) inside the directory/package where your script is located.

If you're keeping track of dependencies in a package.json (you should be!), npm install --save uglify-js will automatically add it there for you.

answered Mar 27, 2015 at 13:34

Connor Peet

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1 Comment

Arunraj Over a year ago

npm install uglify-js (without the -g) inside directory itself.

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