sh
$ npm install --save camelcase

js
var camelCase = require('camelcase');

camelCase('foo-bar');
//=> fooBar

camelCase('foo_bar');
//=> fooBar

camelCase('Foo-Bar');
//=> fooBar

camelCase('--foo.bar');
//=> fooBar

camelCase('__foo__bar__');
//=> fooBar

camelCase('foo bar');
//=> fooBar

console.log(process.argv[3]);
//=> --foo-bar
camelCase(process.argv[3]);
//=> fooBar

camelCase('foo', 'bar');
//=> fooBar

camelCase('__foo__', '--bar');
//=> fooBar