A browserify plugin support CSS Modules feature for less.

First install the package: npm install --save less-modulesify
Applying a class to an element you can do something like:

styles.less

.exContent {
    height: 100px;
    width: 100px;
    background-color: red;
}

main.js

var styles = require('./styles.less');
var content = document.getElementById('content');
content.className = styles.exContent;

Then using browserify to build it: browserify -p [less-modulesify] main.js > bundle.js

// Basic Usage, css will be inline
var b = require('browserify')();
b.add('./main.js');
b.plugin(require('less-modulesify'), {
    sourceMap: true,
    lessCompileOption: {
        compress: true
    }
});
b.bundle();

// Output the css file,the base filename will not change
var b = require('browserify')();
b.add('./main.js');
b.plugin(require('less-modulesify'), {
    outputDir: './dist',
    sourceMap: true,
    lessCompileOption: {
        compress: true
    }
});
b.bundle();

• global: browserify's global transforming
• exclude: the files those will not be transformed. Files can be globs
• modulesifyExclude: the files those will not be modulesify transformed. Files can be globs
• outputDir: the target css will be written into this directory.When not setting it,the style will be inline.
• sourceMap: using sourceMap or not. Support inline-sourceMap only
• lessCompileOption: you can using original less options here(like: plugins,compress...),excepts sourcemap, for more just see the less docs

Just in this project's examples folder

MIT