Reduce CSS bundle size by cutting class names

This is pure awesomeness! Gajus Kuizinas went beyond asset minifiers which resulted from 140KB to 53KB CSS size decrease.

There is one thing a minifier cannot do – change the selector names. This is because a CSS minifier does not control the HTML output. Meanwhile, CSS names can get long.

All the details are in the post worth reading, if still think that webpack can only merge JS files in a bundle.