Use tomorrow's CSS syntax, today. Via Duo.

Issues with the output should be reported on cssnext issue tracker.

$ npm install duo-cssnext

$ duo --use duo-cssnext

var duo = require("duo")
var cssnext = require("duo-cssnext")

duo(root)
  .entry(entry)
  .use(cssnext())
  .run(fn)

Options are directly passed to cssnext, so checkout cssnext options directly.

Note: from option is by default automatically specified using duo entry source.