PostCSS Font-Variant lets you use font-variant in CSS, following the specification.
Installation
$ npm install postcss-font-variant
Usage
// dependencies
var postcss = require("postcss")
var fontVariant = require("postcss-font-variant")
// css to be processed
var css = fs.readFileSync("input.css", "utf8")
// process css using postcss-font-variant
var out = postcss()
.use(fontVariant())
.process(css)
.css