postcss-font-smoothing 
 
PostCSS plugin to fallback font-smoothing property
Installation
$ npm install postcss-font-smoothing 
Example
input:
.font {
  font-smoothing: antialiased;
} 
output:
.font {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
} 
Usage
// dependencies
var fs = require("fs")
var postcss = require("postcss")
var fontSmoothing = require("postcss-font-smoothing")
// css to be processed
var css = fs.readFileSync("input.css", "utf8")
// process css
var output = postcss()
  .use(fontSmoothing())
  .process(css)
  .css 
License
The MIT License (MIT)
Copyright (c) 2016 Masaaki Morishita
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