postcss-annotation-constant 
PostCSS plugin for the annotation based binding rule set
Installation
$ npm install postcss-annotation-constantExample
// dependencies
var fs = require("fs")
var postcss = require("postcss")
var constant = require("postcss-annotation-constant")
// css to be processed
var css = fs.readFileSync("input.css", "utf8")
// process css
var output = postcss()
.use(constant(css))
.process(css)
.cssUsing this input.css:
.class {
/*
* @constant
*/
padding: 20px;
}
.class {
padding: 0;
}Run error: Cannot cascade .class
License
The MIT License (MIT)
Copyright (c) 2014 Masaaki Morishita