like rafify, but uses either random-access-file if running in node (or electron) and random-access-web (if running in a browser or similar)
var PolyRAF = require('polyraf')
var raf = PolyRAF(filename) //and if passed a raf instance
var _raf = PolyRAF(raf) //if called with a raf instance, returns it.
//_raf == raf
//also, keeps the filename as a property (non-standard)
console.log(raf.filename)
MIT