ebidel

// An `Object.observe()` "polyfill" using ES6 Proxies.
//
// Current `Object.observe()` polyfills [1] rely on polling
// to watch for property changes. Proxies can do one better by
// observing property changes to an object without the need for
// polling.
//
// Known limitations of this technique:
// 1. the call signature of `Object.observe()` will return the proxy
//    object. The original object needs to be overwritten with this return value.