Actually, V8 implements an older version of the spec. You can get a polyfill created by the designer of the Proxy spec here: https://github.com/tvcutsem/harmony

Actually, V8 implements an older version of the spec. You can get a polyfill created by the designer of the Proxy spec here: https://github.com/tvcutsem/harmony-reflect https://github.com/tvcutsem/harmony-reflect It requires `node --harmony` (actually only Harmony Proxies and Harmony WeakMaps, but the rest doesn't hurt.)