context-proxy traps calls in exactly the same way as normal js Proxy, but this context of every trap will be context parameter of constructor or function call.
import CProxy from 'context-proxy';
const target = {}; // proxy target
const context = {/* context */};
const proxy = CProxy(target, {/* handlers */}, context);
// or with new operator
const proxy = new CProxy(target, {/* handlers */}, context);