After validation, Reflect.set handles the actual assignment, including cases where the property is inherited, non-writable, or has a setter. This ensures that your validation logic doesn't accidentally bypass JavaScript's native constraints.
; // Store target for later retrieval const proxy = new Proxy(target, handler); proxy.__originalTarget = target; // Optional escape hatch return proxy;
Imagine an object that logs every action, validates changes, and transforms return values—all without altering the original object. With a patterns, you can build a universal interceptor.