ProxyPromise.js

class ProxyPromise extends Promise {
    constructor(...args) {
        super(...args);
        return new Proxy(this, {
            get(target, property, receiver) {
                if (property in target) {
                    const prop = Reflect.get(target, property, receiver);
                    if (typeof prop === "function") {
                        return prop.bind(target);
                    } else {
                        return prop;
                    }
                } else {
                    return (...args) =>
                        new ProxyPromise((resolve, reject) =>
                            target.then(v => resolve(v[property](...args)))
                                .catch(reject)
                        );
                }
            }
        });
    }
}

const obj = {
    doStuff() {
        return {
            doMoreStuff() {
                return console.log("Work Work")
            }
        };
    }
};

ProxyPromise.resolve(obj).doStuff().doMoreStuff();