Fluent Promise Proxy

promise-queue.js

// Credit: https://gist.github.com/malko/d3dee36e7d0d927654439f4c01c8ca0c

function fluentProxy (target, promise = Promise.resolve()) {
    return new Proxy(target, {
        get(target, property) {
            if (target[property] instanceof Function) {
                return (...args) => fluentProxy(target, promise.then(() => target[property](...args)));
            }
        }
    });
};

class Person {
    say(text, delay = 300) {
        return new Promise(resolve => {
            setTimeout(() => {
                resolve(console.log(text));
            }, delay);
        });
    }
}

const me = fluentProxy(new Person());

me.say('hello').say('world').say('bye', 0);