JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/bluebird/2.9.3/bluebird.min.js"></script>

JavaScript

function makeCallWith3SecondLatency(cb) {
    console.log('mocking a call with 3 second latency...');
    var mockResult = 'the result';
    setTimeout(function() { cb(mockResult); }, 3000);
}

function doSomethingAsync(minDelay) {
    return Promise.join(
                    new Promise(function(resolve) { makeCallWith3SecondLatency(resolve); }),
                    Promise.delay(minDelay).then(function() { console.log('artificially delaying 5 seconds with Promise.delay') }),
                    function(result) { return result; });
}

function printResult(result) {
    console.log('result: ' + result)   
}

var minDelay = 5000;
doSomethingAsync(minDelay).then(printResult);