JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
    <head>
        <title>Re Test</title>
        <script src="https://raw.github.com/waylonflinn/re/master/lib/re.js"></script>
        
    </head>
    <body>
        <h1 id="header">Re, Test It Again</h1>
        <div id="broken">If this is all you see, it's broken.</div>
        <div id="intro"></div>
        <ol id="results">
        </ol>
        <div id="final"></div>
        <div id="total"></div>
        <script>test()</script>
    </body>
</html>

JavaScript

function test(){
                
    // PLAY WITH ME
    var RETRIES = 9,
        FAKE_FINISH_RETRIES = 7,
        strategy = {
          "type": Re.STRATEGIES.EXPONENTIAL,
          "initial":50,
          "base":2
        },
        options = {"retries": RETRIES, "strategy": strategy},
        re = new Re(options),
        
    // IMPORTANT STUFF
        last = new Date().getTime(),
        first = last,
        results = document.getElementById("results"),
        fin = document.getElementById("final"),
        total = document.getElementById("total"),
        intro = document.getElementById("intro"),
        broken = document.getElementById("broken"),
        expectedDuration = calcDuration(re, Math.min(RETRIES, FAKE_FINISH_RETRIES)),
        introString = "Starting test (should take "+ Math.min(RETRIES, FAKE_FINISH_RETRIES)+" retries and about  " + expectedDuration/1000 + " seconds).";

    broken.style.display = "none";
    intro.appendChild(document.createTextNode(introString));
    
    re.try(function(retryCount, fail, callback){
            var now = new Date().getTime(),
                text = "RETRY: " + retryCount + " of " + options.retries + ", ELAPSED: " + (now - last),
                result = document.createElement("li");
    
            result.appendChild(document.createTextNode(text));
    
            results.appendChild(result);
            last = now;
            if(retryCount < FAKE_FINISH_RETRIES) throw new Error("Not there yet.");
            else callback(null, retryCount);
        },
        function(err, retries){
            if(err) fin.appendChild(document.createTextNode(err));
            else fin.appendChild(document.createTextNode("It took this many tries: " + retries));
    
            total.appendChild(document.createTextNode("TOTAL ELAPSED TIME: " + (last - first)));
    });
    }

function calcDuration(re, retries){
    var i = 0,
        total = 0;
    for(i = 0; i < retries; i++){
        total += re.retryInterval(i);
   ...