, ,
Press F12 for console debug 

  requirements:
  1. jQuery
  2. Bootstrap 4 css
  3. https://rawcdn.githack.com/dimaslanjaka/Web-Manajemen/f3dfa14a3848a8282eb39b1e2f01e1d6e62d7c44/js/jquery.progressBarTimer.min.js Read How to async defer CSS JS perfectly
  
  attribute info:
    countdown = to start countdown
    data-callback = function name of callback
    data-warning = bar warning style 
    data-success = bar success style
    data-base = bar progress style
HTML code

<div data-callback="fn" countdown="5"></div>
<div data-callback="fi" countdown="10"></div>
Javascript code

var elm = $("[countdown]"); 

function fc() {
    console.log("callback Succedeed")
}

function ctd(elm) { //main function
    var tl = 0 < elm.attr("countdown") ? elm.attr("countdown") : 5,
        bs = elm.data("base") ? elm.data("base") : "bg-info",
        bw = elm.data("warning") ? elm.data("warning") : "bg-danger",
        bc = elm.data("success") ? elm.data("success") : "bg-success",
        myCountdown = elm.progressBarTimer({
            warningThreshold: 5,
            timeLimit: tl,
            baseStyle: bs,
            warningStyle: bw,
            completeStyle: bc,
            smooth: !0,
            striped: !0,
            animated: !0,
            height: 0,
            onFinish: function() {
                var callback = elm.data("callback"),
                    xn = window[callback];
                if ("function" == typeof xn) {
                    var x = eval(callback);
                    x()
                } else console.log(callback + " isn't function ")
            },
            label: {
                show: !0,
                type: "percent"
            },
            autoStart: !0
        })
}
0 < elm.length && elm.each(function(e) { //looping elements with attribute countdown
    ctd($(this))
});
Live exampleBootstrap 4 Auto Progress Bar

See the Pen Bootstrap 4 progress bar countdown by dimas lanjaka (@dimaslanjaka) on CodePen.