JSFiddle - React, Tailwind, and code Playground

HTML

<div id="resultTime"></div>

JavaScript

require(["dojo/date/locale","dojo/domReady!"], function(dateLocale) {
    var time_leftD = new Date(1970,0,1);
    time_leftD.setSeconds(287);
    dojo.byId("resultTime").innerHTML = dateLocale.format(time_leftD,{locale:"fr", selector:"time", timePattern:"H:m:s" });
});