convertMillisToHuman.js

module.exports = (millis) => {
    let seconds = (millis / 1000).toFixed(0);
    let minutes = Math.floor(seconds / 60);
    let hours = '';

    if (minutes > 59) {
        hours = Math.floor(minutes / 60);
        hours = (hours >= 10) ? hours : '0' + hours;
        minutes = minutes - (hours * 60);
        minutes = (minutes >= 10) ? minutes : '0' + minutes;
    } else if (minutes < 10) {
        minutes = '0' + minutes;
    }

    seconds = Math.floor(seconds % 60);
    seconds = (seconds >= 10) ? seconds : '0' + seconds;
    if (hours !== '') {
        return hours + ':' + minutes + ':' + seconds;
    }
    return minutes + ':' + seconds;
};