Kanboard-Prod/assets/js/core/utils.js

KB.utils.formatDuration = function (d) {
    if (d >= 86400) {
        return Math.round(d/86400) + "d";
    }
    else if (d >= 3600) {
        return Math.round(d/3600) + "h";
    }
    else if (d >= 60) {
        return Math.round(d/60) + "m";
    }

    return d + "s";
};