countdown from seconds #time #js

countdown.js

export const countdown = (function () {
    const pad = t => {
        return (t + '').length < 2 ? pad('0' + t + '') : t;
    }
    return s => {
        const d = Math.floor(s / (3600 * 24));
        s -= d * 3600 * 24;
        const h = Math.floor(s / 3600);
        s -= h * 3600;
        const m = Math.floor(s / 60);
        s -= m * 60;
        const tmp = [];
        (d) && tmp.push(d + 'd');
        (d || h) && tmp.push(h + 'h');
        (d || h || m) && tmp.push(m + 'm');
        tmp.push(s + 's');
        return tmp.join(' ');
    }
}());