TimeHelper.js

timehelper.js

const TimeHelper = (() => {
    const units = [
        { name: 'year', millis: 31536000000 },
        { name: 'month', millis: 2592000000 },
        { name: 'week', millis: 604800000 },
        { name: 'day', millis: 86400000 },
        { name: 'hour', millis: 3600000 },
        { name: 'minute', millis: 60000 },
        { name: 'second', millis: 1000 },
    ];

    const formatRelativeTime = (date, baseDate = new Date()) => {
        const elapsed = date - baseDate;
        const absElapsed = Math.abs(elapsed);

        for (const unit of units) {
            const delta = Math.round(absElapsed / unit.millis);
            if (delta >= 1) {
                const formatter = new Intl.RelativeTimeFormat('en', { numeric: 'auto' });
                return formatter.format(Math.sign(elapsed) * delta, unit.name);
            }
        }
        return 'just now';
    };

    return {
        fromNow: (date) => formatRelativeTime(new Date(date)),
    };
})();