nice-time.js

function hourString(date) {
    // return date.toLocaleTimeString([], {hour: 'numeric', minute: '2-digit'})
    return `${('0' + date.getHours()).slice(-2)}:${(
        '0' + date.getMinutes()
    ).slice(-2)}`
}

function dayString(date) {
    const days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
    return days[date.getDay()]
}

function monthString(date) {
    const months = [
        'Jan',
        'Feb',
        'March',
        'Apr',
        'May',
        'June',
        'July',
        'Aug',
        'Sept',
        'Oct',
        'Nov',
        'Dec',
    ]
    return months[date.getMonth()]
}

// Get something nicely readable - at least to my personal taste.
export default function niceTime(date, { now = undefined } = {}) {
    const then = new Date(date)
    now = now || new Date()
    const secondsAgo = (now - then) / 1000
    if (secondsAgo < -60 * 60 * 24) {
        return 'in the future?!'
    }
    if (secondsAgo < -60) {
        return 'soon?!'
    }
    if (secondsAgo < 90) {
        return 'now'
    }
    if (secondsAgo < 60 * 10) {
        return `${Math.round(secondsAgo / 60)} minutes ago`
    }
    if (secondsAgo < 60 * 60) {
        return `${Math.round(secondsAgo / 60 / 5) * 5} minutes ago`
    }
    if (
        secondsAgo < 60 * 60 * 24 &&
        (now.getDay() === then.getDay() || secondsAgo < 60 * 60 * 6)
    ) {
        return `Today ${hourString(then)}`
    }
    if (secondsAgo < 60 * 60 * 24) {
        return `Yesterday ${hourString(then)}`
    }
    if (secondsAgo < 60 * 60 * 24 * 3) {
        return `${dayString(then)} ${hourString(then)}`
    }
    if (then.getYear() === now.getYear()) {
        return `${then.getDate()} ${monthString(then)} ${hourString(then)}`
    }
    return `${then.getDate()} ${monthString(
        then,
    )} ${then.getFullYear()} ${hourString(then)}`
}