node-dateformatter/index.js

It formats a javascript date object

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function format(units, timeunit){
return units === 1 ? units + ' ' + timeunit + ' ago' : units + ' ' + timeunit + 's ago';
}

module.exports = function formatTime(dateCreated) {
let diff = Math.abs(new Date() - Date.parse(dateCreated));
        if (diff < (1000 * 60)) {
// less than a minute
let a = Math.floor(Math.abs(new Date() - Date.parse(dateCreated)) / (1000));
        return format(a, 'second');
} else if (diff < (1000 * 60 * 60)) {
// more than a minute and less than 60 minutes
let a = Math.floor(Math.abs(new Date() - Date.parse(dateCreated)) / (1000 * 60));
        return format(a, 'minute');
} else if (diff < (1000 * 60 * 60 * 24)) {
// more than 60 minutes and less than 24 hours
let a = Math.floor(Math.abs(new Date() - Date.parse(dateCreated)) / (1000 * 60 * 60));
        return format(a, 'hour');
} else if (diff < (1000 * 60 * 60 * 24 * 7)) {
// more than 24 hours and less than 7 days
let a = Math.floor(Math.abs(new Date() - Date.parse(dateCreated)) / (1000 * 60 * 60 * 24));
        return format(a, 'day');
} else if (diff < (1000 * 60 * 60 * 24 * 7 * 4.285)) {
// more than 7 days and less than 4 weeks
let a = Math.floor(Math.abs(new Date() - Date.parse(dateCreated)) / (1000 * 60 * 60 * 24 * 7));
        return format(a, 'week');
} else if (diff < (1000 * 60 * 60 * 24 * 365)) {
// more than 4.285 weeks and less than 365 days
let a = Math.floor(Math.abs(new Date() - Date.parse(dateCreated)) / (1000 * 60 * 60 * 24 * 30));
        return format(a, 'month');
} else {
// more than a year
let a = Math.floor(Math.abs(new Date() - Date.parse(dateCreated)) / (1000 * 60 * 60 * 24 * 365));
        return format(a, 'year');
}
}