@stevescruz/task-master/src/shared/utils/getTimeSince.js

A command-line todo list that allows you to write your tasks, set priorities, view existing tasks and view the next tasks due.

function getTimeSince(timestamp) {
    const timestampUTC = (new Date(timestamp)).valueOf();
    const nowTimestampUTC = (new Date()).valueOf();

    let seconds = Math.floor((nowTimestampUTC - timestampUTC) / 1000);
    let interval = seconds / 31536000;

    if (interval > 1) {
        const years = Math.floor(interval); 
        return `${years}y`;
    }

    interval = seconds / 2628288;

    if (interval > 1) {
        const months = Math.floor(interval);
        return `${months}m`;
    }

    interval = seconds / 86400;

    if (interval > 1) {
        const days = Math.floor(interval);
        return `${days}d`;
    }

    interval = seconds / 3600;

    if (interval > 1) {
        const hours = Math.floor(interval);
        return `${hours}h`;
    }

    interval = seconds / 60;

    if (interval > 1) {
        const minutes = Math.floor(interval);
        return `${minutes}min`;
    }

    seconds = Math.floor(seconds);  
        return `${seconds}s`;
}

module.exports = getTimeSince;