Calculate the time difference

// deadline：string  Closing date 
//  Calculate how long it will be between now and the deadline 
// return：string x God x Hours x branch x second 
const computeRemainTime = deadlineTime => {
    
    let r = '';
    //  How many milliseconds is the difference between the deadline and the current time 
    let seconds = new Date(deadlineTime).getTime() - new Date().getTime();
    //  return int 
    const day = Math.floor(seconds / (24 * 3600 * 1000));
    r += day ? day + ' God ' : '';
    //  Remove the milliseconds of the number of days 
    seconds = seconds % (24 * 3600 * 1000);
    //  A few hours left 
    const hour = Math.floor(seconds / (3600 * 1000));
    r += hour ? hour + ' Hours ' : '';
    //  Remove the milliseconds of the hour 
    seconds = seconds % (3600 * 1000);
    //  A few minutes left 
    const minute = Math.floor(seconds / (60 * 1000));
    r += minute ? minute + ' branch ' : '';
    //  A few seconds left 
    seconds = seconds % (60 * 1000);
    //  Remove the milliseconds in minutes 
    const second = Math.round(seconds / 1000);
    r += second ? second + ' second ' : '';
    return r;
}