计算两个时间点的时间差

diff-time.js

function diffTime(time1) {
  return function(time2) {
    let seconds = Math.abs(time1 - time2) / 1000;
    const days = Math.floor(seconds / (3600 * 24));
    seconds = seconds - days * 3600 * 24;

    const hours = Math.floor(seconds / 3600);
    seconds = seconds - hours * 3600;

    const minutes = Math.floor(seconds / 60);
    seconds = seconds - minutes * 60;

    return {
      days,
      hours,
      minutes,
      seconds: parseInt(seconds)
    };
  };
}

diffTime(new Date('2016-01-01'))(new Date('2017-01-01'))
// Object {days: 366, hours: 0, minutes: 0, seconds: 0}