import DuckTimer from 'duck-timer';
const timer = new DuckTimer({ interval: 100 }); // interval time: 100ms = 0.1sec.

// start.
timer.onInterval(res => {
  console.log(res.seconds);
}).start();

// stop.
timer.stop();

// reset.
timer.reset();

import DuckTimer from 'duck-timer';
const timer = new DuckTimer({ interval: 1000 });

timer.setCountdown(`Dec 25, ${new Date().getFullYear()}`)
  .onInterval(res => console.log(res.remain.seconds))
  .onTimeout(() => console.log('Merry Christmas!!!'))
  .start();