hooks countdownWorker.js

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  self.onmessage = (event) => {
  const { duration } = event.data;
  let remainingTime = duration;
 
  const intervalId = setInterval(() => {
    remainingTime -= 1;
 
    postMessage(remainingTime);
 
    if (remainingTime <= 0) {
      clearInterval(intervalId);
      postMessage(0);
    }
  }, 1000);
};