TimeAgo总是显示为“刚才”

exports.main = async (event, context) => {
  const targetTime = new Date(event.targetTime);
  const currentTime = new Date();
  const timeDiff = currentTime - targetTime;

  if (timeDiff < 60000) {
    return "刚才";
  } else if (timeDiff < 3600000) {
    return Math.floor(timeDiff / 60000) + "分钟前";
  } else if (timeDiff < 86400000) {
    return Math.floor(timeDiff / 3600000) + "小时前";
  } else if (timeDiff < 172800000) {
    return "昨天";
  } else {
    return Math.floor(timeDiff / 86400000) + "天前";
  }
};