倒计时计时器:无法设置null的属性“”textContent“”

// 设置倒计时的目标时间
const targetTime = new Date("2022-01-01 00:00:00").getTime();

// 每秒更新倒计时显示
setInterval(() => {
  // 获取当前时间
  const currentTime = new Date().getTime();

  // 计算剩余时间
  const remainingTime = targetTime - currentTime;

  // 将剩余时间转换为天、小时、分钟、秒
  const days = Math.floor(remainingTime / (1000 * 60 * 60 * 24));
  const hours = Math.floor((remainingTime % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
  const minutes = Math.floor((remainingTime % (1000 * 60 * 60)) / (1000 * 60));
  const seconds = Math.floor((remainingTime % (1000 * 60)) / 1000);

  // 更新倒计时显示
  const countdownElement = document.getElementById("countdown");
  countdownElement.textContent = `${days}天 ${hours}小时 ${minutes}分钟 ${seconds}秒`;
}, 1000);