使用Promise顺序执行操作

function asyncOperation1() {
  return new Promise((resolve, reject) => {
    // 执行异步操作
    setTimeout(() => {
      console.log('Async operation 1 completed');
      resolve('Result 1');
    }, 1000);
  });
}

function asyncOperation2(result1) {
  return new Promise((resolve, reject) => {
    // 执行异步操作
    setTimeout(() => {
      console.log('Async operation 2 completed');
      resolve('Result 2');
    }, 1000);
  });
}

function asyncOperation3(result2) {
  return new Promise((resolve, reject) => {
    // 执行异步操作
    setTimeout(() => {
      console.log('Async operation 3 completed');
      resolve('Result 3');
    }, 1000);
  });
}

asyncOperation1()
  .then(result1 => asyncOperation2(result1))
  .then(result2 => asyncOperation3(result2))
  .then(result3 => {
    console.log('All operations completed');
    console.log('Final result:', result3);
  })
  .catch(error => {
    console.error('An error occurred:', error);
  });