从JS Promise计算价值

// 创建一个Promise
const promise = new Promise((resolve, reject) => {
  setTimeout(() => {
    const randomNumber = Math.random();
    if (randomNumber > 0.5) {
      resolve('成功：' + randomNumber);
    } else {
      reject('失败：' + randomNumber);
    }
  }, 1000);
});

// 使用then和catch处理Promise
promise
  .then(result => {
    console.log(result);
  })
  .catch(error => {
    console.error(error);
  });

promise
  .then(result => {
    console.log(result);
    return someAsyncOperation();
  })
  .then(anotherResult => {
    console.log(anotherResult);
  })
  .catch(error => {
    console.error('捕获到错误：', error);
  });

const promises = [promise1, promise2, promise3];

Promise.allSettled(promises)
  .then(results => {
    results.forEach(result => {
      if (result.status === 'fulfilled') {
        console.log('成功：', result.value);
      } else {
        console.error('失败：', result.reason);
      }
    });
  });