在不使用async/await的情况下按顺序执行promises数组

function executePromisesInOrder(promises) {
  return promises.reduce((chain, promise) => {
    return chain.then(result => promise.then(res => res));
  }, Promise.resolve());
}

// 示例使用
const promiseFunctions = [
  () => new Promise((resolve) => setTimeout(() => resolve('First'), 1000)),
  () => new Promise((resolve) => setTimeout(() => resolve('Second'), 500)),
  () => new Promise((resolve) => setTimeout(() => resolve('Third'), 200))
];

executePromisesInOrder(promiseFunctions.map(fn => fn())).then(console.log);