Question

让 Promise 顺序的执行，并支持初始化参数和结果作为参数传递。

代码

function runPromises(promiseCreators, initData) {
  return promiseCreators
    .reduce((promise, next) => promise
        .then((data) => next(data))
      , Promise.resolve(initData));
}

示例

var promise1 = function (data = 0) {
  return new Promise(resolve => {
    resolve(data + 1000);
  });
}
var promise2 = function (data) {
  return new Promise(resolve => {
    resolve(data -500);
  });
}

runPromises([promise1, promise2], 1).then(res=>console.log(res));