基于ES6 Promise的中止过程功能尝试

es-promise-test.160519.js

let failingStep = function () {
  console.log('向失败前进……');
  return new Promise((resolve, reject) => {
    setTimeout(reject, 1000, '计划内的失败');
  });
};
let catchStep = function (reason) {
  console.log(`遇到了错误：${reason}`);
  return new Promise(() => {});
};
let followingStep = function () {
  console.log('这个步骤不应当被执行');
};

failingStep().catch(catchStep).then(followingStep);

/*
 * 运行结果
 *
 * 向失败前进……             - 0s
 * 遇到了错误：计划内的失败 - 1s
 */