深入学习 Promise 的朋友应该都看过这一系列的文章, 以解除回调地狱之外的观点来剖析 Promise 更多的内涵, 确实十分精彩. Part 1: The Sync Problem(译文: http://segmentfault.com/blog/kk_470661/1190000000586666) Part 2: The Inversion Problem(译文: http://segmentfault.com/blog/kk_470661/1190000000591382) Part 3: The Trust Problem(译文: http://segmentfault.com/blog/kk_470661/1190000000593885) Part 4: The Extension Problem(译文: http://segmentfault.com/blog/kk_470661/1190000000600268) Part 5: The LEGO Problem(译文: http://segmentfault.com/blog/kk_470661/1190000000611040) NPO(Native Promise Only) 是原文作者 polyfill 的 ES6 Promise, 本文为拜读文章及源码后的笔记, 以便日后查阅. NPO@github