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还不错，像我这样总是对Promise一知半解的人算是一个很大的帮助。

working with promise这一节很有启发

开年第一本好书。对 Promise 及延伸的种种你能想到的各种知识都有一个很清晰的介绍，可以说是市面上介绍 Promise 最好的一本书了。比较遗憾的是 Promise.race 详细的使用场景 与 Promise 的穿透好像没讲到，如果能再加一些 async 的知识可以值 6星了。

对promise的介绍

对promise的介绍

引用书中的一段话，让你彻底理解Promise. =========================================================== "A promise is an object that serves as a placeholder for a value. That value is usually the result of an async operation such as an HTTP request or reading a...

引用书中的一段话，让你彻底理解Promise. =========================================================== "A promise is an object that serves as a placeholder for a value. That value is usually the result of an async operation such as an HTTP request or reading a...

引用书中的一段话，让你彻底理解Promise. =========================================================== "A promise is an object that serves as a placeholder for a value. That value is usually the result of an async operation such as an HTTP request or reading a...

引用书中的一段话，让你彻底理解Promise. =========================================================== "A promise is an object that serves as a placeholder for a value. That value is usually the result of an async operation such as an HTTP request or reading a...

引用书中的一段话，让你彻底理解Promise. =========================================================== "A promise is an object that serves as a placeholder for a value. That value is usually the result of an async operation such as an HTTP request or reading a...