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这样你都不懂Promise,算我输！

 5 years ago
source link: https://juejin.im/post/5b5491856fb9a04fa8672cad
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一、Promise的身世 1、Promise历史 Promise 是异步编程的一种解决方案，比我们传统的回调函数、事件更加合理，最早由社区提出并实现，ES6觉得很ok，就写进了语言标准中，统一了语法，并且提供了原生的Promise对象。 所谓的Promise，

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