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Promise到底解决了什么问题？
source link: https://juejin.im/post/5b45bea65188251b1c3ce1ec
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我的github博客 github.com/zhuanyongxi… 大家都知道Promise解决了回调地狱的问题。说到回调地狱，很容易想到下面这个容易让人产生误解的图片： 可回调地狱到底是什么？它到底哪里有问题？是因为嵌套不好看还是读起来不方便？ 首先我们
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