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深入理解 Promise 之手把手教你写一版
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深入理解 Promise 之手把手教你写一版
Promise 是 JS 异步编程中的重要概念，是目前比较流行 Javascript 异步编程解决方案之一。本文基于 Promise A+ 规范模拟 Promise，不保证与浏览器实现完全一致。
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