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手撸 Promise - - SegmentFault 思否
source link: https://segmentfault.com/a/1190000020872602
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手撸 Promise Promise作为ES6的核心内容，是前端童鞋必备的基础知识！更是面试通关的必刷题！ Promise的出现，解决了"蛮荒时代"的回调地狱，让js异步callback走向简洁，优雅！ 本文参照Promise/A+实现（不足之处，请留言指出） 第一版（初出茅庐） 状态 Promise有三种状态值标识当前的异步状态！ pending状态可变为fulfi...
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