一个关于连续回调的面试题

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网上一个比较有意思的前端面试题：

看了很多网友的思路，总结和分析了一下，有些比较好理解有些也比较难理解：
http://www.qiutianaimeili.com/html/page/2019/03/8rfqp1yeul5.html

3 replies • 2019-03-21 12:03:37 +08:00

disflyer

Mar 21, 2019

let resolve = Promise.resolve()
arr.map((el) => {
resolve = resolve.then(() => {
return new Promise(el)
})
})

qiutianaimeili

Mar 21, 2019

@disflyer 好思路

akatquas

Mar 21, 2019 via iPhone

构建 promise 队列，方法很多