问题Node.js 由这些关键字组成：事件驱动、非阻塞I/O、高效、轻量。于是在我们刚接触 Node.js 时，会有所疑问：为什么在浏览器中运行的 JavaScript 能与操作系统进行如此底层的交互？Node 真的是单线程吗？如果是单线程，他是如何处理高并发请求的？Node 事件驱动是如何实现的？下来我们一起来解秘这是怎么一回事！架构一览上面的问题，都挺底层的，所以我们从 Node.js 本....

问答 2020-06-09 来自：开发者社区

js循环异步ajax请求服务器，只有返回后计数，并发返回怎么办? 400 报错

js循环异步ajax请求服务器，只有返回后计数，并发返回怎么办? 400 报错 js循环异步ajax请求服务器，只有返回后计数，并发返回怎么办？我在form设置一个隐藏值作为计数，但是ajax请求是异步的，有机会是并发的操作，返回的值是并发返回，是有可能修改隐藏值存在并发？怎么解决并发修改计数值问题

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更新时间 2024-05-03 13:03:02

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