事件循环JavaScript 的相关内容

文章 2025-03-14 来自：开发者社区

最细最有条理解析：事件循环（消息循环）是什么？为什么JS需要异步

事件循环（消息循环）：引入事件循环是浏览器的核心内容。与计时器、Promise、ajax、node等技术有关。要想说清楚事件循环，必须先聊进程与线程。 ...

文章 2024-01-16 来自：开发者社区

闭包，事件循环以及js校验规则

什么是闭包闭包是指函数以及其相关的引用环境组合而成的实体。简单来说，闭包是一个函数和其周围的状态（词法环境）的集合体。要形成闭包，通常需要满足以下两个条件：1.在一个函数内部定义了另一个函数。2.内部函数引用了外部函数的变量。js实现闭包代码如下：function outerFunction() { var x = 10; function innerFunction() { c...

文章 2023-08-21 来自：开发者社区

浏览器中的事件循环和Node.js中事件循环的区别(经典面试题)

前言众所周知，JavaScript是单线程执行的，指的是一个进程里只有一个主线程。JavaScript中的进程有：一个浏览器主进程、一个GPU进程、一个网络进程、多个渲染进程和插件进程。 JavaScript中的线程有：GUI渲染线程、JS引擎线程、计时器线程、异步HTTP请求线程、事件触发线程。node事件循环timer定时器阶段：执行如setTimeout和setInterval等的回调函数....

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更新时间 2025-03-15 15:14:58

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