JavaScript Engine和JavaScript Runtime Environment之间有什么区别 [英] What is the difference between JavaScript Engine and JavaScript Runtime Environment

问题描述

我感到有点困惑，有人可以帮忙描述JavaScript Engine和JavaScript Runtime Environment之间的区别。
BTW，事件循环是在引擎还是运行时实现的？

I'm feeling a bit confused, could someone help to describe What is the difference between JavaScript Engine and JavaScript Runtime Environment. BTW, Event Loop was implemented in Engine or Runtime?

推荐答案

与C和其他编译语言不同，Javascript运行于容器 - 读取js代码并运行它们的程序。这个程序必须做两件事

Unlike C and other compiled languages, Javascript runs in a container - a program that reads your js codes and runs them. This program must do two things

• 解析你的代码并将其转换为runnable命令


• 提供一些javascript的对象，以便它可以与外部世界进行交互。

第一部分称为Engine，第二部分是Runtime。

The first part is called Engine and the second is Runtime.

例如，Chrome浏览器和node.js使用相同的引擎 - V8，但它们的运行时不同：在Chrome中你有窗口，DOM对象等，而节点给你 require ，缓冲区和进程。

For example, the Chrome Browser and node.js use the same Engine - V8, but their Runtimes are different: in Chrome you have the window, DOM objects etc, while node gives you require, Buffers and processes.

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