blocks|key|4403916|text|web浏览器和nodejs都运行javascript脚本。主要区别在于NodeJS是一个服务器端框架，它在服务器中执行javascript代码，而不是在web浏览器(客户端)的环境中执行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4403917|没有像nodejs文件这样的概念。只有javascriprt脚本可以在客户端(在web浏览器中内置的JavaScript引擎的帮助下，就像chrome的V8+)或者在服务器上(在这种情况下是NodeJS的帮助)上运行。顺便说一下，如果我没记错的话，NodeJS使用的JavaScript引擎是V8，也就是谷歌的JavaScript引擎。)|4403918|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Both web browsers and nodejs run javascript scripts. The main difference is that NodeJS is a server side framework, and executes javascript code in a server and not in the environment of a web browser (client side).

There isn't any concept like nodejs file. There are only javascriprt scripts that can be run on client (by the help of the JavaScript engine that is built in a web browser, like V8 for chrome) or in the server (by the help in this case of NodeJS. By the way, if I am not wrong the JavaScript engine that NodeJS uses is the V8, google's JavaScript engine.)

blocks|key|4404080|text|JavaScript是一种语言。node.js不是一种语言，而是一个运行普通JavaScript的“环境/软件集”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4404081|所有的浏览器都有运行网页JavaScript的JavaScript引擎(火狐的Spidermonkey，Chrome的V8+)。|4404082|Node.js只是与一些库捆绑在一起的V8引擎，用于执行I/O和联网操作，因此您可以在浏览器之外使用JavaScript+(例如，创建后端服务)。|4404083|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

JavaScript is a language. node.js is not a language but an &quot;environement/set of software&quot; that runs normal JavaScript.
All browsers have JavaScript engines that run the JavaScript of web pages (Spidermonkey for Firefox, V8 for Chrome).
Node.js is simply the V8 engine bundled with some libraries to do I/O and networking, so that you can use JavaScript outside of the browser (e.g, to create backend services).

blocks|key|4404149|text|我认为当空气中有混乱时，具体的例子比概念性的解释更有效。所以，以这个例子为例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4404150|您有一个名为"hello.js“的Node.js脚本(当然是在JavaScript中)，它只打印"Hello+World!”在控制台中并退出。您可以通过键入node+hello.js来运行此脚本。它将只打印消息并退出。|offset|length|style|CODE|4404151|您有另一个名为"server.js“的Node.js脚本，它实现了一个在端口3000上侦听的HTTP服务器(也称为web服务器)。此服务器提供一个名为"+static“的目录中的静态文件。该文件夹中有两个文件："index.html“和"app.js”。这些是网站的文件(当然，app.js是用JavaScript编写的)。您可以通过键入node+server.js来运行此脚本。它将启动HTTP服务器并开始等待客户端请求。|4404152|当超文本传输协议服务器脚本运行时，您访问"http://localhost:3000“来访问您在上面启动的web服务器。服务器知道如何提供静态文件，并且知道默认情况下它应该提供index.html。您的浏览器加载index.html，处理它，并理解它也应该返回并请求app.js文件(因为index.html中的<script>标记)。当浏览器加载app.js时，浏览器会运行它。Node.js服务器除了将其作为另一个静态文件提供服务外，什么都不关心。|4404153|entityMap|0|LINK|mutability|MUTABLE|url|http://localhost:3000/^0|0|26|D|0|4P|E|0|4C|8|L|L|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@$D|V|E|W|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@$D|13|E|14|1|15]]|A|$]]|$1|L|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]]]

I think concrete examples work better than conceptual explanations when there's confusion in the air. So, take this example:

You have a Node.js script called "hello.js" (in JavaScript, of course) that just prints "Hello World!" in the console and exits. You can run this script by typing <code>node hello.js</code>. It will just print the message and exit.

You have another Node.js script called "server.js" that implements an HTTP server (aka web server) that listens on port 3000. This server serves static files from a directory called "static". There are two files in this folder: "index.html" and "app.js". These are files for a web site (and app.js is in JavaScript, of course). You run this script by typing <code>node server.js</code>. It will spin up the HTTP server and start waiting for client requests.

While the HTTP server script is running, you visit "<a href="http://localhost:3000" rel="noreferrer">http://localhost:3000</a>" to hit the very web server that you started above. The server knows how to serve off static files and knows that it should serve index.html by default. Your browser loads index.html, processes it and understands that it should also go back and request the app.js file (because of the <code>&lt;script&gt;</code> tag in index.html). When app.js is loaded by the browser, the browser runs it. The Node.js server doesn't care about anything but serving it as just another static file.

If JavaScript files are loaded and executed in the browser how does the server know when the file is a node js file, therefore to execute on the server?

newbie: JavaScript VS Node JS

服务器

如果在浏览器中加载并执行JavaScript文件，服务器如何知道该文件何时是节点js文件，从而在服务器上执行？

问新手: JavaScript VS Node
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