在我的JavaScript HTML源代码中执行Node.js代码
[英]Executing nodejs code in my javascript html source
问题描述
I use express to send a html file to incoming GET requests: 
我使用express将html文件发送到传入的GET请求：
app.get('/', function(req, res) {
res.sendFile(path.join(__dirname + '/public/index.html'));
});
In that html file I declared(not sure which word to use here) another javascript file, script.js. 在该html文件中，我声明了另一个javascript文件（script.js）（不确定在此处使用哪个词）。 via 通过
<script src="script.js"></script> in the <head> <script src="script.js"></script> <head>中的<script src="script.js"></script> <head>
Is it possible to access nodejs functions like require() in this script.js? 是否可以在此script.js中访问诸如require()类的nodejs函数？
If it is, what am I doing wrong/ what do I have to include to be able to use it? 如果是，我在做什么错/要使用它必须包括哪些内容？
1 个解决方案
解决方案1
0 已采纳 2016-12-02 02:45:05
Your script.js file runs in the browser and only has access to the features that a browser JS environment has. 您的script.js文件在浏览器中运行，并且只能访问浏览器JS环境具有的功能。 Since there's no built-in require() in a browser, you can't directly use require() in script.js and the same is true for other node.js functionality that is not built into a browser environment. 由于浏览器中没有内置的require() ，因此您无法在script.js直接使用require() ，并且对于未内置于浏览器环境中的其他node.js功能也是如此。
If you need access to something that can only be done on the server (like accessing a server side database), then you can create a route on your server and use an Ajax call from script.js to send a request to that route and get a response. 如果您需要访问只能在服务器上完成的操作（例如访问服务器端数据库），则可以在服务器上创建路由，并使用来自script.js的Ajax调用向该路由发送请求并获取一个答复。
For require() specifically, there are some third party libraries (not part of node.js or built into the browser) that allow you to get require-like functionality in a browser, but that's a special case. 具体来说，对于require() ，有一些第三方库（不是node.js的一部分或内置于浏览器中），使您可以在浏览器中获得类似需求的功能，但这是特例。 Other node.js functionality like fs.readFile() is simply beyond the capabilities of a browser environment. 其他node.js功能（例如fs.readFile()完全超出了浏览器环境的功能。
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