如何在Node.js，ExpressJS中使用外部JS文件 [英] How to use an external js-File in Nodejs, ExpressJS

问题描述

我今天开始使用NodeJS，ExpressJS，Android创建一个小的Web应用程序.而且我遇到了一个问题，它整日困扰着我！

I started today with NodeJS, ExpressJS, Android, to create a little Webapplication. And I faced a problem an it holds me the whole day!

ENV:

服务器:NodeJS，ExpressJS

客户端:HTML，Angular，CSS

我尝试从node_modules文件夹加载CSS和JavaScript文件.但这是行不通的.它仅适用于在线资源

I try to load the CSS and the JavaScript file from the node_modules folder. But it doesn't work. It works just with the online sources

有效

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
  <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
  <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>
  <script type="text/javascript" src="../public/javascript/test.js"></script>

不起作用

<script type="text/javascript" src="../public/javascript/test.js"></script>

服务器始终写入404错误

The server write all the time a 404 Error

我已经尝试过绝对和相对路径. 我也尝试过其他stackoverflow帖子中的服务器建议.没有结果.

I've tried with absolut and relativ path. I've tried also with serveral sugesstions from other stackoverflow posts. without a result.

服务器代码是由Eclipse IDE使用"Express JS Project"创建的.

The Servercode was created by Eclipse IDE with 'Express JS Project'

app.js

    var express = require('express')
  , routes = require('./routes')
  , user = require('./routes/user')
  , http = require('http')
  , path = require('path')

    ,pageX = require('./routes/pageX');

var app = express();

// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));

// development only
if ('development' == app.get('env')) {
  app.use(express.errorHandler());
}

app.get('/', routes.index);
app.get('/pageX', function(req,res){
    console.log("TEST - PageX");
    res.send(pageX.pageX(req, res));
});
app.get('/users', user.list);

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});

迈克尔

推荐答案

根据 docs (使用此功能时):

According to the docs, when using this:

app.use(express.static(path.join(__dirname, 'public')));

Express查找相对于静态目录的文件，因此静态目录的名称不是URL的一部分.

Express looks up the files relative to the static directory, so the name of the static directory is not part of the URL.

因此，要加载test.js，您应该使用:

So, to load your test.js you should use:

<script type="text/javascript" src="/javascript/test.js"></script>

此外，这意味着您应该在__dirname下具有一个public目录.

Also, it means that you should have a public directory under __dirname.

如果我正确地理解了您，并且按照您到目前为止说过的话，您正在node_modules内部运行node，并且您具有以下目录结构:

If I understood you correctly and from what you said you've tried so far, you are running node from inside the node_modules and you have the following directory structure:

app-root-directory/
    public/
    node_modules/

我对节点也很陌生，我相信您不应该从node_modules内部运行.但是，如果您不是path.join(__dirname, 'public')，那么它不是您想要的，因为它将指向node_modules中的public.

I'm quite new to node as well and I believe you're not supposed to be running from inside node_modules. But if you are then path.join(__dirname, 'public') is not what you want as it will point to public inside node_modules.

因此，您还必须将express.static的根目录更改为../public:

So you also have to change the root directory of express.static to ../public:

app.use(express.static(path.join(__dirname, '../public')));

这篇关于如何在Node.js，ExpressJS中使用外部JS文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！