including js files with html and node.js

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I am performing messaging via websockets between a HTML5 client and server running on node.js. Naturally I chose JSON as the message format and as such created common javascript

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孤街浪徒

2021-02-14 08:06

Take a look at nodeJS modules.

Would be in comm.js:

module.exports = function(/* any dependency? */){
   // things
   // you can return some object
}

In the files you need comm.js

require('./common/js/comm.js')();
// or you can assign it to a variable if it returned something

Hope that helps!

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醉梦人生

2021-02-14 08:22
Have you researched how Node modules work? If you're developing using this pattern, it's fairly simple to use require('./common/js/comms') on the server while still including it on your client as well.

This article should point you in the right direction: https://caolan.org/posts/writing_for_node_and_the_browser.html

The following is the code that Tyler linked to in his comments below.

The example (example.js):
```
if(typeof exports == "undefined"){
    exports = this;
}

Example = function() {
    this.init();
};

Example.prototype = {
    init: function() {
         console.log('hello world');
    }
};

exports.Example = new Example();
```
The node.js usage of example.js (app.js):
```
example = require('./example');
```
The html usage of example.js (index.html):
```
<html>
    <head>
        <title></title>
    </head>
    <body>
        <script src="./example.js"></script>
    </body>
```
The change by the OP was to assign exports.Example to Example instead of to an new instance. Thus the node.js logic can use the following:
```
var Example = require('./example.js').Example;
var foo = new Example();
```
Thus the original question is solved.
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