Common module in node.js and browser javascript

Question

I am developing a node.js app, and I want to use a module I am creating for the node.js server also on the client side.

An example module would be circle.js:

var PI = Math.PI;  exports.area = function (r) {   return PI * r * r; };  exports.circumference = function (r) {   return 2 * PI * r; }; 

and you do a simple

var circle = require('./circle') 

to use it in node.

How could I use that same file in the web directory for my client side javascript?

Answer 1

This seems to be how to make a module something you can use on the client side.

https://caolan.org/posts/writing_for_node_and_the_browser.html

mymodule.js:

(function(exports){      // your code goes here     exports.test = function(){         return 'hello world'     };  })(typeof exports === 'undefined'? this['mymodule']={}: exports); 

And then to use the module on the client:

<script src="mymodule.js"></script> <script>     alert(mymodule.test()); </script> 

This code would work in node:

var mymodule = require('./mymodule'); 

Answer 2

Browserify

It magically lets you do that.