Multi-environment module pattern

gistfile1.js

// function will execute immediately
(function(root, factory) {
    if (typeof exports === 'object') {
        // commonjs
        module.exports = factory(
            // pass dependencies via require
        );
    } else if (typeof define === 'function' && define.amd) {
        // amd
        define([
            // dependencies go here
        ], factory);
    } else {
        // browser
        // expose variable as property of window
        root.foo = factory(
            // pass dependencies here
            // Dependencies should have already been included via script tags and exposed as properties of window
        );
    }
})
(this, function() {
    // module code goes here
    // any dependencies should be passed in as arguments
    // return the symbol to expose
    return;
});