My version of the UMD pattern. https://github.com/umdjs/umd

umd.js

    if (typeof define !== 'function') {
        // Not AMD
        if (typeof require === 'function') {
            // Node.js
            var define = function (body) {
                module.exports = body(require);
            };
        } else {
            // Vanilla browser
            var define = function (body) {
                window[body.name] = body(function (id) { return window[id] });
            };
        }
    }
    define(function moduleId(require) {
        var import1 = require('import1');
        var import2 = require('import2');
        
        function export1() {
            ...
        }
        function export2() {
            ...
        }
        function modulePrivate() {
            ...
        }        
        return {
            export1: export1,
            export2: export2
        };
    });

Pattern can be pruned if you don’t have any imports or if you don’t want to support vanilla browsers.