(function(global, factory) {

    if (typeof module === "object" && typeof module.exports === "object") {

        // For CommonJS and CommonJS-like environments where a proper `window`

        // is present, execute the factory and get avalon.

        // For environments that do not have a `window` with a `document`

        // (such as Node.js), expose a factory as module.exports.

        // This accentuates the need for the creation of a real `window`.

        // e.g. var avalon = require("avalon")(window);

        module.exports = global.document ? factory(global, true) : function(w) {

            if (!w.document) {

                throw new Error("Avalon requires a window with a document")

            }

            return factory(w)

        }

    } else {

        factory(global)

    }

}(typeof window != 'undefined' ? window : this, function(window, noGlobal) {

    var avalon = {}

    if (typeof define === "function" && define.amd) {

        define("avalon", [], function() {

            return avalon

        })

    }

// Expose avalon identifiers, even in AMD

// and CommonJS for browser emulators

    if (noGlobal === void 0) {

        window.avalon = avalon

    }

    return avalon

}))