/**
 * The MIT License (MIT)
 * 
 * Copyright (c) 2014 Petka Antonov
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:</p>
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */
"use strict";
var schedule;
var _MutationObserver;
if (typeof process === "object" && typeof process.version === "string") {
    schedule = function (fn) {
        process.nextTick(fn);
    };
}
else if ((typeof MutationObserver !== "undefined" &&
         (_MutationObserver = MutationObserver)) ||
         (typeof WebKitMutationObserver !== "undefined" &&
         (_MutationObserver = WebKitMutationObserver))) {
    schedule = (function() {
        var div = document.createElement("div");
        var queuedFn;
        var observer = new _MutationObserver(function() {
            var fn = queuedFn;
            queuedFn = undefined;
            fn();
        });
        observer.observe(div, {
            attributes: true
        });
        return function(fn) {
            queuedFn = fn;
            div.classList.toggle("foo");
        };

    })();
}
else if (typeof setTimeout !== "undefined") {
    schedule = function (fn) {
        setTimeout(fn, 0);
    };
}
else throw new Error("no async scheduler available");
module.exports = schedule;
