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"use strict";
var schedule;
var util = require("./util");
var noAsyncScheduler = function() {
throw new Error("No async scheduler available\u000a\u000a See http://goo.gl/m3OTXk\u000a");
};
if (util.isNode && typeof MutationObserver === "undefined") {
var GlobalSetImmediate = global.setImmediate;
var ProcessNextTick = process.nextTick;
schedule = util.isRecentNode
? function(fn) { GlobalSetImmediate.call(global, fn); }
: function(fn) { ProcessNextTick.call(process, fn); };
} else if (typeof MutationObserver !== "undefined") {
schedule = function(fn) {
var div = document.createElement("div");
var observer = new MutationObserver(fn);
observer.observe(div, {attributes: true});
return function() { div.classList.toggle("foo"); };
};
schedule.isStatic = true;
} else if (typeof setImmediate !== "undefined") {
schedule = function (fn) {
setImmediate(fn);
};
} else if (typeof setTimeout !== "undefined") {
schedule = function (fn) {
setTimeout(fn, 0);
};
} else {
schedule = noAsyncScheduler;
}
module.exports = schedule;
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