xd.js

(function() {
    'use strict';

    var cacheBust = 0,
        hashInterval,
        lastHash;

    this.xd = {
        postMessage: function(message, targetOrigin, otherWindow) {
            if (!targetOrigin)
                return;

            otherWindow = otherWindow || window.parent;

            if (window.postMessage) {
                otherWindow.postMessage(message, targetOrigin.replace(/([^:]+:\/\/[^\/]+).*/, '$1'));
            } else {
                var hash = '#' + (+new Date()) + (cacheBust++) + '&' + message;
                otherWindow.location = targetOrigin.replace(/#.*$/, '') + hash;
            }
        },
        onMessage: function(callback, origin) {
            if (window.postMessage) {
                if (window.addEventListener)
                    window[callback ? 'addEventListener' : 'removeEventListener']('message', callback);
                else
                    window[callback ? 'attachEvent' : 'detachEvent']('onmessage', callback);
            } else {
                if (!callback && hashInterval) {
                    clearInterval(hashInterval);
                    hashInterval = null;
                }

                var hashRe = /^#?\d+&/;

                if (callback) {
                    hashInterval = setInterval(function() {
                        var hash = document.location.hash;

                        if (hash != lastHash && hashRe.test(hash)) {
                            lastHash = hash;
                            callback({
                                data: hashRe.replace(hash, '')
                            });
                        }
                    }, 100);
                }
            }
         }
    };
}).call(this);

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