diff --git a/dist/dom.d.ts b/dist/dom.d.ts
index bc4404d..d3011f3 100644
--- a/dist/dom.d.ts
+++ b/dist/dom.d.ts
@@ -28,14 +28,14 @@ export interface IDom {
     * @param callback The function that receives a notification when an event of the specified type occurs.
     * @param capture If true, useCapture indicates that the user wishes to initiate capture.
     */
-    addEventListener(eventName: string, callback: EventListener, capture: boolean): void;
+    addEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture: boolean): void;
     /**
     * Remove an event listener from the document.
     * @param eventName A string representing the event type to listen for.
     * @param callback The function to remove from the event.
     * @param capture Specifies whether the listener to be removed was registered as a capturing listener or not.
     */
-    removeEventListener(eventName: string, callback: EventListener, capture: boolean): void;
+    removeEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture: boolean): void;
     /**
     * Adopts a node from an external document.
     * @param node The node to be adopted.
@@ -47,7 +47,8 @@ export interface IDom {
     * @param tagName A string that specifies the type of element to be created.
     * @return The created element.
     */
-    createElement(tagName: string): Element;
+    createElement<T extends keyof HTMLElementTagNameMap>(tagName: T): HTMLElementTagNameMap[T];
+    createElement(tagName: string): HTMLElement;
     /**
     * Creates the specified HTML attribute
     * @param name A string that specifies the name of attribute to be created.
@@ -102,11 +103,17 @@ export interface IDom {
     */
     getElementById(id: string): Element;
     /**
+    * Performs a query selector on the document and returns first matched element, depth first.
+    * @param query The query to use in searching the document.
+    * @return A list of all matched elements in the document.
+    */
+    querySelector<E extends Element = Element>(selectors: string): E | null;
+    /**
     * Performs a query selector on the document and returns all located matches.
     * @param query The query to use in searching the document.
     * @return A list of all matched elements in the document.
     */
-    querySelectorAll(query: string): NodeList;
+    querySelectorAll<E extends Element = Element>(selectors: string): NodeListOf<E>;
     /**
     * Gets the element that is the next sibling of the provided element.
     * @param element The element whose next sibling is being located.
@@ -118,7 +125,7 @@ export interface IDom {
     * @param markup A string containing the markup to turn into a template. Note: This string must contain the template element as well.
     * @return The instance of HTMLTemplateElement that was created from the provided markup.
     */
-    createTemplateFromMarkup(markup: string): Element;
+    createTemplateFromMarkup(markup: string): HTMLTemplateElement;
     /**
     * Appends a node to the parent, if provided, or the document.body otherwise.
     * @param newNode The node to append.
diff --git a/dist/index.js.map b/dist/index.js.map
index 3a52f88..09cb05c 100644
--- a/dist/index.js.map
+++ b/dist/index.js.map
@@ -1 +1 @@
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<reference path=\"./nodejs-global.ts\" />\n\nimport { initializePAL, DOM, PLATFORM, FEATURE, isInitialized } from 'aurelia-pal';\nimport { buildPal } from './nodejs-pal-builder';\nimport { MutationNotifier } from './polyfills/mutation-observer';\n\n/**\n* Initializes the PAL with the NodeJS-targeted implementation.\n*/\nexport function initialize(): void {\n  if (isInitialized) {\n    return;\n  }\n\n  let pal = buildPal();\n\n  initializePAL((platform, feature, dom) => {\n    Object.assign(platform, pal.platform);\n    Object.setPrototypeOf(platform, pal.platform.constructor.prototype);\n\n    Object.assign(dom, pal.dom);\n    Object.setPrototypeOf(dom, pal.dom.constructor.prototype);\n\n    Object.assign(feature, pal.feature);\n    Object.setPrototypeOf(feature, pal.feature.constructor.prototype);\n\n    (function (global) {\n      global.console = global.console || {};\n      let con = global.console;\n      let prop;\n      let method;\n      let empty = {};\n      let dummy = function () { };\n      let properties = 'memory'.split(',');\n      let methods = ('assert,clear,count,debug,dir,dirxml,error,exception,group,' +\n        'groupCollapsed,groupEnd,info,log,markTimeline,profile,profiles,profileEnd,' +\n        'show,table,time,timeEnd,timeline,timelineEnd,timeStamp,trace,warn').split(',');\n      while (prop = properties.pop()) if (!con[prop]) con[prop] = empty;\n      while (method = methods.pop()) if (!con[method]) con[method] = dummy;\n    })(platform.global);\n\n    if (platform.global.console && typeof console.log === 'object') {\n      if (typeof console['debug'] === 'undefined') {\n        console['debug'] = this.bind(console['log'], console);\n      }\n      ['log', 'info', 'warn', 'error', 'assert', 'dir', 'clear', 'profile', 'profileEnd'].forEach(function (method) {\n        console[method] = this.bind(console[method], console);\n      }, Function.prototype.call);\n    }\n\n    Object.defineProperty(dom, 'title', {\n      get: function () {\n        return pal.global.document.title;\n      },\n      set: function (value) {\n        pal.global.document.title = value;\n      }\n    });\n\n    Object.defineProperty(dom, 'activeElement', {\n      get: function () {\n        return pal.global.document.activeElement;\n      }\n    });\n\n    Object.defineProperty(platform, 'XMLHttpRequest', {\n      get: function () {\n        return pal.global.XMLHttpRequest;\n      }\n    });\n  });\n}\n\n/**\n * @description initializes and makes variables like 'window' into NodeJS globals\n */\nexport function globalize() {\n  initialize();\n  global.window = global.self = PLATFORM.global;\n  global.document = PLATFORM.global.document;\n  global.Element = DOM.Element;\n  global.NodeList = PLATFORM.global.NodeList;\n  global.SVGElement = DOM.SVGElement;\n  global.HTMLElement = PLATFORM.global.HTMLElement;\n  global.requestAnimationFrame = PLATFORM.global.requestAnimationFrame;\n  global.location = PLATFORM.location;\n  global.history = PLATFORM.history;\n  global.System = {\n    import(moduleId: string) {\n      try {\n        return Promise.resolve(require(moduleId));\n      } catch (e) {\n        return Promise.reject(e);\n      }\n    }\n  };\n  global.PAL = {\n    DOM, PLATFORM, FEATURE\n  };\n  return global;\n}\n\nexport function reset(window?: Window) {\n  if (window) {\n    window.close();\n  }\n\n  MutationNotifier.getInstance().destruct();\n}"],"sourceRoot":"../src/"}
\ No newline at end of file
+{"version":3,"sources":["index.ts"],"names":[],"mappings":";AAAA,2CAA2C;;AAE3C,6CAAmF;AACnF,6DAAgD;AAChD,qEAAiE;AAEjE;;EAEE;AACF;IACE,IAAI,2BAAa,EAAE;QACjB,OAAO;KACR;IAED,IAAI,GAAG,GAAG,6BAAQ,EAAE,CAAC;IAErB,2BAAa,CAAC,CAAC,QAAQ,EAAE,OAAO,EAAE,GAAG,EAAE,EAAE;QACvC,MAAM,CAAC,MAAM,CAAC,QAAQ,EAAE,GAAG,CAAC,QAAQ,CAAC,CAAC;QACtC,MAAM,CAAC,cAAc,CAAC,QAAQ,EAAE,GAAG,CAAC,QAAQ,CAAC,WAAW,CAAC,SAAS,CAAC,CAAC;QAEpE,MAAM,CAAC,MAAM,CAAC,GAAG,EAAE,GAAG,CAAC,GAAG,CAAC,CAAC;QAC5B,MAAM,CAAC,cAAc,CAAC,GAAG,EAAE,GAAG,CAAC,GAAG,CAAC,WAAW,CAAC,SAAS,CAAC,CAAC;QAE1D,MAAM,CAAC,MAAM,CAAC,OAAO,EAAE,GAAG,CAAC,OAAO,CAAC,CAAC;QACpC,MAAM,CAAC,cAAc,CAAC,OAAO,EAAE,GAAG,CAAC,OAAO,CAAC,WAAW,CAAC,SAAS,CAAC,CAAC;QAElE,CAAC,UAAU,MAAM;YACf,MAAM,CAAC,OAAO,GAAG,MAAM,CAAC,OAAO,IAAI,EAAE,CAAC;YACtC,IAAI,GAAG,GAAG,MAAM,CAAC,OAAO,CAAC;YACzB,IAAI,IAAI,CAAC;YACT,IAAI,MAAM,CAAC;YACX,IAAI,KAAK,GAAG,EAAE,CAAC;YACf,IAAI,KAAK,GAAG,cAAc,CAAC,CAAC;YAC5B,IAAI,UAAU,GAAG,QAAQ,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;YACrC,IAAI,OAAO,GAAG,CAAC,4DAA4D;gBACzE,4EAA4E;gBAC5E,mEAAmE,CAAC,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;YAClF,OAAO,IAAI,GAAG,UAAU,CAAC,GAAG,EAAE;gBAAE,IAAI,CAAC,GAAG,CAAC,IAAI,CAAC;oBAAE,GAAG,CAAC,IAAI,CAAC,GAAG,KAAK,CAAC;YAClE,OAAO,MAAM,GAAG,OAAO,CAAC,GAAG,EAAE;gBAAE,IAAI,CAAC,GAAG,CAAC,MAAM,CAAC;oBAAE,GAAG,CAAC,MAAM,CAAC,GAAG,KAAK,CAAC;QACvE,CAAC,CAAC,CAAC,QAAQ,CAAC,MAAM,CAAC,CAAC;QAEpB,IAAI,QAAQ,CAAC,MAAM,CAAC,OAAO,IAAI,OAAO,OAAO,CAAC,GAAG,KAAK,QAAQ,EAAE;YAC9D,IAAI,OAAO,OAAO,CAAC,OAAO,CAAC,KAAK,WAAW,EAAE;gBAC3C,OAAO,CAAC,OAAO,CAAC,GAAG,IAAI,CAAC,IAAI,CAAC,OAAO,CAAC,KAAK,CAAC,EAAE,OAAO,CAAC,CAAC;aACvD;YACD,CAAC,KAAK,EAAE,MAAM,EAAE,MAAM,EAAE,OAAO,EAAE,QAAQ,EAAE,KAAK,EAAE,OAAO,EAAE,SAAS,EAAE,YAAY,CAAC,CAAC,OAAO,CAAC,UAAU,MAAM;gBAC1G,OAAO,CAAC,MAAM,CAAC,GAAG,IAAI,CAAC,IAAI,CAAC,OAAO,CAAC,MAAM,CAAC,EAAE,OAAO,CAAC,CAAC;YACxD,CAAC,EAAE,QAAQ,CAAC,SAAS,CAAC,IAAI,CAAC,CAAC;SAC7B;QAED,MAAM,CAAC,cAAc,CAAC,GAAG,EAAE,OAAO,EAAE;YAClC,GAAG,EAAE;gBACH,OAAO,GAAG,CAAC,MAAM,CAAC,QAAQ,CAAC,KAAK,CAAC;YACnC,CAAC;YACD,GAAG,EAAE,UAAU,KAAK;gBAClB,GAAG,CAAC,MAAM,CAAC,QAAQ,CAAC,KAAK,GAAG,KAAK,CAAC;YACpC,CAAC;SACF,CAAC,CAAC;QAEH,MAAM,CAAC,cAAc,CAAC,GAAG,EAAE,eAAe,EAAE;YAC1C,GAAG,EAAE;gBACH,OAAO,GAAG,CAAC,MAAM,CAAC,QAAQ,CAAC,aAAa,CAAC;YAC3C,CAAC;SACF,CAAC,CAAC;QAEH,MAAM,CAAC,cAAc,CAAC,QAAQ,EAAE,gBAAgB,EAAE;YAChD,GAAG,EAAE;gBACH,OAAO,GAAG,CAAC,MAAM,CAAC,cAAc,CAAC;YACnC,CAAC;SACF,CAAC,CAAC;IACL,CAAC,CAAC,CAAC;AACL,CAAC;AA9DD,gCA8DC;AAED;;GAEG;AACH;IACE,UAAU,EAAE,CAAC;IACb,MAAM,CAAC,MAAM,GAAG,MAAM,CAAC,IAAI,GAAG,sBAAQ,CAAC,MAAM,CAAC;IAC9C,MAAM,CAAC,QAAQ,GAAG,sBAAQ,CAAC,MAAM,CAAC,QAAQ,CAAC;IAC3C,MAAM,CAAC,OAAO,GAAG,iBAAG,CAAC,OAAO,CAAC;IAC7B,MAAM,CAAC,QAAQ,GAAG,sBAAQ,CAAC,MAAM,CAAC,QAAQ,CAAC;IAC3C,MAAM,CAAC,UAAU,GAAG,iBAAG,CAAC,UAAU,CAAC;IACnC,MAAM,CAAC,WAAW,GAAG,sBAAQ,CAAC,MAAM,CAAC,WAAW,CAAC;IACjD,MAAM,CAAC,qBAAqB,GAAG,sBAAQ,CAAC,MAAM,CAAC,qBAAqB,CAAC;IACrE,MAAM,CAAC,QAAQ,GAAG,sBAAQ,CAAC,QAAQ,CAAC;IACpC,MAAM,CAAC,OAAO,GAAG,sBAAQ,CAAC,OAAO,CAAC;IAClC,MAAM,CAAC,MAAM,GAAG;QACd,MAAM,CAAC,QAAgB;YACrB,IAAI;gBACF,OAAO,OAAO,CAAC,OAAO,CAAC,OAAO,CAAC,QAAQ,CAAC,CAAC,CAAC;aAC3C;YAAC,OAAO,CAAC,EAAE;gBACV,OAAO,OAAO,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC;aAC1B;QACH,CAAC;KACF,CAAC;IACF,MAAM,CAAC,GAAG,GAAG;QACX,GAAG,EAAH,iBAAG,EAAE,QAAQ,EAAR,sBAAQ,EAAE,OAAO,EAAP,qBAAO;KACvB,CAAC;IACF,OAAO,MAAM,CAAC;AAChB,CAAC;AAxBD,8BAwBC;AAED,eAAsB,MAAe;IACnC,IAAI,MAAM,EAAE;QACV,MAAM,CAAC,KAAK,EAAE,CAAC;KAChB;IAED,oCAAgB,CAAC,WAAW,EAAE,CAAC,QAAQ,EAAE,CAAC;AAC5C,CAAC;AAND,sBAMC","file":"index.js","sourcesContent":["/// <reference path=\"./nodejs-global.ts\" />\n\nimport { initializePAL, DOM, PLATFORM, FEATURE, isInitialized } from 'aurelia-pal';\nimport { buildPal } from './nodejs-pal-builder';\nimport { MutationNotifier } from './polyfills/mutation-observer';\n\n/**\n* Initializes the PAL with the NodeJS-targeted implementation.\n*/\nexport function initialize(): void {\n  if (isInitialized) {\n    return;\n  }\n\n  let pal = buildPal();\n\n  initializePAL((platform, feature, dom) => {\n    Object.assign(platform, pal.platform);\n    Object.setPrototypeOf(platform, pal.platform.constructor.prototype);\n\n    Object.assign(dom, pal.dom);\n    Object.setPrototypeOf(dom, pal.dom.constructor.prototype);\n\n    Object.assign(feature, pal.feature);\n    Object.setPrototypeOf(feature, pal.feature.constructor.prototype);\n\n    (function (global) {\n      global.console = global.console || {};\n      let con = global.console;\n      let prop;\n      let method;\n      let empty = {};\n      let dummy = function () { };\n      let properties = 'memory'.split(',');\n      let methods = ('assert,clear,count,debug,dir,dirxml,error,exception,group,' +\n        'groupCollapsed,groupEnd,info,log,markTimeline,profile,profiles,profileEnd,' +\n        'show,table,time,timeEnd,timeline,timelineEnd,timeStamp,trace,warn').split(',');\n      while (prop = properties.pop()) if (!con[prop]) con[prop] = empty;\n      while (method = methods.pop()) if (!con[method]) con[method] = dummy;\n    })(platform.global);\n\n    if (platform.global.console && typeof console.log === 'object') {\n      if (typeof console['debug'] === 'undefined') {\n        console['debug'] = this.bind(console['log'], console);\n      }\n      ['log', 'info', 'warn', 'error', 'assert', 'dir', 'clear', 'profile', 'profileEnd'].forEach(function (method) {\n        console[method] = this.bind(console[method], console);\n      }, Function.prototype.call);\n    }\n\n    Object.defineProperty(dom, 'title', {\n      get: function () {\n        return pal.global.document.title;\n      },\n      set: function (value) {\n        pal.global.document.title = value;\n      }\n    });\n\n    Object.defineProperty(dom, 'activeElement', {\n      get: function () {\n        return pal.global.document.activeElement;\n      }\n    });\n\n    Object.defineProperty(platform, 'XMLHttpRequest', {\n      get: function () {\n        return pal.global.XMLHttpRequest;\n      }\n    });\n  });\n}\n\n/**\n * @description initializes and makes variables like 'window' into NodeJS globals\n */\nexport function globalize() {\n  initialize();\n  global.window = global.self = PLATFORM.global;\n  global.document = PLATFORM.global.document;\n  global.Element = DOM.Element;\n  global.NodeList = PLATFORM.global.NodeList;\n  global.SVGElement = DOM.SVGElement;\n  global.HTMLElement = PLATFORM.global.HTMLElement;\n  global.requestAnimationFrame = PLATFORM.global.requestAnimationFrame;\n  global.location = PLATFORM.location;\n  global.history = PLATFORM.history;\n  global.System = {\n    import(moduleId: string) {\n      try {\n        return Promise.resolve(require(moduleId));\n      } catch (e) {\n        return Promise.reject(e);\n      }\n    }\n  };\n  global.PAL = {\n    DOM, PLATFORM, FEATURE\n  };\n  return global;\n}\n\nexport function reset(window?: Window) {\n  if (window) {\n    window.close();\n  }\n\n  MutationNotifier.getInstance().destruct();\n}"],"sourceRoot":"../src/"}
\ No newline at end of file
diff --git a/dist/nodejs-dom.d.ts b/dist/nodejs-dom.d.ts
index 6a9fa11..8c95900 100644
--- a/dist/nodejs-dom.d.ts
+++ b/dist/nodejs-dom.d.ts
@@ -1,5 +1,11 @@
 import { IDom } from './dom';
 import { IGlobal } from './global';
+declare module './global' {
+    interface IGlobal {
+        window: any;
+        document: any;
+    }
+}
 /**
 * Represents the core APIs of the DOM.
 */
@@ -12,22 +18,23 @@ export declare class NodeJsDom implements IDom {
     boundary: string;
     title: string;
     activeElement: Element;
-    addEventListener(eventName: string, callback: EventListener, capture: boolean): void;
-    removeEventListener(eventName: string, callback: EventListener, capture: boolean): void;
-    createElement(tagName: string): Element;
+    addEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture: boolean): void;
+    removeEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture: boolean): void;
+    createElement<T extends keyof HTMLElementTagNameMap>(tagName: T): HTMLElementTagNameMap[T];
     createAttribute(name: string): Attr;
     createTextNode(text: string): Text;
     createComment(text: string): Comment;
     createDocumentFragment(): DocumentFragment;
     createTemplateElement(): HTMLTemplateElement;
     createMutationObserver(callback: (changes: MutationRecord[], instance: MutationObserver) => void): MutationObserver;
-    createCustomEvent(eventType: string, options: Object): CustomEvent;
+    createCustomEvent(eventType: string, options?: Object): CustomEvent;
     dispatchEvent(evt: Event): void;
     getComputedStyle(element: Element): CSSStyleDeclaration;
     getElementById(id: string): Element;
-    querySelectorAll(query: string): NodeList;
+    querySelector<E extends Element = Element>(query: string): E | null;
+    querySelectorAll<E extends Element = Element>(query: string): NodeListOf<E>;
     nextElementSibling(element: Element): Element;
-    createTemplateFromMarkup(markup: string): Element;
+    createTemplateFromMarkup(markup: string): HTMLTemplateElement;
     injectStyles(styles: string, destination?: Element, prepend?: boolean): Node;
     adoptNode(node: Node): Node;
     appendNode(newNode: Node, parentNode?: Node): void;
diff --git a/dist/nodejs-dom.js b/dist/nodejs-dom.js
index b7a6fa2..1879553 100644
--- a/dist/nodejs-dom.js
+++ b/dist/nodejs-dom.js
@@ -53,6 +53,9 @@ class NodeJsDom {
     getElementById(id) {
         return this.global.document.getElementById(id);
     }
+    querySelector(query) {
+        return this.global.document.querySelector(query);
+    }
     querySelectorAll(query) {
         return this.global.document.querySelectorAll(query);
     }
diff --git a/dist/nodejs-dom.js.map b/dist/nodejs-dom.js.map
index 2370f77..ef3c978 100644
--- a/dist/nodejs-dom.js.map
+++ b/dist/nodejs-dom.js.map
@@ -1 +1 @@
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{ IDom } from './dom';\nimport { IGlobal } from './global';\n\n/**\n* Represents the core APIs of the DOM.\n*/\nexport class NodeJsDom implements IDom {\n\n  constructor(public global: IGlobal) {\n    this.Element = global.Element;\n    this.NodeList = global.NodeList;\n    this.SVGElement = global.SVGElement || class SVGElement extends global.Element { };\n  }\n\n  Element: typeof Element;\n  NodeList: typeof NodeList;\n  SVGElement: typeof SVGElement /* until a proper implementation is ready: */ | any;\n  boundary: string = 'aurelia-dom-boundary';\n  title: string = \"\";\n  activeElement: Element = null;\n\n  addEventListener(eventName: string, callback: EventListener, capture: boolean): void {\n    return this.global.document.addEventListener(eventName, callback, capture);\n  }\n  removeEventListener(eventName: string, callback: EventListener, capture: boolean): void {\n    return this.global.document.removeEventListener(eventName, callback, capture);\n  }\n  createElement(tagName: string): Element {\n    return this.global.document.createElement(tagName);\n  }\n  createAttribute(name: string): Attr {\n    return this.global.document.createAttribute(name);\n  }\n  createTextNode(text: string): Text {\n    return this.global.document.createTextNode(text);\n  }\n  createComment(text: string): Comment {\n    return this.global.document.createComment(text);\n  }\n  createDocumentFragment(): DocumentFragment {\n    return this.global.document.createDocumentFragment();\n  }\n  createTemplateElement(): HTMLTemplateElement {\n    return this.global.document.createElement('template');\n  }\n  createMutationObserver(callback: (changes: MutationRecord[], instance: MutationObserver) => void): MutationObserver {\n    return new ((<any>this.global.window).MutationObserver)(callback);\n  }\n  createCustomEvent(eventType: string, options: Object): CustomEvent {\n    return new this.global.CustomEvent(eventType, options);\n  }\n  dispatchEvent(evt: Event): void {\n    this.global.window.dispatchEvent(evt);\n  }\n  getComputedStyle(element: Element): CSSStyleDeclaration {\n    return this.global.window.getComputedStyle(element);\n  }\n  getElementById(id: string): Element {\n    return this.global.document.getElementById(id);\n  }\n  querySelectorAll(query: string): NodeList {\n    return this.global.document.querySelectorAll(query);\n  }\n  nextElementSibling(element: Element): Element {\n    return element.nextElementSibling;\n  }\n  createTemplateFromMarkup(markup: string): Element {\n    let parser = this.global.document.createElement('div');\n    parser.innerHTML = markup;\n\n    let temp = parser.firstElementChild;\n    if (!temp || temp.nodeName !== 'TEMPLATE') {\n      throw new Error('Template markup must be wrapped in a <template> element e.g. <template> <!-- markup here --> </template>');\n    }\n    return temp;\n  }\n\n  injectStyles(styles: string, destination?: Element, prepend?: boolean): Node {\n    let node = 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parentNode.removeChild(node);\n    }\n  }\n}\n"],"sourceRoot":"../src/"}
\ No newline at end of file
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{ IDom } from './dom';\nimport { IGlobal } from './global';\n\ndeclare module './global' {\n  interface IGlobal {\n    window: any;\n    document: any;\n  }\n}\n\n/**\n* Represents the core APIs of the DOM.\n*/\nexport class NodeJsDom implements IDom {\n\n  constructor(public global: IGlobal) {\n    this.Element = global.Element;\n    this.NodeList = global.NodeList;\n    this.SVGElement = global.SVGElement || class SVGElement extends global.Element { };\n  }\n\n  Element: typeof Element;\n  NodeList: typeof NodeList;\n  SVGElement: typeof SVGElement /* until a proper implementation is ready: */ | any;\n  boundary: string = 'aurelia-dom-boundary';\n  title: string = \"\";\n  activeElement: Element = null;\n\n  addEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture: boolean): void {\n    return this.global.document.addEventListener(eventName, callback, capture);\n  }\n  removeEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture: boolean): void {\n    return this.global.document.removeEventListener(eventName, callback, capture);\n  }\n  createElement<T extends keyof HTMLElementTagNameMap>(tagName: T): HTMLElementTagNameMap[T];\n  createElement(tagName: string): Element {\n    return this.global.document.createElement(tagName);\n  }\n  createAttribute(name: string): Attr {\n    return this.global.document.createAttribute(name);\n  }\n  createTextNode(text: string): Text {\n    return this.global.document.createTextNode(text);\n  }\n  createComment(text: string): Comment {\n    return this.global.document.createComment(text);\n  }\n  createDocumentFragment(): DocumentFragment {\n    return this.global.document.createDocumentFragment();\n  }\n  createTemplateElement(): HTMLTemplateElement {\n    return this.global.document.createElement('template');\n  }\n  createMutationObserver(callback: (changes: MutationRecord[], instance: MutationObserver) => void): MutationObserver {\n    return new ((<any>this.global.window).MutationObserver)(callback);\n  }\n  createCustomEvent(eventType: string, options?: Object): CustomEvent {\n    return new this.global.CustomEvent(eventType, options);\n  }\n  dispatchEvent(evt: Event): void {\n    this.global.window.dispatchEvent(evt);\n  }\n  getComputedStyle(element: Element): CSSStyleDeclaration {\n    return this.global.window.getComputedStyle(element);\n  }\n  getElementById(id: string): Element {\n    return this.global.document.getElementById(id);\n  }\n  querySelector<E extends Element = Element>(query: string): E | null {\n    return this.global.document.querySelector(query);\n  }\n  querySelectorAll<E extends Element = Element>(query: string): NodeListOf<E> {\n    return this.global.document.querySelectorAll(query);\n  }\n  nextElementSibling(element: Element): Element {\n    return element.nextElementSibling;\n  }\n  createTemplateFromMarkup(markup: string): HTMLTemplateElement {\n    let parser = this.global.document.createElement('div');\n    parser.innerHTML = markup;\n\n    let temp = parser.firstElementChild;\n    if (!temp || temp.nodeName !== 'TEMPLATE') {\n      throw new Error('Template markup must be wrapped in a <template> element e.g. <template> <!-- markup here --> </template>');\n    }\n    return temp;\n  }\n\n  injectStyles(styles: string, destination?: Element, prepend?: boolean): Node {\n    let node = this.global.document.createElement('style');\n    node.innerHTML = styles;\n    node.type = 'text/css';\n\n    destination = destination || this.global.document.head;\n\n    if (prepend && destination.childNodes.length > 0) {\n      destination.insertBefore(node, destination.childNodes[0]);\n    } else {\n      destination.appendChild(node);\n    }\n    return node;\n  }\n\n  adoptNode(node: Node): Node {\n    return this.global.document.adoptNode(node);\n  }\n\n  appendNode(newNode: Node, parentNode?: Node): void {\n    (parentNode || this.global.document.body).appendChild(newNode);\n  }\n\n  replaceNode(newNode: Node, node: Node, parentNode?: Node): void {\n    if (node.parentNode) {\n      node.parentNode.replaceChild(newNode, node);\n    } else {\n      parentNode.replaceChild(newNode, node);\n    }\n  }\n\n  removeNode(node: Node, parentNode?: Node): void {\n    if (node.parentNode) {\n      node.parentNode.removeChild(node);\n    }\n    else {\n      parentNode.removeChild(node);\n    }\n  }\n}\n"],"sourceRoot":"../src/"}
\ No newline at end of file
diff --git a/dist/nodejs-pal-builder.js.map b/dist/nodejs-pal-builder.js.map
index fc15f22..510a09a 100644
--- a/dist/nodejs-pal-builder.js.map
+++ b/dist/nodejs-pal-builder.js.map
@@ -1 +1 @@
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{ initializePAL } from 'aurelia-pal';\nimport { IPlatform } from './platform';\nimport { IGlobal } from './global';\nimport { IDom } from './dom';\nimport { IFeature } from './feature';\nimport { NodeJsPlatform } from './nodejs-platform';\nimport { NodeJsFeature } from './nodejs-feature';\nimport { NodeJsDom } from './nodejs-dom';\nimport { JSDOM } from 'jsdom';\nimport { MutationObserver } from './polyfills/mutation-observer';\nimport { MutationNotifier } from './polyfills/mutation-observer';\n\nlet _patchedjsdom = false;\n\nexport function buildPal(): { global: IGlobal, platform: IPlatform, dom: IDom, feature: IFeature } {\n  var jsdom = new JSDOM(undefined, {});\n  var global: IGlobal = <IGlobal>jsdom.window;\n\n  if (!_patchedjsdom) {\n    patchNotifyChange(global);\n    _patchedjsdom = true;\n  }\n\n  ensurePerformance(global.window);\n  ensureMutationObserver(global.window);\n\n  var platform = new NodeJsPlatform(global, jsdom);\n  var dom = new NodeJsDom(global);\n  var feature = new NodeJsFeature(global);\n\n  return {\n    global: global,\n    platform: platform,\n    dom: dom,\n    feature: feature\n  };\n}\n\nlet intersectSetter = function (proto, propertyName: string, intersect: Function) {\n  let old = Object.getOwnPropertyDescriptor(proto, propertyName);\n  let oldSet = old.set;\n  let newSet = function set(V) {\n    oldSet.call(this, V);\n    intersect(this);\n  };\n  Object.defineProperty(proto, propertyName, {\n    set: newSet,\n    get: old.get,\n    configurable: old.configurable,\n    enumerable: old.enumerable\n  });\n};\n\nlet intersectMethod = function (proto, methodName: string, intersect: Function) {\n  let orig = proto[methodName];\n  proto[methodName] = function (...args) {\n    var ret = orig.apply(this, args);\n    intersect(this);\n    return ret;\n  };\n};\n\nfunction patchNotifyChange(window: Window) {\n  let notifyInstance = MutationNotifier.getInstance();\n  let notify = function (node: Node) { notifyInstance.notifyChanged(node); };\n\n  let node_proto = (<any>window)._core.Node.prototype;\n\n  intersectMethod(node_proto, \"appendChild\", notify);\n  intersectMethod(node_proto, \"insertBefore\", notify);\n  intersectMethod(node_proto, \"removeChild\", notify);\n  intersectMethod(node_proto, \"replaceChild\", notify);\n  intersectSetter(node_proto, \"nodeValue\", notify);\n  intersectSetter(node_proto, \"textContent\", notify);\n\n  let element_proto = (<any>window)._core.Element.prototype;\n\n  intersectMethod(element_proto, \"setAttribute\", notify);\n  intersectMethod(element_proto, \"removeAttribute\", notify);\n  intersectMethod(element_proto, \"removeAttributeNode\", notify);\n  intersectMethod(element_proto, \"removeAttributeNS\", notify);\n}\n\n\nfunction ensurePerformance(window) {\n  const startOffset = Date.now ? Date.now() : + (new Date);\n  const _entries = [];\n  const _marksIndex = {};\n\n  function _filterEntries(key, value) {\n    var i = 0, n = _entries.length, result = [];\n    for (; i < n; i++) {\n      if (_entries[i][key] == value) {\n        result.push(_entries[i]);\n      }\n    }\n    return result;\n  }\n\n  function _clearEntries(type, name) {\n    var i = _entries.length, entry;\n    while (i--) {\n      entry = _entries[i];\n      if (entry.entryType == type && (name === void 0 || entry.name == name)) {\n        _entries.splice(i, 1);\n      }\n    }\n  };\n\n  if (window.performance === undefined) {\n    window.performance = {};\n  }\n\n  if (window.performance.now === undefined) {\n    let nowOffset = Date.now();\n\n    window.performance.now = function now() {\n      return Date.now() - nowOffset;\n    };\n  }\n\n  if (!window.performance.mark) {\n    window.performance.mark = window.performance.webkitMark || function (name) {\n      const mark = {\n        name,\n        entryType: \"mark\",\n        startTime: window.performance.now(),\n        duration: 0\n      };\n\n      _entries.push(mark);\n      _marksIndex[name] = mark;\n    };\n  }\n\n\n  if (!window.performance.measure) {\n    window.performance.measure = window.performance.webkitMeasure || function (name, startMark, endMark) {\n      startMark = _marksIndex[startMark].startTime;\n      endMark = _marksIndex[endMark].startTime;\n\n      _entries.push({\n        name,\n        entryType: \"measure\",\n        startTime: startMark,\n        duration: endMark - startMark\n      });\n    };\n  }\n\n\n  if (!window.performance.getEntriesByType) {\n    window.performance.getEntriesByType = window.performance.webkitGetEntriesByType || function (type) {\n      return _filterEntries(\"entryType\", type);\n    };\n  }\n\n\n  if (!window.performance.getEntriesByName) {\n    window.performance.getEntriesByName = window.performance.webkitGetEntriesByName || function (name) {\n      return _filterEntries(\"name\", name);\n    };\n  }\n\n\n  if (!window.performance.clearMarks) {\n    window.performance.clearMarks = window.performance.webkitClearMarks || function (name) {\n      _clearEntries(\"mark\", name);\n    };\n  }\n\n\n  if (!window.performance.clearMeasures) {\n    window.performance.clearMeasures = window.performance.webkitClearMeasures || function (name) {\n      _clearEntries(\"measure\", name);\n    };\n  }\n}\n\nfunction ensureMutationObserver(window) {\n  if (!window.MutationObserver) {\n    window.MutationObserver = MutationObserver;\n  }\n}\n"],"sourceRoot":"../src/"}
\ No newline at end of file
diff --git a/dist/nodejs-platform.d.ts b/dist/nodejs-platform.d.ts
index 93eb736..86c7080 100644
--- a/dist/nodejs-platform.d.ts
+++ b/dist/nodejs-platform.d.ts
@@ -2,6 +2,15 @@ import { IPlatform } from './platform';
 import { IPerformance } from './performance';
 import { IGlobal } from './global';
 import { JSDOM } from 'jsdom';
+declare module './global' {
+    interface IGlobal {
+        performance: any;
+        location: any;
+        history: any;
+        addEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture?: boolean): void;
+        removeEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture?: boolean): void;
+    }
+}
 export declare class NodeJsPlatform implements IPlatform {
     global: IGlobal;
     jsdom: JSDOM;
@@ -39,14 +48,14 @@ export declare class NodeJsPlatform implements IPlatform {
     * @param callback The function that receives a notification when an event of the specified type occurs.
     * @param capture If true, useCapture indicates that the user wishes to initiate capture.
     */
-    addEventListener(eventName: string, callback: Function, capture?: boolean): void;
+    addEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture?: boolean): void;
     /**
     * Remove a global event listener.
     * @param eventName A string representing the event type to listen for.
     * @param callback The function to remove from the event.
     * @param capture Specifies whether the listener to be removed was registered as a capturing listener or not.
     */
-    removeEventListener(eventName: string, callback: Function, capture?: boolean): void;
+    removeEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture?: boolean): void;
     /**
     * The runtime's XMLHttpRequest API.
     */
diff --git a/dist/nodejs-platform.js.map b/dist/nodejs-platform.js.map
index 69f00cb..553090a 100644
--- a/dist/nodejs-platform.js.map
+++ b/dist/nodejs-platform.js.map
@@ -1 +1 @@
-{"version":3,"sources":["nodejs-platform.ts"],"names":[],"mappings":";;AAKA;IAEE,YAAmB,MAAe,EAAS,KAAY;QAApC,WAAM,GAAN,MAAM,CAAS;QAAS,UAAK,GAAL,KAAK,CAAO;QAOvD;;UAEE;QACF,SAAI,GAAa,QAAQ,CAAC,CAAC;QATzB,IAAI,CAAC,WAAW,GAAG,IAAI,CAAC,MAAM,CAAC,WAAW,CAAC;QAC3C,IAAI,CAAC,QAAQ,GAAG,IAAI,CAAC,MAAM,CAAC,QAAQ,CAAC;QACrC,IAAI,CAAC,OAAO,GAAG,IAAI,CAAC,MAAM,CAAC,OAAO,CAAC;QACnC,IAAI,CAAC,cAAc,GAAG,IAAI,CAAC,MAAM,CAAC,cAAc,CAAC;IACnD,CAAC;IAkBD;;;;MAIE;IACF,qBAAqB,CAAC,QAA+C;QACnE,MAAM,CAAC,YAAY,CAAC,QAAQ,CAAC,CAAC;IAChC,CAAC;IAED;;;MAGE;IACF,UAAU,CAAC,QAAiD;QAC1D,sBAAsB;IACxB,CAAC;IACD;;;;;MAKE;IACF,gBAAgB,CAAC,SAAiB,EAAE,QAAkB,EAAE,OAAiB;QACvE,IAAI,CAAC,MAAM,CAAC,gBAAgB,CAAC,SAAS,EAAO,QAAQ,EAAE,OAAO,CAAC,CAAC;IAClE,CAAC;IACD;;;;;MAKE;IACF,mBAAmB,CAAC,SAAiB,EAAE,QAAkB,EAAE,OAAiB;QAC1E,IAAI,CAAC,MAAM,CAAC,mBAAmB,CAAC,SAAS,EAAO,QAAQ,EAAE,OAAO,CAAC,CAAC;IACrE,CAAC;CAMF;AAhED,wCAgEC","file":"nodejs-platform.js","sourcesContent":["import { IPlatform } from './platform';\nimport { IPerformance } from './performance';\nimport { IGlobal } from './global';\nimport { JSDOM } from 'jsdom';\n\nexport class NodeJsPlatform implements IPlatform {\n\n  constructor(public global: IGlobal, public jsdom: JSDOM) {\n    this.performance = this.global.performance;\n    this.location = this.global.location;\n    this.history = this.global.history;\n    this.XMLHttpRequest = this.global.XMLHttpRequest;\n  }\n\n  /**\n  * A function wich does nothing.\n  */\n  noop: Function = () => { };\n  /**\n  * The runtime's location API.\n  */\n  location: Object;\n  /**\n  * The runtime's history API.\n  */\n  history: Object;\n  /**\n  * The runtime's performance API\n  */\n  performance: IPerformance;\n  /**\n  * Registers a function to call when the system is ready to update (repaint) the display.\n  * @param callback The function to call.\n  * @return A long integer value, the request id, that uniquely identifies the entry in the callback list.\n  */\n  requestAnimationFrame(callback: (animationFrameStart: number) => void): number {\n    return setImmediate(callback);\n  }\n\n  /**\n  * Iterate all modules loaded by the script loader.\n  * @param callback A callback that will receive each module id along with the module object. Return true to end enumeration.\n  */\n  eachModule(callback: (key: string, value: Object) => boolean): void {\n    //TODO: What is this? \n  }\n  /**\n  * Add a global event listener.\n  * @param eventName A string representing the event type to listen for.\n  * @param callback The function that receives a notification when an event of the specified type occurs.\n  * @param capture If true, useCapture indicates that the user wishes to initiate capture.\n  */\n  addEventListener(eventName: string, callback: Function, capture?: boolean): void {\n    this.global.addEventListener(eventName, <any>callback, capture);\n  }\n  /**\n  * Remove a global event listener.\n  * @param eventName A string representing the event type to listen for.\n  * @param callback The function to remove from the event.\n  * @param capture Specifies whether the listener to be removed was registered as a capturing listener or not.\n  */\n  removeEventListener(eventName: string, callback: Function, capture?: boolean): void {\n    this.global.removeEventListener(eventName, <any>callback, capture);\n  }\n\n  /**\n  * The runtime's XMLHttpRequest API.\n  */\n  XMLHttpRequest: typeof XMLHttpRequest;\n}\n"],"sourceRoot":"../src/"}
\ No newline at end of file
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\ No newline at end of file
diff --git a/dist/platform.d.ts b/dist/platform.d.ts
index 79afbe9..388f68c 100644
--- a/dist/platform.d.ts
+++ b/dist/platform.d.ts
@@ -40,14 +40,14 @@ export interface IPlatform {
     * @param callback The function that receives a notification when an event of the specified type occurs.
     * @param capture If true, useCapture indicates that the user wishes to initiate capture.
     */
-    addEventListener(eventName: string, callback: Function, capture?: boolean): void;
+    addEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture?: boolean): void;
     /**
     * Remove a global event listener.
     * @param eventName A string representing the event type to listen for.
     * @param callback The function to remove from the event.
     * @param capture Specifies whether the listener to be removed was registered as a capturing listener or not.
     */
-    removeEventListener(eventName: string, callback: Function, capture?: boolean): void;
+    removeEventListener(eventName: string, callback: EventListenerOrEventListenerObject, capture?: boolean): void;
     /**
     * The runtime's XMLHttpRequest API.
     */
diff --git a/dist/polyfills/mutation-observer.js b/dist/polyfills/mutation-observer.js
index d8a14c9..a7f40a3 100644
--- a/dist/polyfills/mutation-observer.js
+++ b/dist/polyfills/mutation-observer.js
@@ -68,11 +68,11 @@ class Util {
         try {
             return $ele.id || ($ele[this.expando] = $ele[this.expando] || this.counter++);
         }
-        catch (e) {
+        catch (e) { // ie <8 will throw if you set an unknown property on a text node
             try {
                 return $ele.nodeValue; // naive
             }
-            catch (shitie) {
+            catch (shitie) { // when text node is removed: https://gist.github.com/megawac/8355978 :(
                 return this.counter++;
             }
         }
@@ -109,7 +109,7 @@ class Util {
     * @param {string} [prop] Property on set item to compare to item
     */
     static indexOf(set, item, idx, prop) {
-        for (; idx < set.length; idx++) {
+        for ( /*idx = ~~idx*/; idx < set.length; idx++) { // start idx is always given as this is internal
             if ((prop ? set[idx][prop] : set[idx]) === item)
                 return idx;
         }
@@ -230,7 +230,7 @@ class MutationObserver {
         // allow scheduling a new timer. 
         observer._timeout = null;
         let mutations = observer.takeRecords();
-        if (mutations.length) {
+        if (mutations.length) { // fire away
             // calling the listener with context is not spec but currently consistent with FF and WebKit
             observer._listener(mutations, observer);
         }
@@ -319,9 +319,9 @@ class MutationObserver {
                 $cur = $kids[i];
                 oldstruct = $oldkids[j];
                 $old = oldstruct && oldstruct.node;
-                if ($cur === $old) {
+                if ($cur === $old) { // expected case - optimized for this case
                     // check attributes as specified by config
-                    if (config.attr && oldstruct.attr) {
+                    if (config.attr && oldstruct.attr) { /* oldstruct.attr instead of textnode check */
                         this.findAttributeMutations(mutations, $cur, oldstruct.attr, config.afilter);
                     }
                     // check character data if node is a comment or textNode and it's being observed
@@ -340,15 +340,15 @@ class MutationObserver {
                     i++;
                     j++;
                 }
-                else {
+                else { // (uncommon case) lookahead until they are the same again or the end of children
                     dirty = true;
-                    if (!map) {
+                    if (!map) { // delayed initalization (big perf benefit)
                         map = {};
                         conflicts = [];
                     }
                     if ($cur) {
                         // check id is in the location map otherwise do a indexOf search
-                        if (!(map[id = Util.getElementId($cur)])) {
+                        if (!(map[id = Util.getElementId($cur)])) { // to prevent double checking
                             // mark id as found
                             map[id] = true;
                             // custom indexOf using comparitor checking oldkids[i].node === $cur
diff --git a/dist/polyfills/mutation-observer.js.map b/dist/polyfills/mutation-observer.js.map
index eac3fbd..3ebb5be 100644
--- a/dist/polyfills/mutation-observer.js.map
+++ b/dist/polyfills/mutation-observer.js.map
@@ -1 +1 @@
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* Based on Shim for MutationObserver interface\n * Author: Graeme Yeates (github.com/megawac)\n * Repository: https://github.com/megawac/MutationObserver.js\n */\n\nexport class Util {\n  static counter = 1;\n  static expando = 'mo_id';\n\n  static clone($target, config) {\n    let recurse = true; // set true so childList we'll always check the first level\n    return (function copy($target) {\n      let elestruct = {\n        /** @type {Node} */\n        node: $target,\n        charData: null,\n        attr: null,\n        kids: null,\n      };\n\n      // Store current character data of target text or comment node if the config requests\n      // those properties to be observed.\n      if (config.charData && ($target.nodeType === 3 || $target.nodeType === 8)) {\n        elestruct.charData = $target.nodeValue;\n      } else {\n        // Add attr only if subtree is specified or top level and avoid if\n        // attributes is a document object (#13).\n        if (config.attr && recurse && $target.nodeType === 1) {\n          /**\n          * clone live attribute list to an object structure {name: val}\n          * @type {Object.<string, string>}\n          */\n          elestruct.attr = Util.reduce($target.attributes, (memo, attr) => {\n            if (!config.afilter || config.afilter[attr.name]) {\n              memo[attr.name] = attr.value;\n            }\n            return memo;\n          }, {});\n        }\n\n        // whether we should iterate the children of $target node\n        if (recurse && ((config.kids || config.charData) || (config.attr && config.descendents))) {\n          /** @type {Array.<!Object>} : Array of custom clone */\n          elestruct.kids = Util.map($target.childNodes, copy);\n        }\n\n        recurse = config.descendents;\n      }\n      return elestruct;\n    })($target);\n  }\n\n  /**\n  * indexOf an element in a collection of custom nodes\n  *\n  * @param {NodeList} set\n  * @param {!Object} $node : A custom cloned nodeg333\n  * @param {number} idx : index to start the loop\n  * @return {number}\n  */\n  static indexOfCustomNode(set, $node, idx) {\n    const JSCompiler_renameProperty = a => a;\n    return this.indexOf(set, $node, idx, JSCompiler_renameProperty('node'));\n  }\n\n  /**\n  * Attempt to uniquely id an element for hashing. We could optimize this for legacy browsers but it hopefully wont be called enough to be a concern\n  *\n  * @param {Node} $ele\n  * @return {(string|number)}\n  */\n  static getElementId($ele) {\n    try {\n      return $ele.id || ($ele[this.expando] = $ele[this.expando] || this.counter++);\n    } catch (e) { // ie <8 will throw if you set an unknown property on a text node\n      try {\n        return $ele.nodeValue; // naive\n      } catch (shitie) { // when text node is removed: https://gist.github.com/megawac/8355978 :(\n        return this.counter++;\n      }\n    }\n  }\n\n  /**\n  * **map** Apply a mapping function to each item of a set\n  * @param {Array|NodeList} set\n  * @param {Function} iterator\n  */\n  static map(set, iterator) {\n    let results = [];\n    for (let index = 0; index < set.length; index++) {\n      results[index] = iterator(set[index], index, set);\n    }\n    return results;\n  }\n\n  /**\n  * **Reduce** builds up a single result from a list of values\n  * @param {Array|NodeList|NamedNodeMap} set\n  * @param {Function} iterator\n  * @param {*} [memo] Initial value of the memo.\n  */\n  static reduce(set, iterator, memo) {\n    for (let index = 0; index < set.length; index++) {\n      memo = iterator(memo, set[index], index, set);\n    }\n    return memo;\n  }\n\n  /**\n  * **indexOf** find index of item in collection.\n  * @param {Array|NodeList} set\n  * @param {Object} item\n  * @param {number} idx\n  * @param {string} [prop] Property on set item to compare to item\n  */\n  static indexOf(set, item, idx, prop?) {\n    for (/*idx = ~~idx*/; idx < set.length; idx++) {// start idx is always given as this is internal\n      if ((prop ? set[idx][prop] : set[idx]) === item) return idx;\n    }\n    return -1;\n  }\n\n  /**\n  * @param {Object} obj\n  * @param {(string|number)} prop\n  * @return {boolean}\n  */\n  static has(obj, prop) {\n    return obj[prop] !== undefined; // will be nicely inlined by gcc\n  }\n}\n\nexport class MutationObserver {\n  private _watched = [];\n  private _listener = null;\n  private _period = 30;\n  private _timeout = null;\n  private _disposed = false;\n  private _notifyListener = null;\n\n  constructor(listener) {\n    this._watched = [];\n    this._listener = listener;\n    this._period = 30;\n    this._notifyListener = () => { this.scheduleMutationCheck(this); };\n  }\n\n  observe($target, config) {\n    let settings = {\n      attr: !!(config.attributes || config.attributeFilter || config.attributeOldValue),\n\n      // some browsers enforce that subtree must be set with childList, attributes or characterData.\n      // We don't care as spec doesn't specify this rule.\n      kids: !!config.childList,\n      descendents: !!config.subtree,\n      charData: !!(config.characterData || config.characterDataOldValue),\n\n      afilter: null\n    };\n\n    MutationNotifier.getInstance().on(\"changed\", this._notifyListener);\n\n    let watched = this._watched;\n\n    // remove already observed target element from pool\n    for (let i = 0; i < watched.length; i++) {\n      if (watched[i].tar === $target) watched.splice(i, 1);\n    }\n\n    if (config.attributeFilter) {\n      /**\n      * converts to a {key: true} dict for faster lookup\n      * @type {Object.<String,Boolean>}\n      */\n      settings.afilter = Util.reduce(config.attributeFilter, (a, b) => {\n        a[b] = true;\n        return a;\n      }, {});\n    }\n\n    watched.push({\n      tar: $target,\n      fn: this.createMutationSearcher($target, settings)\n    });\n  }\n\n  takeRecords() {\n    let mutations = [];\n    let watched = this._watched;\n\n    for (let i = 0; i < watched.length; i++) {\n      watched[i].fn(mutations);\n    }\n\n    return mutations;\n  }\n\n  disconnect() {\n    this._watched = []; // clear the stuff being observed\n    MutationNotifier.getInstance().removeListener(\"changed\", this._notifyListener );\n    this._disposed = true;\n    clearTimeout(this._timeout); // ready for garbage collection\n    this._timeout = null;\n  }\n\n  private createMutationSearcher($target, config) {\n    /** type {Elestuct} */\n    let $oldstate = Util.clone($target, config); // create the cloned datastructure\n\n    /**\n    * consumes array of mutations we can push to\n    *\n    * @param {Array.<MutationRecord>} mutations\n    */\n    return (mutations) => {\n      let olen = mutations.length;\n      let dirty;\n\n      if (config.charData && $target.nodeType === 3 && $target.nodeValue !== $oldstate.charData) {\n        mutations.push(new MutationRecord({\n          type: 'characterData',\n          target: $target,\n          oldValue: $oldstate.charData\n        }));\n      }\n\n      // Alright we check base level changes in attributes... easy\n      if (config.attr && $oldstate.attr) {\n        this.findAttributeMutations(mutations, $target, $oldstate.attr, config.afilter);\n      }\n\n      // check childlist or subtree for mutations\n      if (config.kids || config.descendents) {\n        dirty = this.searchSubtree(mutations, $target, $oldstate, config);\n      }\n\n      // reclone data structure if theres changes\n      if (dirty || mutations.length !== olen) {\n        /** type {Elestuct} */\n        $oldstate = Util.clone($target, config);\n      }\n    };\n  }\n\n  private scheduleMutationCheck(observer) {\n    // Only schedule if there isn't already a timer. \n    if (!observer._timeout) {\n      observer._timeout = setTimeout(() => this.mutationChecker(observer), this._period);\n    }\n  }\n\n  private mutationChecker(observer) {\n    // allow scheduling a new timer. \n    observer._timeout = null; \n    \n    let mutations = observer.takeRecords();\n\n    if (mutations.length) { // fire away\n      // calling the listener with context is not spec but currently consistent with FF and WebKit\n      observer._listener(mutations, observer);\n    }\n  }\n\n  private searchSubtree(mutations, $target, $oldstate, config) {\n    // Track if the tree is dirty and has to be recomputed (#14).\n    let dirty;\n    /*\n    * Helper to identify node rearrangment and stuff...\n    * There is no gaurentee that the same node will be identified for both added and removed nodes\n    * if the positions have been shuffled.\n    * conflicts array will be emptied by end of operation\n    */\n    const _resolveConflicts = (conflicts, node, $kids, $oldkids, numAddedNodes) => {\n      // the distance between the first conflicting node and the last\n      let distance = conflicts.length - 1;\n      // prevents same conflict being resolved twice consider when two nodes switch places.\n      // only one should be given a mutation event (note -~ is used as a math.ceil shorthand)\n      let counter = -~((distance - numAddedNodes) / 2);\n      let $cur;\n      let oldstruct;\n      let conflict;\n      while ((conflict = conflicts.pop())) {\n        $cur = $kids[conflict.i];\n        oldstruct = $oldkids[conflict.j];\n\n        // attempt to determine if there was node rearrangement... won't gaurentee all matches\n        // also handles case where added/removed nodes cause nodes to be identified as conflicts\n        if (config.kids && counter && Math.abs(conflict.i - conflict.j) >= distance) {\n          mutations.push(new MutationRecord({\n            type: 'childList',\n            target: node,\n            addedNodes: [$cur],\n            removedNodes: [$cur],\n            // haha don't rely on this please\n            nextSibling: $cur.nextSibling,\n            previousSibling: $cur.previousSibling\n          }));\n          counter--; // found conflict\n        }\n\n        // Alright we found the resorted nodes now check for other types of mutations\n        if (config.attr && oldstruct.attr) this.findAttributeMutations(mutations, $cur, oldstruct.attr, config.afilter);\n        if (config.charData && $cur.nodeType === 3 && $cur.nodeValue !== oldstruct.charData) {\n          mutations.push(new MutationRecord({\n            type: 'characterData',\n            target: $cur,\n            oldValue: oldstruct.charData\n          }));\n        }\n        // now look @ subtree\n        if (config.descendents) _findMutations($cur, oldstruct);\n      }\n    };\n\n    /**\n    * Main worker. Finds and adds mutations if there are any\n    * @param {Node} node\n    * @param {!Object} old : A cloned data structure using internal clone\n    */\n    const _findMutations = (node, old) => {\n      let $kids = node.childNodes;\n      let $oldkids = old.kids;\n      let klen = $kids.length;\n      // $oldkids will be undefined for text and comment nodes\n      let olen = $oldkids ? $oldkids.length : 0;\n      // if (!olen && !klen) return; // both empty; clearly no changes\n\n      // we delay the intialization of these for marginal performance in the expected case (actually quite signficant on large subtrees when these would be otherwise unused)\n      // map of checked element of ids to prevent registering the same conflict twice\n      let map;\n      // array of potential conflicts (ie nodes that may have been re arranged)\n      let conflicts;\n      let id; // element id from getElementId helper\n      let idx; // index of a moved or inserted element\n\n      let oldstruct;\n      // current and old nodes\n      let $cur;\n      let $old;\n      // track the number of added nodes so we can resolve conflicts more accurately\n      let numAddedNodes = 0;\n\n      // iterate over both old and current child nodes at the same time\n      let i = 0;\n      let j = 0;\n      // while there is still anything left in $kids or $oldkids (same as i < $kids.length || j < $oldkids.length;)\n      while (i < klen || j < olen) {\n        // current and old nodes at the indexs\n        $cur = $kids[i];\n        oldstruct = $oldkids[j];\n        $old = oldstruct && oldstruct.node;\n\n        if ($cur === $old) { // expected case - optimized for this case\n          // check attributes as specified by config\n          if (config.attr && oldstruct.attr) {/* oldstruct.attr instead of textnode check */\n            this.findAttributeMutations(mutations, $cur, oldstruct.attr, config.afilter);\n          }\n          // check character data if node is a comment or textNode and it's being observed\n          if (config.charData && oldstruct.charData !== undefined && $cur.nodeValue !== oldstruct.charData) {\n            mutations.push(new MutationRecord({\n              type: 'characterData',\n              target: $cur\n            }));\n          }\n\n          // resolve conflicts; it will be undefined if there are no conflicts - otherwise an array\n          if (conflicts) _resolveConflicts(conflicts, node, $kids, $oldkids, numAddedNodes);\n\n          // recurse on next level of children. Avoids the recursive call when there are no children left to iterate\n          if (config.descendents && ($cur.childNodes.length || oldstruct.kids && oldstruct.kids.length)) _findMutations($cur, oldstruct);\n\n          i++;\n          j++;\n        } else { // (uncommon case) lookahead until they are the same again or the end of children\n          dirty = true;\n          if (!map) { // delayed initalization (big perf benefit)\n            map = {};\n            conflicts = [];\n          }\n          if ($cur) {\n            // check id is in the location map otherwise do a indexOf search\n            if (!(map[id = Util.getElementId($cur)])) { // to prevent double checking\n              // mark id as found\n              map[id] = true;\n              // custom indexOf using comparitor checking oldkids[i].node === $cur\n              if ((idx = Util.indexOfCustomNode($oldkids, $cur, j)) === -1) {\n                if (config.kids) {\n                  mutations.push(new MutationRecord({\n                    type: 'childList',\n                    target: node,\n                    addedNodes: [$cur], // $cur is a new node\n                    nextSibling: $cur.nextSibling,\n                    previousSibling: $cur.previousSibling\n                  }));\n                  numAddedNodes++;\n                }\n              } else {\n                conflicts.push({ // add conflict\n                  i: i,\n                  j: idx\n                });\n              }\n            }\n            i++;\n          }\n\n          if ($old &&\n            // special case: the changes may have been resolved: i and j appear congurent so we can continue using the expected case\n            $old !== $kids[i]\n          ) {\n            if (!(map[id = Util.getElementId($old)])) {\n              map[id] = true;\n              if ((idx = Util.indexOf($kids, $old, i)) === -1) {\n                if (config.kids) {\n                  mutations.push(new MutationRecord({\n                    type: 'childList',\n                    target: old.node,\n                    removedNodes: [$old],\n                    nextSibling: $oldkids[j + 1], // praise no indexoutofbounds exception\n                    previousSibling: $oldkids[j - 1]\n                  }));\n                  numAddedNodes--;\n                }\n              } else {\n                conflicts.push({\n                  i: idx,\n                  j: j\n                });\n              }\n            }\n            j++;\n          }\n        }// end uncommon case\n      }// end loop\n\n      // resolve any remaining conflicts\n      if (conflicts) _resolveConflicts(conflicts, node, $kids, $oldkids, numAddedNodes);\n    };\n    _findMutations($target, $oldstate);\n    return dirty;\n  }\n\n  private findAttributeMutations(mutations, $target, $oldstate, filter) {\n    let checked = {};\n    let attributes = $target.attributes;\n    let attr;\n    let name;\n    let i = attributes.length;\n    while (i--) {\n      attr = attributes[i];\n      name = attr.name;\n      if (!filter || Util.has(filter, name)) {\n        if (attr.value !== $oldstate[name]) {\n          // The pushing is redundant but gzips very nicely\n          mutations.push(new MutationRecord({\n            type: 'attributes',\n            target: $target,\n            attributeName: name,\n            oldValue: $oldstate[name],\n            attributeNamespace: attr.namespaceURI // in ie<8 it incorrectly will return undefined\n          }));\n        }\n        checked[name] = true;\n      }\n    }\n    for (name in $oldstate) {\n      if (!(checked[name])) {\n        mutations.push(new MutationRecord({\n          target: $target,\n          type: 'attributes',\n          attributeName: name,\n          oldValue: $oldstate[name]\n        }));\n      }\n    }\n  }\n}\n\nexport class MutationRecord {\n  constructor(data) {\n    let settings = { // technically these should be on proto so hasOwnProperty will return false for non explicitly props\n      type: null,\n      target: null,\n      addedNodes: [],\n      removedNodes: [],\n      previousSibling: null,\n      nextSibling: null,\n      attributeName: null,\n      attributeNamespace: null,\n      oldValue: null\n    };\n    for (let prop in data) {\n      if (Util.has(settings, prop) && data[prop] !== undefined) settings[prop] = data[prop];\n    }\n    return settings;\n  }\n}\n\nimport { EventEmitter } from 'events';\n\nexport class MutationNotifier extends EventEmitter {\n  private static _instance: MutationNotifier = null;\n\n  static getInstance() {\n    if (!MutationNotifier._instance) {\n      MutationNotifier._instance = new MutationNotifier();\n    }\n    return MutationNotifier._instance;\n  }\n\n  constructor() {\n    super();\n    this.setMaxListeners(100);\n  }\n\n  destruct() {\n    this.removeAllListeners(\"changed\");\n  }\n\n  notifyChanged(node: Node) {\n    this.emit(\"changed\", node);\n  }\n}"],"sourceRoot":"../../../src/"}
\ No newline at end of file
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* Based on Shim for MutationObserver interface\n * Author: Graeme Yeates (github.com/megawac)\n * Repository: https://github.com/megawac/MutationObserver.js\n */\n\nexport class Util {\n  static counter = 1;\n  static expando = 'mo_id';\n\n  static clone($target, config) {\n    let recurse = true; // set true so childList we'll always check the first level\n    return (function copy($target) {\n      let elestruct = {\n        /** @type {Node} */\n        node: $target,\n        charData: null,\n        attr: null,\n        kids: null,\n      };\n\n      // Store current character data of target text or comment node if the config requests\n      // those properties to be observed.\n      if (config.charData && ($target.nodeType === 3 || $target.nodeType === 8)) {\n        elestruct.charData = $target.nodeValue;\n      } else {\n        // Add attr only if subtree is specified or top level and avoid if\n        // attributes is a document object (#13).\n        if (config.attr && recurse && $target.nodeType === 1) {\n          /**\n          * clone live attribute list to an object structure {name: val}\n          * @type {Object.<string, string>}\n          */\n          elestruct.attr = Util.reduce($target.attributes, (memo, attr) => {\n            if (!config.afilter || config.afilter[attr.name]) {\n              memo[attr.name] = attr.value;\n            }\n            return memo;\n          }, {});\n        }\n\n        // whether we should iterate the children of $target node\n        if (recurse && ((config.kids || config.charData) || (config.attr && config.descendents))) {\n          /** @type {Array.<!Object>} : Array of custom clone */\n          elestruct.kids = Util.map($target.childNodes, copy);\n        }\n\n        recurse = config.descendents;\n      }\n      return elestruct;\n    })($target);\n  }\n\n  /**\n  * indexOf an element in a collection of custom nodes\n  *\n  * @param {NodeList} set\n  * @param {!Object} $node : A custom cloned nodeg333\n  * @param {number} idx : index to start the loop\n  * @return {number}\n  */\n  static indexOfCustomNode(set, $node, idx) {\n    const JSCompiler_renameProperty = a => a;\n    return this.indexOf(set, $node, idx, JSCompiler_renameProperty('node'));\n  }\n\n  /**\n  * Attempt to uniquely id an element for hashing. We could optimize this for legacy browsers but it hopefully wont be called enough to be a concern\n  *\n  * @param {Node} $ele\n  * @return {(string|number)}\n  */\n  static getElementId($ele) {\n    try {\n      return $ele.id || ($ele[this.expando] = $ele[this.expando] || this.counter++);\n    } catch (e) { // ie <8 will throw if you set an unknown property on a text node\n      try {\n        return $ele.nodeValue; // naive\n      } catch (shitie) { // when text node is removed: https://gist.github.com/megawac/8355978 :(\n        return this.counter++;\n      }\n    }\n  }\n\n  /**\n  * **map** Apply a mapping function to each item of a set\n  * @param {Array|NodeList} set\n  * @param {Function} iterator\n  */\n  static map(set, iterator) {\n    let results = [];\n    for (let index = 0; index < set.length; index++) {\n      results[index] = iterator(set[index], index, set);\n    }\n    return results;\n  }\n\n  /**\n  * **Reduce** builds up a single result from a list of values\n  * @param {Array|NodeList|NamedNodeMap} set\n  * @param {Function} iterator\n  * @param {*} [memo] Initial value of the memo.\n  */\n  static reduce(set, iterator, memo) {\n    for (let index = 0; index < set.length; index++) {\n      memo = iterator(memo, set[index], index, set);\n    }\n    return memo;\n  }\n\n  /**\n  * **indexOf** find index of item in collection.\n  * @param {Array|NodeList} set\n  * @param {Object} item\n  * @param {number} idx\n  * @param {string} [prop] Property on set item to compare to item\n  */\n  static indexOf(set, item, idx, prop?) {\n    for (/*idx = ~~idx*/; idx < set.length; idx++) {// start idx is always given as this is internal\n      if ((prop ? set[idx][prop] : set[idx]) === item) return idx;\n    }\n    return -1;\n  }\n\n  /**\n  * @param {Object} obj\n  * @param {(string|number)} prop\n  * @return {boolean}\n  */\n  static has(obj, prop) {\n    return obj[prop] !== undefined; // will be nicely inlined by gcc\n  }\n}\n\nexport class MutationObserver {\n  private _watched = [];\n  private _listener = null;\n  private _period = 30;\n  private _timeout = null;\n  private _disposed = false;\n  private _notifyListener = null;\n\n  constructor(listener) {\n    this._watched = [];\n    this._listener = listener;\n    this._period = 30;\n    this._notifyListener = () => { this.scheduleMutationCheck(this); };\n  }\n\n  observe($target, config) {\n    let settings = {\n      attr: !!(config.attributes || config.attributeFilter || config.attributeOldValue),\n\n      // some browsers enforce that subtree must be set with childList, attributes or characterData.\n      // We don't care as spec doesn't specify this rule.\n      kids: !!config.childList,\n      descendents: !!config.subtree,\n      charData: !!(config.characterData || config.characterDataOldValue),\n\n      afilter: null\n    };\n\n    MutationNotifier.getInstance().on(\"changed\", this._notifyListener);\n\n    let watched = this._watched;\n\n    // remove already observed target element from pool\n    for (let i = 0; i < watched.length; i++) {\n      if (watched[i].tar === $target) watched.splice(i, 1);\n    }\n\n    if (config.attributeFilter) {\n      /**\n      * converts to a {key: true} dict for faster lookup\n      * @type {Object.<String,Boolean>}\n      */\n      settings.afilter = Util.reduce(config.attributeFilter, (a, b) => {\n        a[b] = true;\n        return a;\n      }, {});\n    }\n\n    watched.push({\n      tar: $target,\n      fn: this.createMutationSearcher($target, settings)\n    });\n  }\n\n  takeRecords() {\n    let mutations = [];\n    let watched = this._watched;\n\n    for (let i = 0; i < watched.length; i++) {\n      watched[i].fn(mutations);\n    }\n\n    return mutations;\n  }\n\n  disconnect() {\n    this._watched = []; // clear the stuff being observed\n    MutationNotifier.getInstance().removeListener(\"changed\", this._notifyListener );\n    this._disposed = true;\n    clearTimeout(this._timeout); // ready for garbage collection\n    this._timeout = null;\n  }\n\n  private createMutationSearcher($target, config) {\n    /** type {Elestuct} */\n    let $oldstate = Util.clone($target, config); // create the cloned datastructure\n\n    /**\n    * consumes array of mutations we can push to\n    *\n    * @param {Array.<MutationRecord>} mutations\n    */\n    return (mutations) => {\n      let olen = mutations.length;\n      let dirty;\n\n      if (config.charData && $target.nodeType === 3 && $target.nodeValue !== $oldstate.charData) {\n        mutations.push(new MutationRecord({\n          type: 'characterData',\n          target: $target,\n          oldValue: $oldstate.charData\n        }));\n      }\n\n      // Alright we check base level changes in attributes... easy\n      if (config.attr && $oldstate.attr) {\n        this.findAttributeMutations(mutations, $target, $oldstate.attr, config.afilter);\n      }\n\n      // check childlist or subtree for mutations\n      if (config.kids || config.descendents) {\n        dirty = this.searchSubtree(mutations, $target, $oldstate, config);\n      }\n\n      // reclone data structure if theres changes\n      if (dirty || mutations.length !== olen) {\n        /** type {Elestuct} */\n        $oldstate = Util.clone($target, config);\n      }\n    };\n  }\n\n  private scheduleMutationCheck(observer) {\n    // Only schedule if there isn't already a timer. \n    if (!observer._timeout) {\n      observer._timeout = setTimeout(() => this.mutationChecker(observer), this._period);\n    }\n  }\n\n  private mutationChecker(observer) {\n    // allow scheduling a new timer. \n    observer._timeout = null; \n    \n    let mutations = observer.takeRecords();\n\n    if (mutations.length) { // fire away\n      // calling the listener with context is not spec but currently consistent with FF and WebKit\n      observer._listener(mutations, observer);\n    }\n  }\n\n  private searchSubtree(mutations, $target, $oldstate, config) {\n    // Track if the tree is dirty and has to be recomputed (#14).\n    let dirty;\n    /*\n    * Helper to identify node rearrangment and stuff...\n    * There is no gaurentee that the same node will be identified for both added and removed nodes\n    * if the positions have been shuffled.\n    * conflicts array will be emptied by end of operation\n    */\n    const _resolveConflicts = (conflicts, node, $kids, $oldkids, numAddedNodes) => {\n      // the distance between the first conflicting node and the last\n      let distance = conflicts.length - 1;\n      // prevents same conflict being resolved twice consider when two nodes switch places.\n      // only one should be given a mutation event (note -~ is used as a math.ceil shorthand)\n      let counter = -~((distance - numAddedNodes) / 2);\n      let $cur;\n      let oldstruct;\n      let conflict;\n      while ((conflict = conflicts.pop())) {\n        $cur = $kids[conflict.i];\n        oldstruct = $oldkids[conflict.j];\n\n        // attempt to determine if there was node rearrangement... won't gaurentee all matches\n        // also handles case where added/removed nodes cause nodes to be identified as conflicts\n        if (config.kids && counter && Math.abs(conflict.i - conflict.j) >= distance) {\n          mutations.push(new MutationRecord({\n            type: 'childList',\n            target: node,\n            addedNodes: [$cur],\n            removedNodes: [$cur],\n            // haha don't rely on this please\n            nextSibling: $cur.nextSibling,\n            previousSibling: $cur.previousSibling\n          }));\n          counter--; // found conflict\n        }\n\n        // Alright we found the resorted nodes now check for other types of mutations\n        if (config.attr && oldstruct.attr) this.findAttributeMutations(mutations, $cur, oldstruct.attr, config.afilter);\n        if (config.charData && $cur.nodeType === 3 && $cur.nodeValue !== oldstruct.charData) {\n          mutations.push(new MutationRecord({\n            type: 'characterData',\n            target: $cur,\n            oldValue: oldstruct.charData\n          }));\n        }\n        // now look @ subtree\n        if (config.descendents) _findMutations($cur, oldstruct);\n      }\n    };\n\n    /**\n    * Main worker. Finds and adds mutations if there are any\n    * @param {Node} node\n    * @param {!Object} old : A cloned data structure using internal clone\n    */\n    const _findMutations = (node, old) => {\n      let $kids = node.childNodes;\n      let $oldkids = old.kids;\n      let klen = $kids.length;\n      // $oldkids will be undefined for text and comment nodes\n      let olen = $oldkids ? $oldkids.length : 0;\n      // if (!olen && !klen) return; // both empty; clearly no changes\n\n      // we delay the intialization of these for marginal performance in the expected case (actually quite signficant on large subtrees when these would be otherwise unused)\n      // map of checked element of ids to prevent registering the same conflict twice\n      let map;\n      // array of potential conflicts (ie nodes that may have been re arranged)\n      let conflicts;\n      let id; // element id from getElementId helper\n      let idx; // index of a moved or inserted element\n\n      let oldstruct;\n      // current and old nodes\n      let $cur;\n      let $old;\n      // track the number of added nodes so we can resolve conflicts more accurately\n      let numAddedNodes = 0;\n\n      // iterate over both old and current child nodes at the same time\n      let i = 0;\n      let j = 0;\n      // while there is still anything left in $kids or $oldkids (same as i < $kids.length || j < $oldkids.length;)\n      while (i < klen || j < olen) {\n        // current and old nodes at the indexs\n        $cur = $kids[i];\n        oldstruct = $oldkids[j];\n        $old = oldstruct && oldstruct.node;\n\n        if ($cur === $old) { // expected case - optimized for this case\n          // check attributes as specified by config\n          if (config.attr && oldstruct.attr) {/* oldstruct.attr instead of textnode check */\n            this.findAttributeMutations(mutations, $cur, oldstruct.attr, config.afilter);\n          }\n          // check character data if node is a comment or textNode and it's being observed\n          if (config.charData && oldstruct.charData !== undefined && $cur.nodeValue !== oldstruct.charData) {\n            mutations.push(new MutationRecord({\n              type: 'characterData',\n              target: $cur\n            }));\n          }\n\n          // resolve conflicts; it will be undefined if there are no conflicts - otherwise an array\n          if (conflicts) _resolveConflicts(conflicts, node, $kids, $oldkids, numAddedNodes);\n\n          // recurse on next level of children. Avoids the recursive call when there are no children left to iterate\n          if (config.descendents && ($cur.childNodes.length || oldstruct.kids && oldstruct.kids.length)) _findMutations($cur, oldstruct);\n\n          i++;\n          j++;\n        } else { // (uncommon case) lookahead until they are the same again or the end of children\n          dirty = true;\n          if (!map) { // delayed initalization (big perf benefit)\n            map = {};\n            conflicts = [];\n          }\n          if ($cur) {\n            // check id is in the location map otherwise do a indexOf search\n            if (!(map[id = Util.getElementId($cur)])) { // to prevent double checking\n              // mark id as found\n              map[id] = true;\n              // custom indexOf using comparitor checking oldkids[i].node === $cur\n              if ((idx = Util.indexOfCustomNode($oldkids, $cur, j)) === -1) {\n                if (config.kids) {\n                  mutations.push(new MutationRecord({\n                    type: 'childList',\n                    target: node,\n                    addedNodes: [$cur], // $cur is a new node\n                    nextSibling: $cur.nextSibling,\n                    previousSibling: $cur.previousSibling\n                  }));\n                  numAddedNodes++;\n                }\n              } else {\n                conflicts.push({ // add conflict\n                  i: i,\n                  j: idx\n                });\n              }\n            }\n            i++;\n          }\n\n          if ($old &&\n            // special case: the changes may have been resolved: i and j appear congurent so we can continue using the expected case\n            $old !== $kids[i]\n          ) {\n            if (!(map[id = Util.getElementId($old)])) {\n              map[id] = true;\n              if ((idx = Util.indexOf($kids, $old, i)) === -1) {\n                if (config.kids) {\n                  mutations.push(new MutationRecord({\n                    type: 'childList',\n                    target: old.node,\n                    removedNodes: [$old],\n                    nextSibling: $oldkids[j + 1], // praise no indexoutofbounds exception\n                    previousSibling: $oldkids[j - 1]\n                  }));\n                  numAddedNodes--;\n                }\n              } else {\n                conflicts.push({\n                  i: idx,\n                  j: j\n                });\n              }\n            }\n            j++;\n          }\n        }// end uncommon case\n      }// end loop\n\n      // resolve any remaining conflicts\n      if (conflicts) _resolveConflicts(conflicts, node, $kids, $oldkids, numAddedNodes);\n    };\n    _findMutations($target, $oldstate);\n    return dirty;\n  }\n\n  private findAttributeMutations(mutations, $target, $oldstate, filter) {\n    let checked = {};\n    let attributes = $target.attributes;\n    let attr;\n    let name;\n    let i = attributes.length;\n    while (i--) {\n      attr = attributes[i];\n      name = attr.name;\n      if (!filter || Util.has(filter, name)) {\n        if (attr.value !== $oldstate[name]) {\n          // The pushing is redundant but gzips very nicely\n          mutations.push(new MutationRecord({\n            type: 'attributes',\n            target: $target,\n            attributeName: name,\n            oldValue: $oldstate[name],\n            attributeNamespace: attr.namespaceURI // in ie<8 it incorrectly will return undefined\n          }));\n        }\n        checked[name] = true;\n      }\n    }\n    for (name in $oldstate) {\n      if (!(checked[name])) {\n        mutations.push(new MutationRecord({\n          target: $target,\n          type: 'attributes',\n          attributeName: name,\n          oldValue: $oldstate[name]\n        }));\n      }\n    }\n  }\n}\n\nexport class MutationRecord {\n  constructor(data) {\n    let settings = { // technically these should be on proto so hasOwnProperty will return false for non explicitly props\n      type: null,\n      target: null,\n      addedNodes: [],\n      removedNodes: [],\n      previousSibling: null,\n      nextSibling: null,\n      attributeName: null,\n      attributeNamespace: null,\n      oldValue: null\n    };\n    for (let prop in data) {\n      if (Util.has(settings, prop) && data[prop] !== undefined) settings[prop] = data[prop];\n    }\n    return settings;\n  }\n}\n\nimport { EventEmitter } from 'events';\n\nexport class MutationNotifier extends EventEmitter {\n  private static _instance: MutationNotifier = null;\n\n  static getInstance() {\n    if (!MutationNotifier._instance) {\n      MutationNotifier._instance = new MutationNotifier();\n    }\n    return MutationNotifier._instance;\n  }\n\n  constructor() {\n    super();\n    this.setMaxListeners(100);\n  }\n\n  destruct() {\n    this.removeAllListeners(\"changed\");\n  }\n\n  notifyChanged(node: Node) {\n    this.emit(\"changed\", node);\n  }\n}"],"sourceRoot":"../../../src/"}
\ No newline at end of file
diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index e4de039..f6f29b9 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -1,3 +1,10 @@
+<a name="1.0.0-beta.3.3.0"></a>
+# [1.0.0-beta.3.3.0](https://github.com/aurelia/pal-nodejs/compare/1.0.0-beta.3.2.0...1.0.0-beta.3.3.0) (2018-04-17)
+
+### Features
+
+* Updated to support new PAL methods and typings.
+
 <a name="1.0.0-beta.3.2.0"></a>
 # [1.0.0-beta.3.2.0](https://github.com/aurelia/pal-nodejs/compare/1.0.0-beta.3.1.0...1.0.0-beta.3.2.0) (2018-03-06)
 
diff --git a/package.json b/package.json
index 30c54c7..7f9730a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aurelia-pal-nodejs",
-  "version": "1.0.0-beta.3.2.0",
+  "version": "1.0.0-beta.3.3.0",
   "description": "The Node.js-specific implementation of Aurelia's platform abstraction layer.",
   "keywords": [
     "aurelia",