diff --git a/src/polyfills.ts b/src/polyfills.ts
index f3d18b9f6..6801cfe1a 100644
--- a/src/polyfills.ts
+++ b/src/polyfills.ts
@@ -62,39 +62,47 @@
 /** IE10 and IE11 requires the following for NgClass support on SVG elements */
 // import 'classlist.js';  // Run `npm install --save classlist.js`.
 
+/** IE10 and IE11 requires the following for the Reflect API. */
+// import 'core-js/es6/reflect';
+
+
 /** Evergreen browsers require these. **/
-import 'core-js/es6/reflect';
+// Used for reflect-metadata in JIT. If you use AOT (and only Angular decorators), you can remove.
 import 'core-js/es7/reflect';
 
 
 /**
- * Required to support Web Animations `@angular/platform-browser/animations`.
- * Needed for: All but Chrome, Firefox and Opera. http://caniuse.com/#feat=web-animation
+ * Web Animations `@angular/platform-browser/animations`
+ * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
+ * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
  **/
-import 'web-animations-js';  // Run `npm install --save web-animations-js`.
+// import 'web-animations-js';  // Run `npm install --save web-animations-js`.
 
+/**
+ * By default, zone.js will patch all possible macroTask and DomEvents
+ * user can disable parts of macroTask/DomEvents patch by setting following flags
+ */
 
+ // (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
+ // (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
+ // (window as any).__zone_symbol__BLACK_LISTED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
+
+ /*
+ * in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
+ * with the following flag, it will bypass `zone.js` patch for IE/Edge
+ */
+// (window as any).__Zone_enable_cross_context_check = true;
 
 /***************************************************************************************************
- * Zone JS is required by Angular itself.
+ * Zone JS is required by default for Angular itself.
  */
 import 'zone.js/dist/zone';  // Included with Angular CLI.
 
 
-
 /***************************************************************************************************
  * APPLICATION IMPORTS
  */
 
-/**
- * Date, currency, decimal and percent pipes.
- * Needed for: All but Chrome, Firefox, Edge, IE11 and Safari 10
- */
-// import 'intl';  // Run `npm install --save intl`.
-/**
- * Need to import at least one locale-data with intl.
- */
-// import 'intl/locale-data/jsonp/en';
 
 // workaround for https://github.com/Microsoft/monaco-editor/issues/790