1 files changed, 14 insertions, 0 deletions

diff --git a/client/src/polyfills.ts b/client/src/polyfills.ts
index fbe104aa0..fe44c5e22 100644
--- a/client/src/polyfills.ts
+++ b/client/src/polyfills.ts
@@ -56,6 +56,20 @@ import 'core-js/es7/reflect'
  **/
 // 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 default for Angular itself.