2 files changed, 8 insertions, 3 deletions
diff --git a/app/assets/javascripts/commons/polyfills/custom_event.js b/app/assets/javascripts/commons/polyfills/custom_event.js
index 8fd41fdd8dc..db51ade61ae 100644
--- a/app/assets/javascripts/commons/polyfills/custom_event.js
+++ b/app/assets/javascripts/commons/polyfills/custom_event.js
@@ -1,11 +1,12 @@
 if (typeof window.CustomEvent !== 'function') {
   window.CustomEvent = function CustomEvent(event, params) {
     const evt = document.createEvent('CustomEvent');
-    const evtParams = Object.assign({}, params, {
+    const evtParams = {
       bubbles: false,
       cancelable: false,
       detail: undefined,
-    });
+      ...params,
+    };
     evt.initCustomEvent(event, evtParams.bubbles, evtParams.cancelable, evtParams.detail);
     return evt;
   };
diff --git a/app/assets/javascripts/commons/polyfills/event.js b/app/assets/javascripts/commons/polyfills/event.js
index 50c7644f27d..ff5b9a1982f 100644
--- a/app/assets/javascripts/commons/polyfills/event.js
+++ b/app/assets/javascripts/commons/polyfills/event.js
@@ -6,7 +6,11 @@
 if (typeof window.Event !== 'function') {
   window.Event = function Event(event, params) {
     const evt = document.createEvent('Event');
-    const evtParams = Object.assign({}, params, { bubbles: false, cancelable: false });
+    const evtParams = {
+      bubbles: false,
+      cancelable: false,
+      ...params,
+    };
     evt.initEvent(event, evtParams.bubbles, evtParams.cancelable);
     return evt;
   };