Adds polyfill for CustomEventcustom-event-polyfill

1 files changed, 12 insertions, 0 deletions

diff --git a/app/assets/javascripts/lib/utils/custom_event_polyfill.js.es6 b/app/assets/javascripts/lib/utils/custom_event_polyfill.js.es6
new file mode 100644
index 00000000000..5ae978010c9
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/custom_event_polyfill.js.es6
@@ -0,0 +1,12 @@
+/**
+ * CustomEvent support for IE
+ */
+if (typeof window.CustomEvent !== 'function') {
+  window.CustomEvent = function CustomEvent(e, params) {
+    const options = params || { bubbles: false, cancelable: false, detail: undefined };
+    const evt = document.createEvent('CustomEvent');
+    evt.initCustomEvent(e, options.bubbles, options.cancelable, options.detail);
+    return evt;
+  };
+  window.CustomEvent.prototype = window.Event.prototype;
+}