first commit

common/resources/client/utils/dom/create-event-handler.ts

@@ -0,0 +1,12 @@
+import {EventHandler, SyntheticEvent} from 'react';
+
+export function createEventHandler(handler?: EventHandler<SyntheticEvent>) {
+  if (!handler) return handler;
+
+  return (e: SyntheticEvent) => {
+    // ignore events bubbling up from portals
+    if (e.currentTarget.contains(e.target as HTMLElement)) {
+      handler(e);
+    }
+  };
+}