diff --git a/landing/subscription-form.react.js b/landing/subscription-form.react.js
--- a/landing/subscription-form.react.js
+++ b/landing/subscription-form.react.js
@@ -21,7 +21,7 @@
     React.useState<SubscriptionFormStatus>({ status: 'pending' });
 
   const onEmailSubmitted = React.useCallback(
-    async (e: Event) => {
+    async (e: SyntheticEvent<HTMLButtonElement>) => {
       e.preventDefault();
 
       if (
diff --git a/web/chat/chat-input-bar.react.js b/web/chat/chat-input-bar.react.js
--- a/web/chat/chat-input-bar.react.js
+++ b/web/chat/chat-input-bar.react.js
@@ -460,13 +460,18 @@
       Escape: close,
     };
 
-    if (
-      this.props.inputState.typeaheadState.canBeVisible &&
-      actions[event.key]
-    ) {
+    const eventKey = event.key;
+
+    if (!Object.keys(actions).includes(eventKey)) {
+      return;
+    }
+
+    const action = actions[eventKey];
+
+    if (this.props.inputState.typeaheadState.canBeVisible && action) {
       event.preventDefault();
-      actions[event.key]();
-    } else if (event.key === 'Enter' && !event.shiftKey) {
+      action();
+    } else if (eventKey === 'Enter' && !event.shiftKey) {
       event.preventDefault();
       this.send();
     }
diff --git a/web/sidebar/community-picker.react.js b/web/sidebar/community-picker.react.js
--- a/web/sidebar/community-picker.react.js
+++ b/web/sidebar/community-picker.react.js
@@ -25,7 +25,7 @@
   const modalContext = useModalContext();
 
   const openAccountSettings = React.useCallback(
-    (event: SyntheticEvent<HTMLButtonElement>) => {
+    (event: SyntheticEvent<HTMLAnchorElement | HTMLDivElement>) => {
       event.preventDefault();
       dispatch({
         type: updateNavInfoActionType,