fix: Error viewing revisions

app/scenes/Document/components/DocumentTitle.tsx

@@ -3,6 +3,7 @@ import { Slice } from "prosemirror-model";
 import { Selection } from "prosemirror-state";
 import { __parseFromClipboard } from "prosemirror-view";
 import * as React from "react";
+import { mergeRefs } from "react-merge-refs";
 import styled from "styled-components";
 import breakpoint from "styled-components-breakpoint";
 import isMarkdown from "@shared/editor/lib/isMarkdown";
@@ -64,8 +65,9 @@ const DocumentTitle = React.forwardRef(function _DocumentTitle(
     onBlur,
     placeholder,
   }: Props,
-  ref: React.RefObject<RefHandle>
+  externalRef: React.RefObject<RefHandle>
 ) {
+  const ref = React.useRef<RefHandle>(null);
   const [emojiPickerIsOpen, handleOpen, handleClose] = useBoolean();
   const { editor } = useDocumentContext();
 
@@ -147,13 +149,13 @@ const DocumentTitle = React.forwardRef(function _DocumentTitle(
 
       if (/\/date\s$/.test(value)) {
         title = getCurrentDateAsString();
-        ref.current?.focusAtEnd();
+        ref?.current?.focusAtEnd();
       } else if (/\/time$/.test(value)) {
         title = getCurrentTimeAsString();
-        ref.current?.focusAtEnd();
+        ref?.current?.focusAtEnd();
       } else if (/\/datetime$/.test(value)) {
         title = getCurrentDateTimeAsString();
-        ref.current?.focusAtEnd();
+        ref?.current?.focusAtEnd();
       }
 
       onChangeTitle?.(title);
@@ -249,7 +251,7 @@ const DocumentTitle = React.forwardRef(function _DocumentTitle(
       maxLength={DocumentValidation.maxTitleLength}
       readOnly={readOnly}
       dir="auto"
-      ref={ref}
+      ref={mergeRefs([ref, externalRef])}
     >
       {can.update && !readOnly ? (
         <EmojiWrapper align="center" justify="center" dir={dir}>