Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/tools/js/Shared/components/EditorBox/EditorBox.tsx

@@ -0,0 +1,13 @@
+import clsx from "clsx";
+import React from "react";
+
+interface Props {
+  className?: string,
+}
+export default class EditorBox extends React.PureComponent<Props> {
+  render() {
+    const { children, className } = this.props;
+
+    return <div className={clsx(["ct-editor-box", className])}>{children}</div>;
+  }
+}

ddb_main/tools/js/Shared/components/EditorBox/index.ts

@@ -0,0 +1,4 @@
+import EditorBox from "./EditorBox";
+
+export default EditorBox;
+export { EditorBox };