Merge pull request 'fix library type' (#115) from vi.document into dev

Reviewed-on: #115

FRONTEND/src/global.d.ts

@@ -3,3 +3,8 @@ declare module '*.css'
 declare module '@codemirror/lang-javascript'
 
 declare const __VITE_BACKEND_URL__: string
+
+declare module 'react-file-viewer' {
+  const FileViewer: any
+  export default FileViewer
+}