If it’s a Single Page Application (SPA) a requirement is that is created in React. React covers around 70% of the SPAs.
If use React client router in web application, need configure JavaScript file which contains the router code. This is because VAP proxy changes web application URL, add a GUID in the URL. It causes URL not to match with react router mapping settings. Proxy will dynamically change router setting in the JavaScript file.
If you are not clear with how to configure SPA application JavaScript file, please contact VAP team.