Ensure that your React app's basic authentication is secure.
Double-check the HTML code for resiliency.
When parsing URLs, use allowlist/blocklist and validation.
When allowing a connection to any database, always follow the concept of least privilege.
Keep your React APIs safe.
Protected routes are those that only allow authorised users access. This means that users must first complete certain requirements before being able to access that particular route. For example, your application may only allow logged-in users to access the dashboard page.