Client Routing ↔ SPA Routing to nav within Web App w/o page refresh, via Thick Client JS
aka CSR, Client-Side-Routing
Routing
(process) to respond & serve content to Client Navigation Events/requests
References
react-router-dom↔ React Lib for Routing Primitives to Client Routing & Server Side Render in Declarative Composable waySPA↔ Web App run on single Web Page by Thick Client with seamless functionality ie CSR/(dir)↔ ( Next 12 ) to excl dir from CSR