Update README.md

README.md

@@ -4,10 +4,24 @@ Ring-Refresh is a middleware library for Ring that automatically
 triggers a browser refresh when your source files change.
 
 It achieves this by injecting a small Javascript script into any HTML
-response triggered by a `GET` route.
+response triggered by a `GET` route, which then periodically calls back
+to a route which it also adds to the server, which tells it whether any source
+files have changed and as such, whether it should then reload the page.
 
 This library is designed for use only in development environments.
 
+Note that, in respect of clojure source files already running in a jvm, 
+you may also wish to use the ring middleware wrap-reload, which also
+detects source file changes but in its case, injects changed namespaces
+into the running jvm.
+
+Ring-refresh itself will reload static files only and will not touch any running JVM.
+
+## Compatibility with Retit
+
+Currently there is a question mark over whether this library is compatible
+with the reitit router. (however wrap-reload seems to work fine).
+
 ## Installation
 
 Add the following development dependency to your `project.clj` file: