I should have commited sooner...

Logic/Web/Hash.ts

@@ -0,0 +1,18 @@
+import {UIEventSource} from "../UIEventSource";
+
+export default class Hash {
+    
+    public static Get() : UIEventSource<string>{
+        const hash = new UIEventSource<string>(window.location.hash.substr(1));
+        hash.addCallback(h => {
+            h = h.replace(/\//g, "_");
+            return window.location.hash = "#" + h;
+        });
+        window.onhashchange = () => {
+            hash.setData(window.location.hash.substr(1))
+        }
+        
+        return hash;
+    }
+    
+}