diff --git a/app.tsx b/app.tsx
index 787f4b5..c51ef22 100644
--- a/app.tsx
+++ b/app.tsx
@@ -1,7 +1,33 @@
-import * as ISO from ">able/iso-elements.tsx";
+import {Route, useRoute} from ">able/iso-router.tsx";
 
-console.log(ISO)
+const Tracer =()=>
+{
+    const {nestedDepth, pathIndex} = useRoute();
+    return <div>Depth: {nestedDepth}, Index:{pathIndex}</div>
+}
 
 export default ()=><div>
     <h1 class="p-4 bg-red-500 text-white">App</h1>
+    <nav class="flex gap-10 p-6">
+        <a href="/">Home</a>
+        <a href="/about">About</a>
+    </nav>
+    <Route path={[]}>
+        
+        <p>home page! <Tracer/></p>
+    </Route>
+    <Route path={["about"]}>
+        
+        <nav class="flex gap-10 p-6">
+            <a href="/about/more">more</a>
+        </nav>
+        <Route path={[]}>
+            
+            <p>About page! <Tracer/></p>
+        </Route>
+        <Route path={["more"]}>
+            
+            <p>more!<Tracer/></p>
+        </Route>
+    </Route>
 </div>;
\ No newline at end of file
diff --git a/iso-router.tsx b/iso-router.tsx
index d8f9c45..25df41e 100644
--- a/iso-router.tsx
+++ b/iso-router.tsx
@@ -19,12 +19,13 @@ export const useMeta=(fields:MetaFields)=>
 }
 export const Meta =(props:MetaFields)=> { useMeta(props); return null; }
 
+
+
 //////// Router
 //// Create Signals
-export const pageURL = Signal.signal(new URL(globalThis.location.href || ""));
+export const pageURL = Signal.signal(new URL(globalThis?.location.href || ""));
 export const pagePath = Signal.signal([] as string[]);
 Signal.effect(()=> pagePath.value = pageURL.value.pathname.split("/").filter(part=>part!=""));
-
 //// Add handlers
 globalThis.addEventListener("click", e=>
 {
@@ -43,33 +44,28 @@ globalThis.addEventListener("click", e=>
     })
 });
 globalThis.addEventListener("popstate", _=> pageURL.value = new URL(globalThis.location.href) );
-
 /// Rendering context
 type RouteContextData = {
     /** Current nested depth of the router */ nestedDepth:number,
     /** Index into the page path to start matching routes */ pathIndex:number,
-    /** Collection of keys from matched routes ("page/:key/") */ keys: Record<string, string>
+    /** Collection of keys from matched routes ("page/:key/") */ keys: Record<string, string>,
+    blocked: Signal.Signal<string | false>
 }
-const context = React.createContext({nestedDepth:0, pathIndex:0, keys:{}} as RouteContextData);
-export const useRoute =()=> React.useContext(context);
-export const Route =(props:{path:string[], children:React.ReactNode|React.ReactNode[]}):React.JSX.Element|null=>
+const context = React.createContext({nestedDepth:0, pathIndex:0, keys:{}, blocked:Signal.signal(false as false|string)} as RouteContextData);
+type PathFields = {pathAfter:string[], pathBefore:[], compare:typeof compare}
+const compare =(pathA:string[], pathB:string[])=>
 {
-    // Match the current page url, with a route.
-    const {nestedDepth, pathIndex} = React.useContext(context);
-    const pagePathRange = pagePath.value.slice(pathIndex);
-    const emptyMatch = !props.path.length && !pagePathRange.length;
-    const comparisonSize = Math.min(props.path.length, pagePath.value.length);
-
+    const emptyMatch = !pathA.length && !pathB.length;
+    const comparisonSize = Math.min(pathA.length, pathB.length);
     if(comparisonSize == 0 && emptyMatch === false) // one of the arrays is empty and one is not
     {
         return null;
     }
-
     const keys = {} as Record<string, string>; // not doing anything with this currently
     for(let i=0; i<comparisonSize; i++)
     {
-        const partPage = pagePathRange[i];
-        const partRoute = props.path[i];
+        const partPage = pathB[i];
+        const partRoute = pathA[i];
         if(partPage !== partRoute) // theres a mismatch
         {
             if(partRoute?.startsWith(":")) // mismatch because variable capture, consider it a match and capture
@@ -83,6 +79,30 @@ export const Route =(props:{path:string[], children:React.ReactNode|React.ReactN
             }
         }
     }
-
-    return <context.Provider value={{nestedDepth:nestedDepth+1, pathIndex:pathIndex+comparisonSize, keys}}>{props.children}</context.Provider>
+    return {comparisonSize, keys};
+};
+export const useRoute =()=> {
+    const routeContext = React.useContext(context);
+    const pathFull = pagePath.value;
+    const pathAfter = pathFull.slice(routeContext.pathIndex);
+    const pathBefore = pathFull.slice(0, Math.max(0, routeContext.pathIndex-1));
+    return { ...routeContext, pathAfter, pathBefore, compare } as PathFields&RouteContextData;
+}
+export const Route =(props:{path:string[], children:React.ReactNode|React.ReactNode[]}):React.JSX.Element|null=>
+{
+    const {nestedDepth, pathIndex, pathAfter, compare, keys} = useRoute();
+    const check = compare(props.path, pathAfter);
+    if (check)
+    {
+        return <context.Provider value={{
+            nestedDepth:nestedDepth+1,
+            pathIndex:pathIndex+check.comparisonSize,
+            keys: {...keys, ...check.keys},
+            blocked:Signal.signal(false)
+        }}>{props.children}</context.Provider>;
+    }
+    else
+    {
+        return null;
+    }
 }
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