diff --git a/example/app.tsx b/example/app.tsx
index 2f45e75..4d3d993 100644
--- a/example/app.tsx
+++ b/example/app.tsx
@@ -1,5 +1,6 @@
 import React from "react";
 import * as Iso from "@eno/iso";
+import * as C from "./tree-menu.tsx";
 
 /*
 const delay =(inMS:number)=>
@@ -33,6 +34,32 @@ export default ()=>
             <a href="/about">About</a>
         </nav>
 
+        <C.Group>
+            <C.Button></C.Button>
+            <C.Menu>
+                <p>hello!</p>
+                <p>hello!</p>
+                <p>hello!</p>
+                <p>hello!</p>
+                <C.Group>
+                <C.Button></C.Button>
+                <C.Menu>
+                    <p>hello!</p>
+                    <p>hello!</p>
+                    <p>hello!</p>
+                    <p>hello!</p>
+                    <p>hello!</p>
+                    <p>hello!</p>
+                    <p>hello!</p>
+                </C.Menu>
+            </C.Group>
+                <p>hello!</p>
+                <p>hello!</p>
+                <p>hello!</p>
+            </C.Menu>
+        </C.Group>
+
+
         <h1 class="my-2 font(bold serif) text(3xl)">Title!!</h1>
         <h2>suspended:</h2>
         <React.Suspense fallback={<div>Loading!</div>}>
diff --git a/example/tree-menu.tsx b/example/tree-menu.tsx
new file mode 100644
index 0000000..055a6a0
--- /dev/null
+++ b/example/tree-menu.tsx
@@ -0,0 +1,110 @@
+import React from "react";
+
+type StateArgs = {done?:boolean, open?:boolean};
+type StateObj = {done:boolean, open:boolean};
+type StateBinding = [state:StateObj, update:(args:StateArgs)=>void];
+
+const CTX = React.createContext([{done:true, open:false}, (args)=>{}] as StateBinding);
+
+export const Group =(props:{children:React.JSX.Element|React.JSX.Element[]})=>
+{
+    const [stateGet, stateSet] = React.useState({done:true, open:false} as StateObj);
+    return <CTX.Provider value={[stateGet, (args:StateArgs)=> stateSet({...stateGet, ...args})]}>{props.children}</CTX.Provider>;
+};
+
+export const Menu =(props:{children:React.JSX.Element|React.JSX.Element[]})=>
+{
+    const [stateGet, stateSet] = React.useContext(CTX);
+    const refElement:React.MutableRefObject<HTMLElement|null> = React.useRef( null );
+    const refControl:React.MutableRefObject<CollapseControls|null> = React.useRef( null );
+
+    const classOpen = "h-auto -top-10";
+    const classShut = "h-0 top-0";
+
+    window.TwindInst(classOpen);
+    window.TwindInst(classShut);
+
+    React.useEffect(()=>refControl.current = Collapser(refElement.current as HTMLElement, true), []);
+    React.useEffect(()=> {refControl.current && refControl.current(stateGet.open, 1000, ()=>stateSet({done:true}))}, [stateGet.open])
+
+    return <div class="relative transition-all duration-700" data-class-open={classOpen} data-class-shut={classShut} ref={refElement as React.Ref<HTMLDivElement>}>{props.children}</div>;
+};
+
+export const Button =()=>
+{
+    const [stateGet, stateSet] = React.useContext(CTX);
+    return <>
+        <p>{JSON.stringify(stateGet)}</p>
+        <button class="px-10 py-2 bg-red-500 text-white" onClick={e=>stateSet({open:true,  done:false})}>Open</button>
+        <button class="px-10 py-2 bg-red-500 text-white" onClick={e=>stateSet({open:false, done:false})}>Close</button>
+    </>;
+};
+
+type DoneCallback =(openState:boolean)=>void;
+export type CollapseControls =(inOpen?:boolean, inMs?:number, inDone?:DoneCallback)=>void;
+export function Collapser(inElement:HTMLElement, initialState = false)
+{
+    let userDone:DoneCallback = (openState) => {};
+    let userMode = initialState;
+    let frameRequest = 0;
+
+    const done = (inEvent:TransitionEvent)=>
+    {
+      if (inEvent.propertyName == "height" && inEvent.target == inElement)
+      {
+        inEvent.stopPropagation();
+        if (userMode)
+        {
+          inElement.style.height = "auto";
+          inElement.style.overflow = "visible";
+        }
+        userDone(userMode);
+      }
+    };
+    inElement.addEventListener("transitionend", done);
+
+    return function(inOpen, inMs, inDone)
+    {
+      cancelAnimationFrame(frameRequest);
+
+      if(arguments.length)
+      {
+        userDone = inDone|| ((m)=>{}) as DoneCallback;
+        userMode = inOpen === true;
+
+        inElement.style.height = inElement.clientHeight + "px";
+        inElement.style.overflow = "hidden";
+        inElement.style.transition = "none";
+
+        const h1 = inElement.clientHeight;
+        const classesStart = inElement.className;
+
+        inElement.style.height = "";
+        inElement.className = classesStart + " " + inElement.getAttribute(`data-class-${inOpen?"open":"shut"}`);
+        const h2 = inElement.clientHeight;
+        console.log("when classes are (", inElement.className , ") height is", h2);
+
+        inElement.style.height = h1+"px";
+        inElement.className = classesStart;
+
+        console.log("LOOK", h1, h2);
+
+
+
+
+        frameRequest = requestAnimationFrame(()=>
+        {
+          inElement.style.transition = "";
+            frameRequest = requestAnimationFrame(()=>
+            {
+                inElement.style.height = `${h2}px`;
+            });
+          
+        });
+      }
+      else
+      {
+        inElement.removeEventListener("transitionend", done);
+      }
+    } as CollapseControls;
+}
\ No newline at end of file
diff --git a/server.tsx b/server.tsx
index 0fe76ff..1f269a0 100644
--- a/server.tsx
+++ b/server.tsx
@@ -304,6 +304,9 @@ console.log(`Args seen: `, Flags);
 const {Transpileable, TranspileURL, SocketsHandler} = Transpiler(DevMode);
 let {Imports, App, TwindInst, Error} = await Configure(DevMode, Path.LibDir);
 
+//@ts-ignore
+window.TwindInst = TwindInst;
+
 if(Error)
 {
     console.log(Error);
@@ -423,7 +426,7 @@ else if(App && TwindInst)
                 import * as Twind from "https://esm.sh/v115/@twind/core@1.1.3/es2022/core.mjs";
                 import * as App from "@eno/app";
                 import {Router, Fetch, CSS, Meta} from "@eno/iso";
-                Twind.install(App.CSS ? {...CSS, ...App.CSS} : CSS);
+                window.TwindInst = Twind.install(App.CSS ? {...CSS, ...App.CSS} : CSS);
                 Fetch.Seed(${JSON.stringify(seed)});
                 const hmrWrap = H( ()=>H(App.default) );
                 hydrate(