fix double done event

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 +34,20 @@ 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>
+                <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>}>

example/tree-menu.tsx

@@ -0,0 +1,154 @@
+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 );
+
+    type MenuClassStates = {Keep:string, Open:string, Shut:string, Move:string, Exit:string};
+    const Classes:MenuClassStates =
+    {
+      Keep: "relative transition-all border(8 black) ",
+      Open: "h-auto w-1/2     top-8  duration-700",
+      Shut: "h-0    w-[300px] top-0 duration-300",
+      Move: "",
+      Exit: "h-auto w-auto top-36 px-4 opacity-0"
+    };
+    const Window = window as {TwindInst?:(c:string)=>string};
+    if(Window.TwindInst)
+    {
+      for(let stateName in Classes)
+      {
+        Classes[stateName as keyof MenuClassStates] = Window.TwindInst(Classes[stateName as keyof MenuClassStates]);
+      }
+    }
+
+    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={Classes.Keep} data-class-keep={Classes.Keep} data-class-open={Classes.Open} data-class-shut={Classes.Shut} ref={refElement as React.Ref<HTMLDivElement>}>
+      { (!stateGet.open && stateGet.done) ? null : 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;
+    let inTransition = false;
+
+    let transitions = new Set();
+    let measurements:false|Record<string, { width: number; height: number; }>
+
+    const run = (inEvent:TransitionEvent)=>
+    {
+      if (inEvent.target == inElement)
+      {
+        transitions.add(inEvent.propertyName);
+      }
+    };
+
+    const end = (inEvent:TransitionEvent)=>
+    {
+      if (inEvent.target == inElement)
+      {
+        transitions.delete(inEvent.propertyName);
+        if(transitions.size === 0)
+        {
+          if (userMode)
+          {
+            inElement.setAttribute("style", "transition:none;");
+            inElement.clientHeight;
+            frameRequest = requestAnimationFrame(()=>{inElement.setAttribute("style", "")});
+          }
+          inTransition = false;
+          userDone(userMode);          
+        }
+
+      }
+    };
+
+    const getMeasurements =(inClasses:Record<string, string>)=>
+    {
+      inElement.setAttribute("style", `transition: none;`);
+      const initialClasses = inElement.getAttribute("class")||"";
+      const output = {} as Record<string, {width:number, height:number}>;
+      Object.entries(inClasses).forEach(([key, value])=>
+      {
+        inElement.setAttribute("class", value);
+        output[key] = { width: inElement.offsetWidth, height: inElement.offsetHeight };
+      });
+      inElement.removeAttribute("style");
+      inElement.setAttribute("class", initialClasses);
+      return output;
+    };
+  
+    inElement.addEventListener("transitionend", end);
+    inElement.addEventListener("transitionrun", run);
+
+    return function(inOpen, inMs, inDone)
+    {
+      cancelAnimationFrame(frameRequest);
+
+      if(arguments.length)
+      {
+        userDone = inDone|| ((m)=>{}) as DoneCallback;
+        userMode = inOpen === true;
+
+        if((inOpen || !measurements) && !inTransition)
+        {
+          const keep = inElement.getAttribute("data-class-keep")+" ";
+          measurements = getMeasurements({
+            Open: keep + inElement.getAttribute("data-class-open"),
+            Shut: keep + inElement.getAttribute("data-class-shut"),
+          });
+        }
+
+        inElement.style.overflow = "hidden";
+        inElement.style.width = inElement.offsetWidth + "px";
+        inElement.style.height = inElement.offsetHeight + "px";
+
+        inTransition = true;
+
+        frameRequest = requestAnimationFrame(()=>
+        {
+            const measure = inOpen ? measurements.Open : measurements.Shut;
+            inElement.style.width = measure.width + "px";
+            inElement.style.height = measure.height + "px";
+            inElement.className = inElement.getAttribute("data-class-keep") + " " + inElement.getAttribute(`data-class-${inOpen?"open":"shut"}`);
+
+        });
+      }
+      else
+      {
+        inElement.removeEventListener("transitionrun", run);
+        inElement.removeEventListener("transitionend", end);
+      }
+    } as CollapseControls;
+}

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(