remove RAF in transitionend

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 +34,59 @@ export default ()=>
             <a href="/about">About</a>
         </nav>
 
+        <C.Group>
+            <C.Button></C.Button>
+            <C.Menu>
+            <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>
+                <p>hello!</p>
+
+                <p>hello!</p>
+                <p>hello!</p>
+                <p>hello!</p>
+            </C.Menu>
+        </C.Group>
+
+
+        <C.Group>
+            <C.Button></C.Button>
+            <C.Menu>
+            <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>
+                <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 +1,224 @@
+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 refInitial:React.MutableRefObject<boolean> = React.useRef(true);
+
+    type MenuClassStates = {Keep:string, Open:string, Shut:string, Move:string, Exit:string};
+    const base = `relative transition-all border(8 black) overflow-hidden`;
+    const Classes:MenuClassStates =
+    {
+      Shut: `${base} h-0    top-0  w-1/2   duration-300`,
+      Open: `${base} h-auto top-8  w-full  duration-700`,
+      lol: `${base} h-auto top-36 bg-yellow-500  w-2/3  duration-700`,
+    };
+    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 = refElement.current && Collapser(refElement.current, stateGet.open ? "Open" : "Shut", Classes);
+    }
+    , []);
+    React.useEffect(()=>
+    {
+      (!refInitial.current && refControl.current) && refControl.current(stateGet.open ? "Open" : "Shut", ()=>stateSet({done:true}));
+      refInitial.current = false;
+    }
+    , [stateGet.open]);
+
+    useAway(refElement, (e)=>stateSet({open:false, done:false}) );
+
+    return <div ref={refElement as React.Ref<HTMLDivElement>} class={Classes.Shut}>
+      { (!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 Handler = (e:MouseEvent)=>void
+const Refs:Map<HTMLElement, React.Ref<Handler>> = new Map();
+function isHighest(inElement:HTMLElement, inSelection:HTMLElement[])
+{
+  let currentNode = inElement;
+  while (currentNode != document.body)
+  {
+    currentNode = currentNode.parentNode as HTMLElement;
+    if(currentNode.hasAttribute("data-use-away") && inSelection.includes(currentNode))
+    {
+      return false;
+    }    
+  }
+  return true;
+}
+window.innerWidth && document.addEventListener("click", e=>
+{
+  const path = e.composedPath();
+  const away:HTMLElement[] = [];
+
+  Refs.forEach( (handlerRef, element)=>
+  {
+    if(!path.includes(element) && handlerRef.current)
+    {
+      away.push(element);
+    }
+  });
+
+  away.forEach((element)=>
+  {
+    if(isHighest(element, away))
+    {
+      const handler = Refs.get(element);
+      handler?.current && handler.current(e);
+    }
+  });
+
+}
+, true);
+const useAway =(inRef:React.Ref<HTMLElement>, handleAway:Handler)=>
+{
+  const refHandler:React.MutableRefObject<Handler> = React.useRef(handleAway);
+  refHandler.current = handleAway;
+
+  React.useEffect(()=>
+  {
+    if(inRef.current)
+    {
+      inRef.current.setAttribute("data-use-away", "0");
+      Refs.set(inRef.current, refHandler);      
+    }
+    return ()=> inRef.current && Refs.delete(inRef.current);
+  }
+  , []);
+};
+
+type StyleSize = [classes:string, width:number, height:number];
+type StylePack = Record<string, string>;
+type StyleCalc = Record<string, StyleSize>;
+const StyleCalc =(inElement:HTMLElement, inClasses:StylePack)=>
+{
+  const initialStyle = inElement.getAttribute("style")||"";
+  const initialClass = inElement.getAttribute("class")||"";
+  const output = {} as StyleCalc;
+
+  inElement.setAttribute("style", `transition: none;`);
+  Object.entries(inClasses).forEach(([key, value])=>
+  {
+    inElement.setAttribute("class", value);
+    output[key] =  [value, inElement.offsetWidth, inElement.offsetHeight];
+  });
+  inElement.setAttribute("class", initialClass);
+  inElement.offsetHeight; // this has be be exactly here
+  inElement.setAttribute("style", initialStyle);
+
+  return output;
+};
+
+type DoneCallback =(inState:string)=>void;
+export type CollapseControls =(inOpen?:string, inDone?:DoneCallback)=>void;
+export function Collapser(inElement:HTMLElement, initialState:string, library:Record<string, string>)
+{
+    let userDone:DoneCallback = (openState) => {};
+    let userMode = initialState;
+    let frameRequest = 0;
+    let inTransition = false;
+    let measurements:StyleCalc;
+    const transitions:Set<string> = new Set();
+
+    const run = (inEvent:TransitionEvent)=> (inEvent.target == inElement) && transitions.add(inEvent.propertyName);
+    const end = (inEvent:TransitionEvent)=>
+    {
+      if (inEvent.target == inElement)
+      {
+        transitions.delete(inEvent.propertyName);
+        if(transitions.size === 0)
+        {
+          measurements = StyleCalc(inElement, library);
+          const [, w, h] = measurements[userMode];
+          if(inElement.offsetHeight != h || inElement.offsetWidth != w)
+          {
+            anim(userMode, userDone);
+          }
+          else
+          {
+            inElement.setAttribute("style", "");
+            inTransition = false;
+            userDone(userMode);   
+          }
+        }
+      }
+    };
+    const anim = function(inState:string, inDone)
+    {
+      cancelAnimationFrame(frameRequest);
+
+      if(arguments.length)
+      {
+        if(!library[inState]){ return; }
+
+        userDone = inDone|| ((m)=>{}) as DoneCallback;
+        userMode = inState;
+
+        if(!inTransition)
+        {
+          measurements = StyleCalc(inElement, library);
+        }
+
+        if(measurements)
+        {
+          const [classes, width, height] = measurements[inState] as StyleSize;
+          const oldWidth = inElement.offsetWidth;
+          const oldHeight = inElement.offsetHeight;
+          inElement.style.width  = oldWidth  + "px";
+          inElement.style.height = oldHeight + "px";
+          inTransition = true;
+
+          frameRequest = requestAnimationFrame(()=>
+          {
+            inElement.style.height = height + "px";
+            inElement.style.width = width + "px";
+            inElement.className = classes;
+          });
+        }
+      }
+      else
+      {
+        inElement.removeEventListener("transitionrun", run);
+        inElement.removeEventListener("transitionend", end);
+      }
+    } as CollapseControls;
+
+    inElement.addEventListener("transitionend", end);
+    inElement.addEventListener("transitionrun", run);
+
+    return anim;
+} 

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(