From 22927f22d6cef2dcd83fb583c060400f392a7453 Mon Sep 17 00:00:00 2001
From: Tom Jenkinson <tom.jenkinson@bbc.co.uk>
Date: Wed, 20 Jul 2022 09:01:14 +0100
Subject: [PATCH] don't call rm() twice if transition finishes before frame
 callback

---
 src/modules/style.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/modules/style.ts b/src/modules/style.ts
index 7d7ddbe..798c8f0 100755
--- a/src/modules/style.ts
+++ b/src/modules/style.ts
@@ -95,8 +95,12 @@ function applyRemoveStyle(vnode: VNode, rm: () => void): void {
   }
 
   let running = 0;
+  let started = false;
   const onRun = function (ev: TransitionEvent) {
-    if (ev.target === elm) running++;
+    if (ev.target === elm) {
+      started = true;
+      running++;
+    }
   };
   const onEnd = function (ev: TransitionEvent) {
     if (ev.target === elm && --running === 0) {
@@ -114,7 +118,7 @@ function applyRemoveStyle(vnode: VNode, rm: () => void): void {
   (elm as Element).addEventListener("transitionend", onEnd);
 
   nextFrame(function () {
-    if (running === 0) {
+    if (!started) {
       cleanUp();
       rm();
     }