From f12b7c5970e6af8b1a0a60db69e2cd4a0501b308 Mon Sep 17 00:00:00 2001
From: NullVoxPopuli <199018+NullVoxPopuli@users.noreply.github.com>
Date: Thu, 9 Apr 2026 18:17:48 -0400
Subject: [PATCH] fix: add waiter token to _flush so settled() waits for
 pending RAF
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Without this, settled() can return before a pending requestAnimationFrame
callback fires. This causes test failures with async data sources like
PromiseArrays — settled() finds no active waiter tokens during the gap
between render and promise resolution, so it returns early before items
are available.

The fix adds waiter.beginAsync() when scheduling the RAF in _flush(),
and waiter.endAsync() in flush() after all queued work completes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 src/index.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/index.js b/src/index.js
index ba027f6..72e7020 100644
--- a/src/index.js
+++ b/src/index.js
@@ -46,6 +46,7 @@ export class Scheduler {
     this.affect = [];
     this.jobs = 0;
     this._nextFlush = null;
+    this._flushToken = null;
     this.ticks = 0;
 
     if (macroCondition(isDevelopingApp())) {
@@ -80,6 +81,7 @@ export class Scheduler {
       return;
     }
 
+    this._flushToken = waiter.beginAsync();
     this._nextFlush = requestAnimationFrame(() => {
       this.flush();
     });
@@ -128,6 +130,7 @@ export class Scheduler {
     }
 
     this._nextFlush = null;
+    waiter.endAsync(this._flushToken);
     if (this.jobs > 0) {
       this._flush();
     }