From 5fda0113b921bd5d38051b8bd48de07e7d8b2383 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Tue, 24 Jun 2025 09:16:05 -0400
Subject: [PATCH] make batch.#deferred private

---
 .../svelte/src/internal/client/reactivity/batch.js     |  9 +++++++--
 packages/svelte/src/internal/client/runtime.js         | 10 ++--------
 2 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/packages/svelte/src/internal/client/reactivity/batch.js b/packages/svelte/src/internal/client/reactivity/batch.js
index b136dede07..13dc64026f 100644
--- a/packages/svelte/src/internal/client/reactivity/batch.js
+++ b/packages/svelte/src/internal/client/reactivity/batch.js
@@ -1,5 +1,6 @@
 /** @import { Derived, Effect, Source } from '#client' */
 import { CLEAN, DIRTY } from '#client/constants';
+import { deferred } from '../../shared/utils.js';
 import {
 	flush_queued_effects,
 	flush_queued_root_effects,
@@ -45,7 +46,7 @@ export class Batch {
 
 	/** @type {{ promise: Promise<void>, resolve: (value?: any) => void, reject: (reason: unknown) => void } | null} */
 	// TODO replace with Promise.withResolvers once supported widely enough
-	deferred = null;
+	#deferred = null;
 
 	/** @type {Effect[]} */
 	async_effects = [];
@@ -164,7 +165,7 @@ export class Batch {
 				flush_queued_effects(render_effects);
 				flush_queued_effects(effects);
 
-				this.deferred?.resolve();
+				this.#deferred?.resolve();
 			}
 		} else {
 			for (const e of this.render_effects) set_signal_status(e, CLEAN);
@@ -280,6 +281,10 @@ export class Batch {
 		return false;
 	}
 
+	settled() {
+		return (this.#deferred ??= deferred()).promise;
+	}
+
 	static ensure() {
 		if (current_batch === null) {
 			if (batches.size === 0) {
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index 3b6886467d..8c1d706fa5 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -1,12 +1,6 @@
 /** @import { Derived, Effect, Reaction, Signal, Source, Value } from '#client' */
 import { DEV } from 'esm-env';
-import {
-	deferred,
-	define_property,
-	get_descriptors,
-	get_prototype_of,
-	index_of
-} from '../shared/utils.js';
+import { define_property, get_descriptors, get_prototype_of, index_of } from '../shared/utils.js';
 import {
 	destroy_block_effect_children,
 	destroy_effect_children,
@@ -759,7 +753,7 @@ export async function tick() {
  * @returns {Promise<void>}
  */
 export function settled() {
-	return (Batch.ensure().deferred ??= deferred()).promise;
+	return Batch.ensure().settled();
 }
 
 /**