lint

packages/svelte/src/internal/client/reactivity/batch.js

@@ -39,7 +39,8 @@ export class Batch {
 
 	#pending = 0;
 
-	/** @type {PromiseWithResolvers<void> | null} */
+	/** @type {{ promise: Promise<void>, resolve: (value?: any) => void, reject: (reason: unknown) => void } | null} */
+	// TODO replace with Promise.withResolvers once supported widely enough
 	deferred = null;
 
 	/** @type {Effect[]} */

packages/svelte/src/internal/client/runtime.js

@@ -1,6 +1,12 @@
 /** @import { ComponentContext, Derived, Effect, Reaction, Signal, Source, Value } from '#client' */
 import { DEV } from 'esm-env';
-import { define_property, get_descriptors, get_prototype_of, index_of } from '../shared/utils.js';
+import {
+	deferred,
+	define_property,
+	get_descriptors,
+	get_prototype_of,
+	index_of
+} from '../shared/utils.js';
 import {
 	destroy_block_effect_children,
 	destroy_effect_children,
@@ -893,7 +899,7 @@ export async function tick() {
  * @returns {Promise<void>}
  */
 export function settled() {
-	return (Batch.ensure().deferred ??= Promise.withResolvers()).promise;
+	return (Batch.ensure().deferred ??= deferred()).promise;
 }
 
 /**