From ee3a02aa504f75ab7bdd02288b88af5b4c0eaa32 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 7 Jul 2025 21:20:22 -0400
Subject: [PATCH] tidy up

---
 .../svelte/src/internal/client/reactivity/deriveds.js |  7 +++----
 .../svelte/src/internal/client/reactivity/effects.js  | 11 ++++++++++-
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/packages/svelte/src/internal/client/reactivity/deriveds.js b/packages/svelte/src/internal/client/reactivity/deriveds.js
index 1fd23f6d3f..aece8f427c 100644
--- a/packages/svelte/src/internal/client/reactivity/deriveds.js
+++ b/packages/svelte/src/internal/client/reactivity/deriveds.js
@@ -6,7 +6,6 @@ import {
 	CLEAN,
 	DERIVED,
 	DIRTY,
-	EFFECT_ASYNC,
 	EFFECT_PRESERVED,
 	MAYBE_DIRTY,
 	STALE_REACTION,
@@ -26,7 +25,7 @@ import {
 import { equals, safe_equals } from './equality.js';
 import * as e from '../errors.js';
 import * as w from '../warnings.js';
-import { destroy_effect, render_effect } from './effects.js';
+import { async_effect, destroy_effect, render_effect } from './effects.js';
 import { inspect_effects, internal_set, set_inspect_effects, source } from './sources.js';
 import { get_stack } from '../dev/tracing.js';
 import { tracing_mode_flag } from '../../flags/index.js';
@@ -114,7 +113,7 @@ export function async_derived(fn, location) {
 	// only suspend in async deriveds created on initialisation
 	var should_suspend = !active_reaction;
 
-	render_effect(() => {
+	async_effect(() => {
 		if (DEV) current_async_effect = active_effect;
 
 		try {
@@ -187,7 +186,7 @@ export function async_derived(fn, location) {
 		};
 
 		promise.then(handler, (e) => handler(null, e || 'unknown'));
-	}, EFFECT_ASYNC | EFFECT_PRESERVED);
+	});
 
 	return new Promise((fulfil) => {
 		/** @param {Promise<V>} p */
diff --git a/packages/svelte/src/internal/client/reactivity/effects.js b/packages/svelte/src/internal/client/reactivity/effects.js
index 747ef8e820..a91b739d5f 100644
--- a/packages/svelte/src/internal/client/reactivity/effects.js
+++ b/packages/svelte/src/internal/client/reactivity/effects.js
@@ -33,7 +33,8 @@ import {
 	EFFECT_PRESERVED,
 	BOUNDARY_EFFECT,
 	STALE_REACTION,
-	USER_EFFECT
+	USER_EFFECT,
+	EFFECT_ASYNC
 } from '#client/constants';
 import * as e from '../errors.js';
 import { DEV } from 'esm-env';
@@ -331,6 +332,14 @@ export function legacy_pre_effect_reset() {
 	});
 }
 
+/**
+ * @param {() => void | (() => void)} fn
+ * @returns {Effect}
+ */
+export function async_effect(fn) {
+	return create_effect(EFFECT_ASYNC | EFFECT_PRESERVED, fn, true);
+}
+
 /**
  * @param {() => void | (() => void)} fn
  * @returns {Effect}