From caf62ee6872fc0c9944aea98585597d2d1712e21 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Tue, 8 Apr 2025 07:20:36 -0400
Subject: [PATCH] fix: allow `$.state` and `$.derived` to be treeshaken
 (#15702)

---
 .changeset/clever-news-enjoy.md                            | 5 +++++
 packages/svelte/src/internal/client/reactivity/deriveds.js | 1 +
 packages/svelte/src/internal/client/reactivity/sources.js  | 1 +
 3 files changed, 7 insertions(+)
 create mode 100644 .changeset/clever-news-enjoy.md

diff --git a/.changeset/clever-news-enjoy.md b/.changeset/clever-news-enjoy.md
new file mode 100644
index 0000000000..2ff3dcbe56
--- /dev/null
+++ b/.changeset/clever-news-enjoy.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: allow `$.state` and `$.derived` to be treeshaken
diff --git a/packages/svelte/src/internal/client/reactivity/deriveds.js b/packages/svelte/src/internal/client/reactivity/deriveds.js
index cd7bbba02f..86171c2b2d 100644
--- a/packages/svelte/src/internal/client/reactivity/deriveds.js
+++ b/packages/svelte/src/internal/client/reactivity/deriveds.js
@@ -67,6 +67,7 @@ export function derived(fn) {
  * @param {() => V} fn
  * @returns {Derived<V>}
  */
+/*#__NO_SIDE_EFFECTS__*/
 export function user_derived(fn) {
 	const d = derived(fn);
 
diff --git a/packages/svelte/src/internal/client/reactivity/sources.js b/packages/svelte/src/internal/client/reactivity/sources.js
index e4834902fe..ceab59b37c 100644
--- a/packages/svelte/src/internal/client/reactivity/sources.js
+++ b/packages/svelte/src/internal/client/reactivity/sources.js
@@ -78,6 +78,7 @@ export function source(v, stack) {
  * @param {V} v
  * @param {Error | null} [stack]
  */
+/*#__NO_SIDE_EFFECTS__*/
 export function state(v, stack) {
 	const s = source(v, stack);