From 9412c5861c365610d7c6c0e4ecd3572ac3fe5860 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 21 Jul 2025 22:17:25 -0400
Subject: [PATCH] chore: log effect functions in log_effect_tree (#16468)

---
 packages/svelte/src/internal/client/dev/debug.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/svelte/src/internal/client/dev/debug.js b/packages/svelte/src/internal/client/dev/debug.js
index c47080ed2f..2714a3af1f 100644
--- a/packages/svelte/src/internal/client/dev/debug.js
+++ b/packages/svelte/src/internal/client/dev/debug.js
@@ -63,6 +63,13 @@ export function log_effect_tree(effect, depth = 0) {
 
 		// eslint-disable-next-line no-console
 		console.log(callsite);
+	} else {
+		// eslint-disable-next-line no-console
+		console.groupCollapsed(`%cfn`, `font-weight: normal`);
+		// eslint-disable-next-line no-console
+		console.log(effect.fn);
+		// eslint-disable-next-line no-console
+		console.groupEnd();
 	}
 
 	if (effect.deps !== null) {