From 62c75ab596220aedf3e3ae3b849fc9df7694acb4 Mon Sep 17 00:00:00 2001 From: Harshrj53 Date: Wed, 3 Dec 2025 16:59:44 +0530 Subject: [PATCH] Improve dev warning message for invalid useEffect usage during render --- packages/react-reconciler/src/ReactFiberHooks.js | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/packages/react-reconciler/src/ReactFiberHooks.js b/packages/react-reconciler/src/ReactFiberHooks.js index 66a390ebb81..9a4183304b5 100644 --- a/packages/react-reconciler/src/ReactFiberHooks.js +++ b/packages/react-reconciler/src/ReactFiberHooks.js @@ -3565,7 +3565,8 @@ function dispatchReducerAction( console.error( "State updates from the useState() and useReducer() Hooks don't support the " + 'second callback argument. To execute a side effect after ' + - 'rendering, declare it in the component body with useEffect().', + 'rendering, declare it inside the component function using useEffect(), not during render.', + ); } }