From dbc31d6dc9fa88007c1281f4e44390282fcd5431 Mon Sep 17 00:00:00 2001
From: Mfoncho AC <2p4b@proton.me>
Date: Fri, 3 Jan 2025 19:56:55 -0600
Subject: [PATCH] Update adding-interactivity.md

Declare interval variable timer before use.
---
 docs/latest/getting-started/adding-interactivity.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/latest/getting-started/adding-interactivity.md b/docs/latest/getting-started/adding-interactivity.md
index c9614d8f05d..14477511127 100644
--- a/docs/latest/getting-started/adding-interactivity.md
+++ b/docs/latest/getting-started/adding-interactivity.md
@@ -43,7 +43,8 @@ export default function Countdown(props: { target: string }) {
   // Set up an interval to update the `now` date every second with the current
   // date as long as the component is mounted.
   useEffect(() => {
-    const timer = setInterval(() => {
+    let timer: number = -1;
+    timer = setInterval(() => {
       if (now.value > target) {
         clearInterval(timer);
       }