From 9573fca9335e30dc984c313ac5d6d205186a8bab Mon Sep 17 00:00:00 2001
From: John Doknjas <jdoknjas@sfu.ca>
Date: Tue, 10 Dec 2024 06:16:01 +0000
Subject: [PATCH] Check if a ply is not NaN before jumping to it.

---
 ui/round/src/view/replay.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ui/round/src/view/replay.ts b/ui/round/src/view/replay.ts
index 4d875b8d22538..9ecdf6a20f459 100644
--- a/ui/round/src/view/replay.ts
+++ b/ui/round/src/view/replay.ts
@@ -52,7 +52,7 @@ const renderMove = (step: Step, curPly: number, orEmpty: boolean, drawOffers: Se
     : orEmpty && h(moveTag, '…');
 
 const goToPly = (ctrl: RoundController, ply: number) => {
-  ctrl.userJump(ply);
+  if (!isNaN(ply)) ctrl.userJump(ply);
   ctrl.redraw();
 };
 
@@ -204,6 +204,7 @@ function initMessage(ctrl: RoundController) {
 }
 
 const col1Button = (ctrl: RoundController, dir: number, icon: string, disabled: boolean) =>
+  // todo: update the stuff for mobile (in vertical mode) here:
   h('button.fbt', {
     attrs: { disabled: disabled, 'data-icon': icon, 'data-ply': ctrl.ply + dir },
     hook: bind('mousedown', e => {