From 786ea07d1975d921e10aeb58232842e13ac6e529 Mon Sep 17 00:00:00 2001
From: Tanner Linsley <tannerlinsley@gmail.com>
Date: Thu, 26 Jan 2023 14:42:17 -0700
Subject: [PATCH] fix: tooltip secondary axis stable sort

---
 src/components/Chart.tsx | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/components/Chart.tsx b/src/components/Chart.tsx
index 5590368..fb1691c 100644
--- a/src/components/Chart.tsx
+++ b/src/components/Chart.tsx
@@ -796,12 +796,14 @@ function sortDatumsBySecondaryPx<TDatum>(
     const bPx =
       bAxis?.scale(bAxis.stacked ? b.stackData?.[1] : b.secondaryValue) ?? NaN
 
-    return aPx > bPx
-      ? 1
-      : aPx < bPx
-      ? -1
-      : a.seriesIndex > b.seriesIndex
-      ? 1
-      : -1
+    if ((aAxis || bAxis)?.stacked) {
+      return a.seriesIndex > b.seriesIndex
+        ? 1
+        : a.seriesIndex < b.seriesIndex
+        ? -1
+        : 0
+    }
+
+    return aPx > bPx ? 1 : aPx < bPx ? -1 : 0
   })
 }