From 915997ce23f9a905a9eaf538af3da5645ba24c26 Mon Sep 17 00:00:00 2001
From: Ross Johnson <159597299+rosco54@users.noreply.github.com>
Date: Fri, 19 Jul 2024 14:24:19 +1000
Subject: [PATCH] Compute a yLowestValue and yHighestValue for each configured
 yaxis.

---
 src/modules/ZoomPanSelection.js | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/src/modules/ZoomPanSelection.js b/src/modules/ZoomPanSelection.js
index 89d80578e..652846e6b 100644
--- a/src/modules/ZoomPanSelection.js
+++ b/src/modules/ZoomPanSelection.js
@@ -559,16 +559,14 @@ export default class ZoomPanSelection extends Toolbar {
 
     w.config.yaxis.forEach((yaxe, index) => {
       // We can use the index of any series referenced by the Yaxis
-      // because they will all return the same value.
-      if (w.globals.seriesYAxisMap[index].length > 0) {
-        let seriesIndex = w.globals.seriesYAxisMap[index][0]
-        yHighestValue.push(
-          w.globals.yAxisScale[index].niceMax - xyRatios.yRatio[seriesIndex] * me.startY
-        )
-        yLowestValue.push(
-          w.globals.yAxisScale[index].niceMax - xyRatios.yRatio[seriesIndex] * me.endY
-        )
-      }
+      // because they will all return the same value, so we choose the first.
+      let seriesIndex = w.globals.seriesYAxisMap[index][0]
+      yHighestValue.push(
+        w.globals.yAxisScale[index].niceMax - xyRatios.yRatio[seriesIndex] * me.startY
+      )
+      yLowestValue.push(
+        w.globals.yAxisScale[index].niceMax - xyRatios.yRatio[seriesIndex] * me.endY
+      )
     })
 
     if (