From 5bb89a631d64d85414484fa0af9ef2f35d0550b9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BE=9D=E7=91=AA=E8=B2=93?= <imacat@mail.imacat.idv.tw>
Date: Mon, 9 Mar 2026 16:31:29 +0800
Subject: [PATCH] Add early return in yTimeRange when yAmount <= 1 to prevent
 division by zero

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 src/module/setChartData.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/module/setChartData.js b/src/module/setChartData.js
index 797c6b5..23054c6 100644
--- a/src/module/setChartData.js
+++ b/src/module/setChartData.js
@@ -165,6 +165,7 @@ export function timeRange(minTime, maxTime, amount) {
  * @returns {Array<number>} An array of interpolated Y values.
  */
 export function yTimeRange(data, yAmount, yMax) {
+  if (yAmount <= 1) return data.map((d) => d.y);
   const yRange = [];
   const yGap = 1 / (yAmount - 1);