From 3ba6c6a4c2d893b2094792b9d480440d24dd11d3 Mon Sep 17 00:00:00 2001
From: umsangdon <umsangdon@gmail.com>
Date: Sat, 25 Jul 2026 13:40:25 +0900
Subject: [PATCH] 260725_3

---
 .../B06_wf3_ProfileCross_UI_Section_View.ts        | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/B06_wf3_ProfileCross/B06_wf3_ProfileCross_UI_Section_View.ts b/B06_wf3_ProfileCross/B06_wf3_ProfileCross_UI_Section_View.ts
index 0a050d95..54cea947 100644
--- a/B06_wf3_ProfileCross/B06_wf3_ProfileCross_UI_Section_View.ts
+++ b/B06_wf3_ProfileCross/B06_wf3_ProfileCross_UI_Section_View.ts
@@ -72,11 +72,12 @@ export function createSectionView(
   const cachedRowHeight = new Map<string, number>();
 
   const contentWidth = (): number => {
+    // 요소가 DOM 밖(detached)이면 computed padding이 ""라 parseFloat이 NaN을 만든다.
+    // NaN이 renderWidth로 흘러가면 종단 SVG 전 좌표가 NaN이 되므로 0으로 방어한다.
     const style = getComputedStyle(root);
-    return Math.max(
-      0,
-      root.clientWidth - parseFloat(style.paddingLeft) - parseFloat(style.paddingRight),
-    );
+    const pad = (value: string): number => Number.parseFloat(value) || 0;
+    const width = root.clientWidth - pad(style.paddingLeft) - pad(style.paddingRight);
+    return Number.isFinite(width) ? Math.max(0, width) : 0;
   };
 
   const selectStation = (stationId: string, scroll: boolean): void => {
@@ -107,7 +108,7 @@ export function createSectionView(
     );
 
   const draw = (): void => {
-    if (!currentDetail || renderWidth <= 0) return;
+    if (!currentDetail || !Number.isFinite(renderWidth) || renderWidth <= 0) return;
     root.replaceChildren();
     const detail = currentDetail;
     cachedYScale = calculateYScale(detail);
@@ -194,7 +195,8 @@ export function createSectionView(
 
   const resizeObserver = new ResizeObserver(() => {
     const nextWidth = contentWidth();
-    if (nextWidth <= 0 || Math.abs(nextWidth - renderWidth) < 1) return;
+    if (!Number.isFinite(nextWidth) || nextWidth <= 0 || Math.abs(nextWidth - renderWidth) < 1)
+      return;
     window.clearTimeout(resizeTimer);
     resizeTimer = window.setTimeout(() => {
       renderWidth = nextWidth;