From 540f6e5852e0713937483e264f2ddef6b29a46f7 Mon Sep 17 00:00:00 2001
From: Dave Lawrence <davmlaw@gmail.com>
Date: Thu, 11 Jun 2026 12:13:51 +0930
Subject: [PATCH] Guard against undefined PanelApp evidence entries #1597

The gene grid PanelApp integration iterated over the evidence results
list and read confidence_level (via addGeneEvidence and getConfidenceCSS)
on each entry. When an entry was undefined, this threw
"TypeError: Cannot read properties of undefined (reading 'confidence_level')".

Skip falsy entries in the results loop so missing entries are ignored
instead of crashing the hover-card rendering.
---
 variantgrid/static_files/default_static/js/panel_app.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/variantgrid/static_files/default_static/js/panel_app.js b/variantgrid/static_files/default_static/js/panel_app.js
index cb4102eb6..fc5a5d9fa 100644
--- a/variantgrid/static_files/default_static/js/panel_app.js
+++ b/variantgrid/static_files/default_static/js/panel_app.js
@@ -66,6 +66,9 @@ function getDivFromPanelAppGeneEvidenceAPIResult(geneSymbol, panelAppEvidenceRes
         let confidenceCount = {};
         for (let i=0 ; i<panelAppEvidenceResultsList.length ; ++i) {
             let evidence = panelAppEvidenceResultsList[i];
+            if (!evidence) {
+                continue;
+            }
             addGeneEvidence(geneSymbol, evidence, newDiv);
 
             let panel = evidence["panel"];