From b48b14257310f88cca769d27365659bcb8dc9a24 Mon Sep 17 00:00:00 2001
From: Paul Irish <paul.irish@gmail.com>
Date: Wed, 25 Apr 2018 13:08:29 -0700
Subject: [PATCH] report: only appendScoreScale to scoreHeader if it exists

---
 lighthouse-core/report/html/renderer/report-renderer.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lighthouse-core/report/html/renderer/report-renderer.js b/lighthouse-core/report/html/renderer/report-renderer.js
index 524c0d37fe29..a2226dffd0e8 100644
--- a/lighthouse-core/report/html/renderer/report-renderer.js
+++ b/lighthouse-core/report/html/renderer/report-renderer.js
@@ -171,8 +171,10 @@ class ReportRenderer {
       categories.appendChild(renderer.render(category, report.reportGroups));
     }
 
-    const scoreScale = this._dom.cloneTemplate('#tmpl-lh-scorescale', this._templateContext);
-    scoreHeader.appendChild(scoreScale);
+    if (scoreHeader) {
+      const scoreScale = this._dom.cloneTemplate('#tmpl-lh-scorescale', this._templateContext);
+      scoreHeader.appendChild(scoreScale);
+    }
 
     reportSection.appendChild(this._renderReportFooter(report));