report: only appendScoreScale to scoreHeader if it exists (GoogleChro…

…me#5040)
kdzwinel · Aug 16, 2018 · 8920b20 · 8920b20
1 parent e39133b
commit 8920b20
Showing 1 changed file with 4 additions and 2 deletions.
diff --git 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));