core: prevent attribute truncation side-effects

GoogleChrome · Oct 1, 2020 · 580f15f · 580f15f
1 parent ae69bd6
commit 580f15f
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lighthouse-core/lib/page-functions.js b/lighthouse-core/lib/page-functions.js
@@ -125,6 +125,9 @@ function getOuterHTMLSnippet(element, ignoreAttrs = [], snippetCharacterLimit =
     }
 
     const clone = element.cloneNode();
+    // prevent any potential side-effects by appending to a template element
+    const template = element.ownerDocument.createElement('template');
+    template.content.append(clone);
     ignoreAttrs.concat(autoFillIgnoreAttrs).forEach(attribute =>{
       clone.removeAttribute(attribute);
     });