Merge pull request #10398 from Snuffleupagus/issue-10395

Prevent errors in various methods in `SimpleDOMNode` when the `childNodes` property is not defined (issue 10395)
mozilla · Jan 1, 2019 · 1b84b2e · 1b84b2e
2 parents d8f201e + d371d23
commit 1b84b2e
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/src/display/xml_parser.js b/src/display/xml_parser.js
@@ -278,12 +278,16 @@ class SimpleDOMNode {
   }
 
   get firstChild() {
-    return this.childNodes[0];
+    return this.childNodes && this.childNodes[0];
   }
 
   get nextSibling() {
-    let index = this.parentNode.childNodes.indexOf(this);
-    return this.parentNode.childNodes[index + 1];
+    const childNodes = this.parentNode.childNodes;
+    if (!childNodes) {
+      return undefined;
+    }
+    const index = childNodes.indexOf(this);
+    return childNodes[index + 1];
   }
 
   get textContent() {