diff --git a/src/platform/web/HTMLParseResult.js b/src/platform/web/HTMLParseResult.js
index 11ef1f0d..72a08ab7 100644
--- a/src/platform/web/HTMLParseResult.js
+++ b/src/platform/web/HTMLParseResult.js
@@ -4,15 +4,15 @@ export class HTMLParseResult {
     }
 
     get rootNodes() {
-        return this._bodyNode.childNodes;
+        return Array.from(this._bodyNode.childNodes);
     }
     
     getChildNodes(node) {
-        return node.childNodes;
+        return Array.from(node.childNodes);
     }
 
     getAttributeNames(node) {
-        return node.getAttributeNames();
+        return Array.from(node.getAttributeNames());
     }
 
     getAttributeValue(node, attr) {