From c7f1af95473f67960c2752442ee1e5d2c6dfb5c8 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Fri, 15 Oct 2021 16:55:40 -0400
Subject: [PATCH] Fix regression in DOM inspector

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1765

Related commit:
- https://github.com/gorhill/uBlock/commit/1285f78e0597241a2d186c00227c15f4e83ed9ec#diff-77e1325098616e4d2bb6b1e9ccf3b7cb9898942739e29f01b63346220f55b2b8L250-R250
---
 src/js/scriptlets/dom-inspector.js | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/js/scriptlets/dom-inspector.js b/src/js/scriptlets/dom-inspector.js
index d1d7d1693..c1edb90f4 100644
--- a/src/js/scriptlets/dom-inspector.js
+++ b/src/js/scriptlets/dom-inspector.js
@@ -232,7 +232,7 @@ const domLayout = (function() {
     };
 
     const domNodeFactory = function(level, node) {
-        var localName = node.localName;
+        const localName = node.localName;
         if ( skipTagNames.has(localName) ) { return null; }
         // skip uBlock's own nodes
         if ( node.classList.contains(sessionId) ) { return null; }
@@ -245,14 +245,14 @@ const domLayout = (function() {
     // Collect layout data.
 
     const getLayoutData = function() {
-        var layout = [];
-        var stack = [];
-        var node = document;
-        var domNode;
-        var lvl = 0;
+        const layout = [];
+        const stack = [];
+        let lvl = 0;
+        let node = document.documentElement;
+        if ( node === null ) { return layout; }
 
         for (;;) {
-            domNode = domNodeFactory(lvl, node);
+            const domNode = domNodeFactory(lvl, node);
             if ( domNode !== null ) {
                 layout.push(domNode);
             }