diff --git a/draftlogs/6996_fix.md b/draftlogs/6996_fix.md
new file mode 100644
index 00000000000..df2298d7d12
--- /dev/null
+++ b/draftlogs/6996_fix.md
@@ -0,0 +1,2 @@
+- Fix `getFullTransformMatrix` in shadow DOM [[#6996](https://github.com/plotly/plotly.js/pull/6996)],
+  with thanks to @OpportunityLiu for the contribution!
diff --git a/src/lib/dom.js b/src/lib/dom.js
index 08c8ee6b20b..6ed44293ea9 100644
--- a/src/lib/dom.js
+++ b/src/lib/dom.js
@@ -134,6 +134,9 @@ function getElementAndAncestors(element) {
     while(isTransformableElement(element)) {
         allElements.push(element);
         element = element.parentNode;
+        if(typeof ShadowRoot === 'function' && element instanceof ShadowRoot) {
+            element = element.host;
+        }
     }
     return allElements;
 }