1 files changed, 23 insertions, 0 deletions
diff --git a/dom/base/Element.h b/dom/base/Element.h
index ce84b74fb..6d8bc823e 100644
--- a/dom/base/Element.h
+++ b/dom/base/Element.h
@@ -390,6 +390,29 @@ public:
 
   Directionality GetComputedDirectionality() const;
 
+  /**
+   * Gets the custom element data used by web components custom element.
+   * Custom element data is created at the first attempt to enqueue a callback.
+   *
+   * @return The custom element data or null if none.
+   */
+  inline CustomElementData* GetCustomElementData() const
+  {
+    nsDOMSlots *slots = GetExistingDOMSlots();
+    if (slots) {
+      return slots->mCustomElementData;
+    }
+    return nullptr;
+  }
+
+  /**
+   * Sets the custom element data, ownership of the
+   * callback data is taken by this element.
+   *
+   * @param aData The custom element data.
+   */
+  void SetCustomElementData(CustomElementData* aData);
+
 protected:
   /**
    * Method to get the _intrinsic_ content state of this element.  This is the