diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 749287a6a..62585736c 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -11501,8 +11501,12 @@ interface HTMLIFrameElement extends HTMLElement {
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLIFrameElement/height)
      */
     height: string;
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLIFrameElement/loading) */
-    loading: string;
+    /**
+     * Sets or retrieves the policy for loading iframe elements that are outside the viewport.
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLIFrameElement/loading)
+     */
+    loading: "eager" | "lazy";
     /**
      * Sets or retrieves a URI to a long description of the object.
      * @deprecated
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index f7cd2658c..0cb781559 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -11488,8 +11488,12 @@ interface HTMLIFrameElement extends HTMLElement {
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLIFrameElement/height)
      */
     height: string;
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLIFrameElement/loading) */
-    loading: string;
+    /**
+     * Sets or retrieves the policy for loading iframe elements that are outside the viewport.
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLIFrameElement/loading)
+     */
+    loading: "eager" | "lazy";
     /**
      * Sets or retrieves a URI to a long description of the object.
      * @deprecated
diff --git a/inputfiles/addedTypes.jsonc b/inputfiles/addedTypes.jsonc
index 3c2041999..18f695f4f 100644
--- a/inputfiles/addedTypes.jsonc
+++ b/inputfiles/addedTypes.jsonc
@@ -927,6 +927,10 @@
                     "property": {
                         "referrerPolicy": {
                             "type": "ReferrerPolicy"
+                        },
+                        "loading": {
+                            "name": "loading",
+                            "overrideType": "\"eager\" | \"lazy\""
                         }
                     }
                 }
diff --git a/inputfiles/comments.json b/inputfiles/comments.json
index 814a5f0ed..8386e9672 100644
--- a/inputfiles/comments.json
+++ b/inputfiles/comments.json
@@ -1015,6 +1015,9 @@
                         "contentDocument": {
                             "comment": "Retrieves the document object of the page or frame."
                         },
+                        "loading": {
+                            "comment": "Sets or retrieves the policy for loading iframe elements that are outside the viewport."
+                        },
                         "longDesc": {
                             "comment": "Sets or retrieves a URI to a long description of the object."
                         }