Add loading attribute for HTMLIframeElement

Author: 1000ch

inputfiles/addedTypes.jsonc

@@ -732,6 +732,10 @@
                     "property": {
                         "referrerPolicy": {
                             "type": "ReferrerPolicy"
+                        },
+                        "loading": {
+                            "name": "loading",
+                            "overrideType": "\"eager\" | \"lazy\""
                         }
                     }
                 }

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."
                         }