chore: override OnErrorEventHandlerNonNull

baselines/dom.generated.d.ts

@@ -10858,6 +10858,7 @@ interface HTMLElement extends Element, ElementCSSInlineStyle, ElementContentEdit
     readonly offsetTop: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/offsetWidth) */
     readonly offsetWidth: number;
+    onerror: (event: Event) => void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/outerText) */
     outerText: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/popover) */

baselines/ts5.5/dom.generated.d.ts

@@ -10846,6 +10846,7 @@ interface HTMLElement extends Element, ElementCSSInlineStyle, ElementContentEdit
     readonly offsetTop: number;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/offsetWidth) */
     readonly offsetWidth: number;
+    onerror: (event: Event) => void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/outerText) */
     outerText: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/HTMLElement/popover) */

inputfiles/addedTypes.jsonc

@@ -1287,6 +1287,16 @@
                         }
                     }
                 }
+            },
+            "HTMLElement": {
+                "properties": {
+                    "property": {
+                        "onerror": {
+                            "name": "onerror",
+                            "overrideType": "(event: Event) => void"
+                        }
+                    }
+                }
             }
         }
     },

unittests/files/onerror.ts

@@ -0,0 +1,8 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
+/* eslint-disable no-var */
+// this should not show error
+window.onerror = (_message, _source, _lineno, _colno, _error) => {};
+
+// this also should not show error
+declare var img: HTMLImageElement;
+img.onerror = (_event: Event) => {};