mdn
diff --git a/Diff for: ‎api/ErrorEvent.json
+1 b/Diff for: ‎api/ErrorEvent.json
+1
diff --git a/Diff for: ‎package-lock.json
+3-3 b/Diff for: ‎package-lock.json
+3-3
@@ -46,6 +46,7 @@
       "ErrorEvent": {
         "__compat": {
           "description": "<code>ErrorEvent()</code> constructor",
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/ErrorEvent/ErrorEvent",
           "spec_url": "https://html.spec.whatwg.org/multipage/webappapis.html#errorevent",
           "support": {
             "chrome": {