Merge pull request #348 from YuichiNukiyama/fix_20977

change getAttributeNode and getAttributeNodeNS

Author: mhegazy

baselines/dom.generated.d.ts

@@ -3596,8 +3596,8 @@ interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelec
     slot: string;
     readonly shadowRoot: ShadowRoot | null;
     getAttribute(name: string): string | null;
-    getAttributeNode(name: string): Attr;
-    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
+    getAttributeNode(name: string): Attr | null;
+    getAttributeNodeNS(namespaceURI: string, localName: string): Attr | null;
     getAttributeNS(namespaceURI: string, localName: string): string;
     getBoundingClientRect(): ClientRect;
     getClientRects(): ClientRectList;

inputfiles/overridingTypes.json

@@ -1755,5 +1755,21 @@
         "signatures": [
             "setSelectionRange(start: number, end: number, direction?: \"forward\" | \"backward\" | \"none\"): void"
         ]
+    },
+    {
+        "kind": "method",
+        "interface": "Element",
+        "name": "getAttributeNodeNS",
+        "signatures": [
+            "getAttributeNodeNS(namespaceURI: string, localName: string): Attr | null"
+        ]
+    },
+    {
+        "kind": "method",
+        "interface": "Element",
+        "name": "getAttributeNode",
+        "signatures": [
+            "getAttributeNode(name: string): Attr | null"
+        ]
     }
 ]