Updated type of action parameter for DataSnapshot#forEach

Author: rhodgkins

packages/database-compat/src/api/Reference.ts

@@ -164,7 +164,7 @@ export class DataSnapshot implements Compat<ModularDataSnapshot> {
    * @returns True if forEach was canceled by action returning true for
    * one of the child nodes.
    */
-  forEach(action: (snapshot: DataSnapshot) => boolean | void): boolean {
+  forEach(action: (snapshot: DataSnapshot & { key: string }) => boolean | void): boolean {
     validateArgCount('DataSnapshot.forEach', 1, 1, arguments.length);
     validateCallback('DataSnapshot.forEach', 'action', action, false);
     return this._delegate.forEach(expDataSnapshot =>

packages/database-types/index.d.ts

@@ -22,7 +22,7 @@ export interface DataSnapshot {
   child(path: string): DataSnapshot;
   exists(): boolean;
   exportVal(): any;
-  forEach(action: (a: DataSnapshot) => boolean | void): boolean;
+  forEach(action: (a: DataSnapshot & { key: string }) => boolean | void): boolean;
   getPriority(): string | number | null;
   hasChild(path: string): boolean;
   hasChildren(): boolean;

packages/database/src/api/Reference_impl.ts

@@ -394,7 +394,7 @@ export class DataSnapshot {
    * @returns true if enumeration was canceled due to your callback returning
    * true.
    */
-  forEach(action: (child: DataSnapshot) => boolean | void): boolean {
+  forEach(action: (child: DataSnapshot & { key: string }) => boolean | void): boolean {
     if (this._node.isLeafNode()) {
       return false;
     }

packages/firebase/compat/index.d.ts

@@ -5819,7 +5819,7 @@ declare namespace firebase.database {
      *   returning true.
      */
     forEach(
-      action: (a: firebase.database.DataSnapshot) => boolean | void
+      action: (a: firebase.database.DataSnapshot & { key: string }) => boolean | void
     ): boolean;
     /**
      * Gets the priority value of the data in this `DataSnapshot`.