Update GraphQLFormattedError (#36205)

types/graphql/error/formatError.d.ts

@@ -7,9 +7,33 @@ import { SourceLocation } from "../language/location";
  */
 export function formatError(error: GraphQLError): GraphQLFormattedError;
 
-export interface GraphQLFormattedError {
-    readonly message: string;
-    readonly locations: ReadonlyArray<SourceLocation> | undefined;
-    readonly path: ReadonlyArray<string | number> | undefined;
-    readonly extensions?: { [key: string]: any };
+/**
+ * @see https://github.com/graphql/graphql-spec/blob/master/spec/Section%207%20--%20Response.md#errors
+ */
+export interface GraphQLFormattedError<
+    TExtensions extends Record<string, any> = Record<string, any>
+> {
+    /**
+	 * A short, human-readable summary of the problem that **SHOULD NOT** change
+	 * from occurrence to occurrence of the problem, except for purposes of
+	 * localization.
+	 */
+	readonly message: string
+    /**
+	 * If an error can be associated to a particular point in the requested
+	 * GraphQL document, it should contain a list of locations.
+	 */
+	readonly locations?: ReadonlyArray<SourceLocation>
+    /**
+	 * If an error can be associated to a particular field in the GraphQL result,
+	 * it _must_ contain an entry with the key `path` that details the path of
+	 * the response field which experienced the error. This allows clients to
+	 * identify whether a null result is intentional or caused by a runtime error.
+	 */
+	readonly path?: ReadonlyArray<string | number>
+    /**
+	 * Reserved for implementors to extend the protocol however they see fit,
+	 * and hence there are no additional restrictions on its contents.
+	 */
+    readonly extensions?: TExtensions
 }

types/graphql/index.d.ts

@@ -19,6 +19,7 @@
 //                 Pavel Lang <https://github.com/langpavel>
 //                 Mark Caudill <https://github.com/mc0>
 //                 Martijn Walraven <https://github.com/martijnwalraven>
+//                 Jed Mao <https://github.com/jedmao>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.6