Fix type definition for route() with only options

src/js/index.d.ts

@@ -168,26 +168,29 @@ interface Router {
  */
 // Called with no arguments - returns a Router instance
 export function route(): Router;
+
+// Called with configuration arguments only - returns a configured Router instance
+export function route(
+    name: undefined,
+    params: undefined,
+    absolute?: boolean,
+    config?: Config,
+): Router;
+
 // Called with a route name and optional additional arguments - returns a URL string
 export function route<T extends RouteName>(
     name: T,
     params?: RouteParams<T> | undefined,
     absolute?: boolean,
     config?: Config,
 ): string;
+
 export function route<T extends RouteName>(
     name: T,
     params?: ParameterValue | undefined,
     absolute?: boolean,
     config?: Config,
 ): string;
-// Called with configuration arguments only - returns a configured Router instance
-export function route(
-    name: undefined,
-    params: undefined,
-    absolute?: boolean,
-    config?: Config,
-): Router;
 
 /**
  * Ziggy's Vue plugin.

tests/js/route.test-d.ts

@@ -1,5 +1,5 @@
 import { assertType } from 'vitest';
-import { route } from '../../src/js';
+import { Config, route, Router } from '../../src/js';
 
 // Add generated routes to use for testing inside this file. In a real app these declarations
 // would be in a separate file generated by running `php artisan ziggy:generate --types`.
@@ -97,3 +97,8 @@ assertType(route().current('posts.comments.show', { post: 2 }));
 assertType(route().current('posts.comments.show', 2));
 // assertType(route().current('posts.comments.show', [2])); // TODO shouldn't error, only one required param
 assertType(route().current('posts.comments.show', 'foo'));
+
+// Test route function return types
+assertType<string>(route('optional', { maybe: 'foo' }));
+assertType<string>(route('optional', 'foo'));
+assertType<Router>(route(undefined, undefined, undefined, {} as Config));