released v4.0.27 - fixed toUpperCase serialization issue

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## Changelog
 
+- **v4.0.27**
+  - fixed: .toUpperCase issue that prevented serialization of entire router
 - **v4.0.24**
   - fixed: createResponse(undefined) should return undefined (not a Response)
 - **v4.1.0**

package.json

@@ -1,6 +1,6 @@
 {
   "name": "itty-router",
-  "version": "4.0.26",
+  "version": "4.0.27",
   "description": "A tiny, zero-dependency router, designed to make beautiful APIs in any environment.",
   "main": "./index.js",
   "module": "./index.mjs",

src/Router.spec.ts

@@ -51,6 +51,12 @@ describe('Router', () => {
     expect(router.routes.length).toBe(3) // accessible off the main router
   })
 
+  it('can serialize router without throwing', () => {
+    const router = Router().get('/', () => 'foo')
+
+    expect(() => console.log(router)).not.toThrow()
+  })
+
   it('router.handle (legacy) is an alias for router.fetch (new)', () => {
     expect(router.fetch).toBe(router.handle)
   })

src/Router.ts

@@ -88,7 +88,7 @@ export const Router = <
         (route: string, ...handlers: RouteHandler<I>[]) =>
           routes.push(
             [
-              prop.toUpperCase(),
+              prop.toUpperCase?.(),
               RegExp(`^${(path = (base + route)
                 .replace(/\/+(\/|$)/g, '$1'))                       // strip double & trailing splash
                 .replace(/(\/?\.?):(\w+)\+/g, '($1(?<$2>*))')       // greedy params