fix(router): check properly the debug mode for logging navigation events

src/router.js

@@ -1,7 +1,14 @@
 import * as cache from "./cache.js";
-import { deferred, dispatch, walkInShadow, debug } from "./utils.js";
 import { constructors } from "./define.js";
 
+import {
+  deferred,
+  dispatch,
+  walkInShadow,
+  debug,
+  isDebugMode,
+} from "./utils.js";
+
 const connect = Symbol("router.connect");
 const configs = new WeakMap();
 
@@ -1139,7 +1146,7 @@ function router(views, options) {
       return connectRootRouter(host, invalidate, options);
     },
     observe:
-      debug &&
+      isDebugMode() &&
       ((host, value, lastValue) => {
         const index = value.length - 1;
         const view = value[index];

src/utils.js

@@ -44,13 +44,13 @@ export function walkInShadow(target, cb) {
 }
 
 let debugMode = false;
-export function debug() {
-  debugMode = true;
-}
-
 export function isDebugMode() {
   return debugMode;
 }
 
+export function debug() {
+  debugMode = true;
+}
+
 export const deferred = Promise.resolve();
 export const storePointer = new WeakMap();