fix: Disable service worker in debug to work around service workers i…

…nterfering with browserlink

See https://developercommunity.visualstudio.com/t/BrowserLink-WebSocket-is-disconnecting-a/10500228

(cherry picked from commit d46feb7)

src/Uno.Wasm.Bootstrap/WasmScripts/service-worker.js

@@ -1,41 +1,51 @@
 import { config } from "$(REMOTE_WEBAPP_PATH)$(REMOTE_BASE_PATH)/uno-config.js";
 
-console.debug("[ServiceWorker] Initializing");
+if (config.environmentVariables["UNO_BOOTSTRAP_DEBUGGER_ENABLED"] !== "True") {
+    console.debug("[ServiceWorker] Initializing");
 
-self.addEventListener('install', function (e) {
-    console.debug('[ServiceWorker] Installing offline worker');
-    e.waitUntil(
-        caches.open('$(CACHE_KEY)').then(async function (cache) {
-            console.debug('[ServiceWorker] Caching app binaries and content');
+    self.addEventListener('install', function (e) {
+        console.debug('[ServiceWorker] Installing offline worker');
+        e.waitUntil(
+            caches.open('$(CACHE_KEY)').then(async function (cache) {
+                console.debug('[ServiceWorker] Caching app binaries and content');
 
-            // Add files one by one to avoid failed downloads to prevent the
-            // worker to fail installing.
-            for (var i = 0; i < config.offline_files.length; i++) {
-                try {
-                    await cache.add(config.offline_files[i]);
+                // Add files one by one to avoid failed downloads to prevent the
+                // worker to fail installing.
+                for (var i = 0; i < config.offline_files.length; i++) {
+                    try {
+                        await cache.add(config.offline_files[i]);
+                    }
+                    catch (e) {
+                        console.debug(`[ServiceWorker] Failed to fetch ${config.offline_files[i]}`);
+                    }
                 }
-                catch (e) {
-                    console.debug(`[ServiceWorker] Failed to fetch ${config.offline_files[i]}`);
-                }
-            }
-        })
-    );
-});
+            })
+        );
+    });
 
-self.addEventListener('activate', event => {
-    event.waitUntil(self.clients.claim());
-});
+    self.addEventListener('activate', event => {
+        event.waitUntil(self.clients.claim());
+    });
 
-self.addEventListener('fetch', event => {
-    event.respondWith(async function () {
-        try {
-            // Network first mode to get fresh content every time, then fallback to
-            // cache content if needed.
-            return await fetch(event.request);
-        } catch (err) {
-            return caches.match(event.request).then(response => {
-                return response || fetch(event.request);
-            });
-        }
-    }());
-});
+    self.addEventListener('fetch', event => {
+        event.respondWith(async function () {
+            try {
+                // Network first mode to get fresh content every time, then fallback to
+                // cache content if needed.
+                return await fetch(event.request);
+            } catch (err) {
+                return caches.match(event.request).then(response => {
+                    return response || fetch(event.request);
+                });
+            }
+        }());
+    });
+}
+else {
+    // In development, always fetch from the network and do not enable offline support.
+    // This is because caching would make development more difficult (changes would not
+    // be reflected on the first load after each change).
+    // It also breaks the hot reload feature because VS's browserlink is not always able to
+    // inject its own framework in the served scripts and pages.
+    self.addEventListener('fetch', () => { });
+}