a

lib/uv.handler.js

@@ -17,6 +17,10 @@ async function __uvHook(window, config = {}, bare = '/bare/') {
         window,
     });
 
+    if (typeof config.construct === 'function') {
+        config.construct(__uv, worker ? 'worker' : 'window');
+    };
+
     const { client } = __uv;
     const {
         HTMLMediaElement,

lib/uv.sw-handler.js

@@ -1,6 +1,7 @@
 importScripts('./uv.sw.js');
 
 const sw = new UVServiceWorker();
+
 self.addEventListener('fetch', event =>
     event.respondWith(
         sw.fetch(event)

lib/uv.sw.js

@@ -54,6 +54,11 @@ class UVServiceWorker extends EventEmitter {
         try {
 
             const ultraviolet = new Ultraviolet(this.config);
+
+            if (typeof this.config.construct === 'function') {
+                this.config.construct(ultraviolet, 'service');
+            };
+
             const db = await ultraviolet.cookie.db();
 
             ultraviolet.meta.origin = location.origin;
@@ -105,6 +110,10 @@ class UVServiceWorker extends EventEmitter {
             };
 
             const responseCtx = new ResponseContext(requestCtx, response, this);
+            const resEvent = new HookEvent(responseCtx, null, null);
+
+            this.emit('beforemod', resEvent);
+            if (resEvent.intercepted) return resEvent.returnValue;
 
             for (const name of this.headers.csp) {
                 if (responseCtx.headers[name]) delete responseCtx.headers[name];
@@ -166,9 +175,7 @@ class UVServiceWorker extends EventEmitter {
                 responseCtx.headers['content-type'] = 'text/event-stream';
             };
 
-            const resEvent = new HookEvent(responseCtx, null, null);
             this.emit('response', resEvent);
-
             if (resEvent.intercepted) return resEvent.returnValue;
 
             return new Response(responseCtx.body, {