chore: convert sw.js to typescript

src/index.d.ts

@@ -1,4 +1,5 @@
 declare module "*.svg";
+declare module "*.html";
 declare const __SW_NAME__: string;
 declare const __HELPER_PROXY__: string;
 declare const __GDRIVE_CLIENT_ID__: string;

src/sw.ts

@@ -4,10 +4,16 @@ import { SWReplay } from "@webrecorder/wabac/src/swmain";
 
 import { WorkerLoader } from "@webrecorder/wabac/src/loaders";
 
-if (self.registration) {
+type Self = Window &
+  typeof globalThis & {
+    registration: { scope: string };
+    sw: SWReplay;
+  };
+
+if ((self as Self).registration) {
   const staticData = new Map();
 
-  const prefix = self.registration.scope;
+  const prefix = (self as Self).registration.scope;
 
   staticData.set(prefix, { type: "text/html", content: INDEX_HTML });
   staticData.set(prefix + "index.html", {
@@ -17,13 +23,13 @@ if (self.registration) {
 
   const sp = new URLSearchParams(self.location.search);
 
-  const defaultConfig = {};
+  const defaultConfig: { injectScripts?: string[] } = {};
 
   if (sp.get("ruffle") == "1") {
     defaultConfig.injectScripts = ["ruffle/ruffle.js"];
   }
 
-  self.sw = new SWReplay({ staticData, defaultConfig });
+  (self as Self).sw = new SWReplay({ staticData, defaultConfig });
 } else {
   new WorkerLoader(self);
 }