Enforce one nameing convention

AddCOI.js

@@ -0,0 +1,53 @@
+// Add cross-origin isolation (COI) into the page when the user visits it for the first time via a service worker and refreshing to apply the headers.
+// Taken, and modified from https://github.com/orgs/community/discussions/13309#discussioncomment-3844940
+if(typeof window === 'undefined') {
+  self.addEventListener("install", () => self.skipWaiting());
+  self.addEventListener("activate", e => e.waitUntil(self.clients.claim()));
+  async function handleFetch(request) {
+    if(request.cache === "only-if-cached" && request.mode !== "same-origin") return;
+    if(request.mode === "no-cors") { 
+      request = new Request(request.url, {
+        cache: request.cache,
+        credentials: "omit",
+        headers: request.headers,
+        integrity: request.integrity,
+        destination: request.destination,
+        keepalive: request.keepalive,
+        method: request.method,
+        mode: request.mode,
+        redirect: request.redirect,
+        referrer: request.referrer,
+        referrerPolicy: request.referrerPolicy,
+        signal: request.signal,
+      });
+    }
+    let r = await fetch(request).catch(e => console.error(e));
+    if(r.status === 0) {
+      return r;
+    }
+    const headers = new Headers(r.headers);
+    headers.set("Cross-Origin-Embedder-Policy", "require-corp"); 
+    headers.set("Cross-Origin-Opener-Policy", "same-origin");
+    return new Response(r.body, { status: r.status, statusText: r.statusText, headers });
+  }
+  
+  self.addEventListener("fetch", function(e) {
+    e.respondWith(handleFetch(e.request)); 
+  });   
+} else {
+  (async function() {
+    if(window.crossOriginIsolated !== false) return;
+
+    let registration = await navigator.serviceWorker.register(window.document.currentScript.src).catch(e => console.error("COOP/COEP Service Worker failed to register:", e));
+    if(registration) {
+
+      registration.addEventListener("updatefound", () => {
+        window.location.reload();
+      });
+
+      if(registration.active && !navigator.serviceWorker.controller) {
+        window.location.reload();
+      }
+    }
+  })();
+}