diff --git a/src/service-worker/index.js b/src/service-worker/index.js
new file mode 100644
index 0000000..b7e92f8
--- /dev/null
+++ b/src/service-worker/index.js
@@ -0,0 +1,6 @@
+/// <reference types="@sveltejs/kit" />
+/// <reference no-default-lib="true"/>
+/// <reference lib="esnext" />
+/// <reference lib="webworker" />
+
+const sw = /** @type {ServiceWorkerGlobalScope} */ (/** @type {unknown} */ (self));