diff --git a/service-worker.js b/service-worker.js
new file mode 100644
index 0000000..dca9424
--- /dev/null
+++ b/service-worker.js
@@ -0,0 +1,9 @@
+self.addEventListener('install', function() {
+  console.log('Install!');
+});
+self.addEventListener("activate", event => {
+  console.log('Activate!');
+});
+self.addEventListener('fetch', function(event) {
+  console.log('Fetch!', event.request);
+});