function open() {
  return caches.open('lively4')
}

export function put(request, response) {
  return open().then((cache) => cache.put(request, response))
}

export function delete(request) {
  return open().then((cache) => cache.delete(request))
}

export function match(request) {
  return open().then((cache) => cache.match(request))
}

@@ -168,21 +168,20 @@
 unction 
-delet
+purg
 e(reques

Rename delete function of cache to purge because of keyword reasons