And then?

Author: Daltz333

source/_extensions/pwa_service_files/sw.js

@@ -6,7 +6,7 @@ self.addEventListener('install', function(e) {
     e.waitUntil(
         caches.open('frc-docs').then(function(cache) {
             fetch('_static/cache.json')
-                .then(response => {return cache.addAll(response.json())})
+                .then(response => response.json().then(data => cache.addAll(data)))
                 .catch(error => {
                     console.error(error);
             });