ServiceWorker changes for auto update and edit event announcement.

index.html

@@ -94,23 +94,15 @@ <h1>Greater Knoxville</h1>
       <div class="col-md-12">
         <div class="alert alert-info alert-dismissible fade show" role=alert>
           <p>Come to our Climate Change Action Forum on Saturday, February 9th at 10 AM!
-            <a href="https://catwknoxvilletn.eventbrite.com/">Register here</a> to attend.</p>
+            <a href="https://catwknoxvilletn.eventbrite.com/">Register here</a> or e-mail
+            Chet Hunt at <a href="mailto:chunt51@comcast.net">chunt51@comcast.net</a> to attend.</p>
+            <div id=2019-feb-forum></div>
           <button type="button" class="close" data-dismiss="alert" aria-label="Close">
               <span aria-hidden="true">&times;</span>
             </button>
         </div>
       </div>
     </div>
-    <div class="row">
-        <div class="col-md-12">
-          <div class="alert alert-info alert-dismissible fade show" role=alert>
-            <div id=2019-feb-forum></div>
-            <button type="button" class="close" data-dismiss="alert" aria-label="Close">
-                <span aria-hidden="true">&times;</span>
-              </button>
-          </div>
-        </div>
-    </div>
 </div> <!-- Announcements -->
 
 <div id="main-container" class="container">

service-worker.js

@@ -13,6 +13,9 @@
 
 importScripts("https://storage.googleapis.com/workbox-cdn/releases/3.6.3/workbox-sw.js");
 
+workbox.skipWaiting();
+workbox.clientsClaim();
+
 /**
  * The workboxSW.precacheAndRoute() method efficiently caches and responds to
  * requests for URLs in the manifest.
@@ -29,11 +32,11 @@ self.__precacheManifest = [
   },
   {
     "url": "flyers/2019-Feb-Forum.html",
-    "revision": "66ce66d067fd11f40ba364ffc41821c6"
+    "revision": "1a686b54505bfd3ee3c9fc668deb4ae1"
   },
   {
     "url": "index.html",
-    "revision": "3551b33ef30eae00a9fb3453d6908dd9"
+    "revision": "7361f157253c6169fa939d70aa0ce799"
   },
   {
     "url": "manifest.json",
@@ -81,7 +84,7 @@ self.__precacheManifest = [
   },
   {
     "url": "workbox-config.js",
-    "revision": "1cf61e42906b92b4b4dd9d9554de7e3b"
+    "revision": "1148939bbcb945dae2bc4f1c856d5fa3"
   }
 ].concat(self.__precacheManifest || []);
 workbox.precaching.suppressWarnings();

workbox-config.js

@@ -22,5 +22,12 @@ module.exports = {
         maxEntries: 100,
       },
     },
-  }]
+  }],
+  // See https://developers.google.com/web/tools/workbox/modules/workbox-build#full_generatesw_config
+  // The following 2 options force kicking out the old ServiceWorker and activating the
+  // new one on all client tabs as soon as the new ServiceWorker is installed. It is an
+  // anti-pattern for PWAs in general (see https://redfin.engineering/how-to-fix-the-refresh-button-when-using-service-workers-a8e27af6df68),
+  // but for this simple "static" site I would rather users always see the latest content.
+  skipWaiting: true,
+  clientsClaim: true
 };