Modularized, fixed SuperCafe's table

dist/pwa.js

@@ -0,0 +1,43 @@
+let newWorker;
+
+function showUpdateBar() {
+  let snackbar = document.getElementById("snackbar");
+  snackbar.className = "show";
+}
+
+// The click event on the pop up notification
+document.getElementById("reload").addEventListener("click", function () {
+  setTimeout(() => {
+    removeCache();
+  }, 1000);
+  newWorker.postMessage({ action: "skipWaiting" });
+});
+
+if ("serviceWorker" in navigator) {
+  navigator.serviceWorker.register("/sw.js").then((reg) => {
+    reg.addEventListener("updatefound", () => {
+      // A wild service worker has appeared in reg.installing!
+      newWorker = reg.installing;
+
+      newWorker.addEventListener("statechange", () => {
+        // Has network.state changed?
+        switch (newWorker.state) {
+          case "installed":
+            if (navigator.serviceWorker.controller) {
+              // new update available
+              showUpdateBar();
+            }
+            // No update available
+            break;
+        }
+      });
+    });
+  });
+
+  let refreshing;
+  navigator.serviceWorker.addEventListener("controllerchange", function () {
+    if (refreshing) return;
+    window.location.reload();
+    refreshing = true;
+  });
+}