From 0744081bb49d3558573a00d459078b72e9168263 Mon Sep 17 00:00:00 2001
From: Pranav Yadav <Pranavyadav3912@gmail.com>
Date: Sat, 23 Oct 2021 16:04:46 +0530
Subject: [PATCH] =?UTF-8?q?Added=20serviceworker.js=20=F0=9F=91=A8?=
 =?UTF-8?q?=E2=80=8D=F0=9F=94=A7=E2=9A=99?=
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- 🛠
- 🔧
- 🗜
---
 public/serviceworker.js | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 public/serviceworker.js

diff --git a/public/serviceworker.js b/public/serviceworker.js
new file mode 100644
index 0000000..9bd153e
--- /dev/null
+++ b/public/serviceworker.js
@@ -0,0 +1,41 @@
+const CACHE_NAME = "version-1";
+const urlsToCache = ["index.html", "offline.html"];
+
+// Install SW
+self.addEventListener("install", (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => {
+      console.log("Opened cache");
+      return cache.addAll(urlsToCache);
+    })
+  );
+});
+
+// Listen for Request
+self.addEventListener("fetch", (event) => {
+  event.respondWith(
+    caches.match(event.request).then(() => {
+      return fetch(event.request).catch(() => {
+        caches.match("offline.html");
+      });
+    })
+  );
+});
+
+// Activate the SW
+self.addEventListener("activate", (event) => {
+  const cacheWhitelist = [];
+  cacheWhitelist.push(CACHE_NAME);
+
+  event.waitUntil(
+    caches.keys().then((cacheNames) =>
+      Promise.all(
+        cacheNames.map((cacheName) => {
+          if (!cacheWhitelist.includes(cacheName)) {
+            return caches.delete(cacheName);
+          }
+        })
+      )
+    )
+  );
+});