add checkbox to disable web push

src/sw.js

@@ -0,0 +1,38 @@
+/* eslint-env serviceworker */
+
+import localForage from 'localforage'
+
+function isEnabled () {
+  return localForage.getItem('vuex-lz')
+    .then(data => data.config.webPushNotifications)
+}
+
+function getWindowClients () {
+  return clients.matchAll({ includeUncontrolled: true })
+    .then((clientList) => clientList.filter(({ type }) => type === 'window'))
+}
+
+self.addEventListener('push', (event) => {
+  if (event.data) {
+    event.waitUntil(isEnabled().then((isEnabled) => {
+      return isEnabled && getWindowClients().then((list) => {
+        const data = event.data.json()
+
+        if (list.length === 0) return self.registration.showNotification(data.title, data)
+      })
+    }))
+  }
+})
+
+self.addEventListener('notificationclick', (event) => {
+  event.notification.close()
+
+  event.waitUntil(getWindowClients().then((list) => {
+    for (var i = 0; i < list.length; i++) {
+      var client = list[i]
+      if (client.url === '/' && 'focus' in client) { return client.focus() }
+    }
+
+    if (clients.openWindow) return clients.openWindow('/')
+  }))
+})