https://dmystapp.com/firebase-messaging-sw.js

1importScripts('https://www.gstatic.com/firebasejs/8.10.1/firebase-app.js');
2importScripts('https://www.gstatic.com/firebasejs/8.10.1/firebase-messaging.js');
3importScripts('./firebase-consts.js');
4
5firebase.initializeApp(config);
6
7const messaging = firebase.messaging();
8
9messaging.onBackgroundMessage((payload) => {
10    const data = payload.data
11    if (data.title != null && data.body != null) {
12        const actions = []
13        const category = data.click_action
14        if (category != null && category === 'link_category') {
15            actions.push({action: '2', title: 'Open Link'})
16        }
17
18        let notifData = {}
19        const itemId = data.itemId
20        if (itemId != null) {
21            const base64 = self.btoa(itemId)
22            const host = self.location.origin + '/dashboard/' + base64
23            notifData = { url: host }
24        }
25        this.registration.showNotification(data.title, { body: data.body, actions, data: notifData })
26    }
27})
28
29self.addEventListener('notificationclick', function(event) {
30  
31    const body = event.notification.body
32    const url = event.notification.data.url
33
34    if (event.action === '2') {
35        clients.openWindow(body)
36    }
37    else {
38        if (url != null) {
39            clients.openWindow(url)
40        }
41    }
42    event.notification.close();  
43}, false)