Firebase Cookbook

How to do it...

1. Now write the following code and add it to our earlier code over the messaging.setBackgroundMessageHandler() function. So, the end result will look something like this:

      // [*] Special object let us handle our Background            Push Notifications          messaging.setBackgroundMessageHandler(function(payload)      {        const notificationOptions = {           body: payload.data.msg,           icon: "images/icon.jpg",           actions: [              {                 action : 'like',                 title: 'Like',                 image: '<link-to-like-img>'              },              {                 action : 'dislike',                 title: 'Dislike',                 image: '<link-to-like-img>'              }            ]        }        self.addEventListener('notificationclick',            function(event) {           var messageId = event.notification.data;           event.notification.close();           if (event.action === 'like') {        console.log("Going to like something !" ...