This function will send a notification to the user.

Notification.js

// This function will send a notification to the user.
// If the user has not granted permission to show notifications
// it will ask for permission.
function sendNotification() {
  // Check if the browser supports notifications
  if (!("Notification" in window)) {
    console.log("This browser does not support notifications.");
  }
  // Check if the user has granted permission to show notifications
  else if (Notification.permission === "granted") {
    // If permission is granted, create a notification
    var notification = new Notification("Notification Title", {
      body: "This is the notification body.",
      icon: "https://example.com/icon.png",
    });
  }
  // If the user has not granted permission, ask for permission
  else if (Notification.permission !== "denied") {
    Notification.requestPermission().then(function (permission) {
      // If the user grants permission, create a notification
      if (permission === "granted") {
        var notification = new Notification("Notification Title", {
          body: "This is the notification body.",
          icon: "https://example.com/icon.png",
        });
      }
    });
  }
}