Science Knowings: HTML Course For Social Media

HTML5 Notification API

Previously on HTML5 Web Speech API...

Before we dive into HTML5 Notification API, let's quickly recap our previous topic.

We explored the amazing power of HTML5 Web Speech API, delving into speech recognition, text-to-speech synthesis, and the exciting possibilities it brings to web development. Now, let's shift our focus to another equally fascinating topic: HTML5 Notification API!

HTML5 Notification API: A Glimpse

HTML5 Notification API empowers web applications to display native notifications to users, even when the app is not actively open. It offers a convenient way to engage users, deliver timely updates, and enhance the overall user experience.

Why use Notification API?

  • Improved User Engagement: Notifications help keep users informed and engaged with your app, even when they're not actively using it.
  • Timely Updates: Deliver important updates and reminders directly to users' devices, ensuring they don't miss out on critical information.
  • Enhanced User Experience: Notifications provide a seamless and convenient way for users to receive updates without interrupting their current activities.

Features of the API

  • Native Notifications: Display notifications using the device's native notification system for a consistent user experience across different platforms.
  • Customizable Content: Control the title, body, icon, and other properties of the notification to align with your app's branding and messaging.
  • Interactive Actions: Allow users to interact with notifications, such as opening a specific URL or performing an action within your app.

Creating Notifications

// Create a notification
const notification = new Notification('Your Notification Title', {
  body: 'Your Notification Body',
  icon: 'your-icon-url.png'

// Show the notification;

Properties of Notifications

  • title: The title of the notification.
  • body: The body text of the notification.
  • icon: The URL of the notification icon.
  • tag: A unique identifier for the notification. (useful for replacing or closing specific notifications)
  • data: Any custom data you want to associate with the notification.

Methods of Notifications

Method Description
close() Close the notification.
addEventListener() Add an event listener for a specific event (e.g., click, close).

Event Handlers

  • click: Triggered when the notification is clicked.
  • close: Triggered when the notification is closed.
  • error: Triggered when an error occurs while displaying the notification.


Before displaying notifications, you must request permission from the user. This ensures that users have control over the notifications they receive.

Cross-Origin Notifications

Notifications can be displayed even when the notification originates from a different domain than the page displaying it, allowing for cross-site communication.

Push Notifications

Push notifications are a special type of notification that can be sent to users even when the app is not actively open or running. They require additional setup and server infrastructure.

Service Workers and Notifications

Service workers can be used in conjunction with the Notification API to handle notifications even when the main app is not running. This ensures that notifications are delivered reliably.

Best Practices

  • Use sparingly: Don't bombard users with excessive notifications.
  • Provide value: Make sure your notifications are relevant and useful to users.
  • Test across devices: Ensure your notifications display correctly on different devices and browsers.


  • Notifications not showing up: Check if permission was granted and if the notification was created correctly.
  • Notifications closing too quickly: Increase the autoClose property of the notification.
  • Errors: Check the error event listener for any errors.

Next Up: HTML5 Push API

In the next session, we'll explore the HTML5 Push API, a powerful feature that allows you to send notifications to users even when your app is not actively open. Follow us to stay updated on the latest web development technologies and best practices!