Gain insights into Progressive Web Apps. Delve into service workers, caching strategies, and their advantages. Learn about real-world Angular projects and deploying PWAs using Firebase. Optimize your web solutions efficiently.

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Progressive Web Applications are the state of modern web solutions. With the proper strategies, it is possible to drastically improve the overall performance and providing data even without a network connection. 
In an increasingly mobile-first world, optimising the time to load web pages can be our business's success. 

We will start by describing what PWAs are and their advantages over native and plain web applications. We then go deeper analysing fundamental concepts like service workers, caching strategies and when to use them in different scenarios. 

Aside from generic, framework-agnostic code samples, there will be an entire "hands-on" section dedicated to Angular, where we will create a complete, real-world PWA project from scratch.

Finally, we will learn how to deploy our PWAs to the cloud with different providers, describing in detail the approach with the Firebase platform. Thus, concluding our journey in the PWAs world.

Optimize your web projects with Progressive Web Apps


## Add to home screen dialog
To display an *add to home screen dialog* (in short, A2HS), asking the user to install the application locally is not enough to correctly initialize the manifest properties. We must also serve the app through a secure connection (HTTPS). In particular, Chrome requires the app to have a service worker registered.

If all these requirements are fulfilled, the browser shows the A2HS dialog. In this case, we are using a mobile browser, like Chrome for Android, in the screenshot below.

<br/>


# Add to home screen dialog
To display an *add to home screen dialog* (in short, A2HS), asking the user to install the application locally is not enough to correctly initialize the manifest properties. We must also serve the app through a secure connection (HTTPS). In particular, Chrome requires the app to have a service worker registered.

If all these requirements are fulfilled, the browser shows the A2HS dialog. In this case, we are using a mobile browser, like Chrome for Android, in the screenshot below.

<br/>

We created and set the web manifest correctly. Now, let's see how the browser reacts and how to install our PWA on a device.

Introduction

The Progressive Approach

Install a PWA on a Device

Service Workers

Caching Strategies

PWA Tools and Libraries

Angular PWA

Deploying our PWA

Wrap up

Add To Home Screen (A2HS)

Add to home screen dialog