How Do I Make Progressive Web Apps With Blazor Server-Side?


Scott Campbell

Progressive Web Apps (PWAs) are gaining popularity as they provide a seamless user experience by combining the best features of web applications and native mobile apps. Blazor, on the other hand, is a framework that allows developers to build interactive web UIs using C# instead of JavaScript. In this tutorial, we will explore how to create Progressive Web Apps with Blazor Server-Side.

What is Blazor Server-Side?

Blazor Server-Side is one of the hosting models offered by Blazor. It enables developers to build full-featured web applications using .NET Core on the server and rendering the UI updates over a SignalR connection to the client’s browser. This approach offers several advantages such as reduced bandwidth usage, faster load times, and improved security.

Setting up a Blazor Server-Side project

To get started with creating a Blazor Server-Side project, follow these steps:

  • Create a new project: Open Visual Studio and create a new Blazor Server App project.
  • Configure dependencies: Make sure you have the required packages installed for building PWAs with Blazor Server-Side. This includes Microsoft.AspNetCore.Components.WebAssembly.Pwa package.
  • Add service worker support: To enable PWA features, you need to register a service worker. Add the necessary code in your app’s startup class to configure service worker support.

Implementing PWA features

To implement PWA features in your Blazor Server-Side app, follow these steps:

Add manifest.json file

Create a manifest.json file in the wwwroot folder of your project. This file defines various properties of your PWA, such as name, icons, theme color, and start URL. Make sure to include the necessary icons in different sizes for better user experience.

Register service worker

In your app’s JavaScript file (e.g., wwwroot/service-worker.js), register the service worker using the navigator.serviceWorker.register method. This will enable offline capabilities and caching of your app’s assets.

Enable Add to Home Screen

To allow users to install your Blazor Server-Side app on their home screens, you need to implement the “Add to Home Screen” feature. This can be achieved by listening for the beforeinstallprompt event and showing a custom prompt to the user.

Building a responsive layout

Creating a responsive layout is crucial for providing a consistent user experience across different devices and screen sizes. Blazor Server-Side offers built-in support for responsive design using CSS frameworks like Bootstrap or Tailwind CSS.

To make your Blazor components responsive, you can use CSS media queries and flexbox/grid layouts. Additionally, you can leverage Blazor’s built-in component lifecycle events to dynamically update the UI based on screen size changes.


In this tutorial, we explored how to create Progressive Web Apps with Blazor Server-Side. We learned about Blazor Server-Side hosting model, setting up a project, implementing PWA features such as manifest.json and service worker registration, enabling Add to Home Screen functionality, and building a responsive layout using CSS frameworks.

By combining the power of PWAs and Blazor Server-Side, developers can create highly interactive web applications that provide a native-like experience across different platforms and devices.

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