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A dedicated and fully functional server-side composed micro frontend solution for Blazor.

Documentation Page

We have a dedicated documentation page for all things related Blazor. In case you need more extensive information and a bit of background you should check this one out.

👉 blazor.piral.io

👇 In this README you'll find the most important information to get started.

Installation & Setup

For using Piral.Blazor.Orchestrator you'll need an ASP.NET Core project using Blazor (server).

You'll only need to add a single NuGet package to the project:

install-package Piral.Blazor.Orchestrator

With the package installed you'll need to configure your project to actually use Piral.Blazor.Orchestrator.

// Add DI services
builder.Services.AddMicrofrontends<MfDiscoveryLoaderService>();

// Configure container
builder.Host.UseMicrofrontendContainers();

// Use middleware
app.UseMicrofrontends();

More details on this in the NuGet package README.

Creating Micro Frontends

Prerequisites

From scratch you can create a new Razor Component Library (RCL) project. By changing the csproj file's SDK to Piral.Blazor.Sdk you will be able to debug / develop this very conveniently.

The RCL has to be for .NET 8.

Module Definition / Registration and Usage of Components

In order to be a valid micro frontend there has to be one public class that inherits from IMfModule:

public class Module : IMfModule
{
    public Module(IConfiguration configuration)
    {
        // Inject here what you want, e.g., the global `IConfiguration`.
    }

    public void Configure(IServiceCollection services)
    {
        // Configure your services in this function
    }

    public Task Setup(IMfAppService app)
    {
        // Register components and more
        return Task.CompletedTask;
    }

    public Task Teardown(IMfAppService app)
    {
        // Unregister things that need to be cleaned up
        return Task.CompletedTask;
    }
}

In the Setup function you can wire up your components to names that can be used on the outside. For instance, to wire up a MapComponent Razor component to an outside name of "mfa-map" you can do:

app.MapComponent<MapComponent>("mfa-map");

If you need to set up more things - such as scripts or stylesheets used by your dependencies you'd do:

app.AppendScript($"https://mycdn.com/some-global-script.js");
app.AppendScript("_content/BlazorGoogleMaps/js/objectManager.js");

The paths will be set up / configured correctly by the app shell.

Dependencies

Just install your dependencies as you like; if they are correctly in the csproj they will be correctly in the NuGet package.

As an example, the following is a valid csproj file for a micro frontend:

<Project Sdk="Piral.Blazor.Sdk/0.1.0">

  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <Version>1.2.3</Version>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
    <AppShell>My.Emulator/0.1.0</AppShell>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="BlazorGoogleMaps" Version="3.1.2" />
    <PackageReference Include="BlazorOcticons" Version="1.0.4" />
  </ItemGroup>

</Project>

It denotes two dependencies; BlazorGoogleMaps and BlazorOcticons. The resulting NuGet package will reference these two dependencies, too - and therefore these two will be part of the server's / app shell's resolution.

Using Components from Micro Frontends

To use a component (such as "mfa-components" - this name is defined by the micro frontend calling the MapComponent method of the IMfAppService instance passed to their module definition - see below) without any parameters:

<MfComponent Name="mfa-component" />

You can also specify parameters if necessary / wanted:

<MfComponent Name="mfa-component" Parameters="@parameters" />

where

private Dictionary<string, object> parameters = new Dictionary<string, object>
{
  { "Foo", 5 }
};

The MfComponent component is available in the Piral.Blazor.Shared NuGet package. It can be used in the server / app shell or in any micro frontend.

Alternatively, you can also specify parameters directly, e.g., for the previous example you could also write:

<MfComponent Name="mfa-component" Foo="5" />

A Practical Example

A full example is online on GitHub:

👨‍💻 FlorianRappl/Piral.Blazor.Server.Samples.Tractor

License

Piral.Blazor is released using the MIT license. For more information see the license file.

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