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FAST works seamlessly with Blazor, including integration with Blazor's binding engine and components. Let's take a look at how to set things up.

Setting up the Blazor project#

First, you'll need to make sure that you have the .NET SDK installed. You can learn more and download that on the official site.

With the SDK installed, you have access to the dotnet command-line interface. This can be used to create a new Blazor project. For example, to create a new Blazor App named "fast-blazor", you would use the following command:

dotnet new blazorwasm -o fast-blazor

Create a project using the command above if you don't already have one. When the CLI completes, you should have a basic runnable Blazor application. For more information on setting up and using Blazor, see the official Blazor Getting Started guide.

Configuring scripts#

Now that we've got our basic project setup, we need to add our web components script and update Blazor accordingly. You can either add the script from our CDN directly, or you can install it with NPM and then add that.

To add a CDN script for fast-components use the following markup:

<script type="module" src=""></script>

The best place to put this is typically in your index.html file in the script section at the bottom of the <body>.


If you are setting up FAST on a Blazor Server project, you will need to escape the @ character by repeating it in the source link. For more information check out the Razor Pages syntax documentation.

If you wish to leverage NPM instead, run the following command:

npm install --save @microsoft/fast-components

You can locate the single file script build in the following location:


Copy this to your wwwroot/script folder and reference it with a script tag as described above.

Using the components#

With your script tag added, you can use any component in any of your views. For example, you could put something like this in your Index.razor file:

@page "/"
<fast-card>  <h2>Hello World!</h2>  <fast-button appearance="accent">Click Me</fast-button></fast-card>

For a splash of style, add the following to your wwwroot/css/app.css file:

fast-card {  padding: 16px;  display: flex;  flex-direction: column;}
h2 {  font-size: var(--type-ramp-plus-5-font-size);  line-height: var(--type-ramp-plus-5-line-height);}
fast-card > fast-button {  align-self: flex-end;}

If you are using the .NET CLI, you can run your project with the following command from the project folder:

dotnet watch run

Congratulations! You're now set up to use FAST with Blazor!

Using the FluentUI Web Components#

FAST has special Blazor support for Microsoft's FluentUI Web Components. To leverage the FluentUI Design System, you'll need to make a few modifications to your project.

First, update the script tag to point to the FluentUI Web Components.

<script type="module" src=""></script>

Second, change the fast- prefix to fluent- in any CSS selectors.

Third, you will want to install the official Nuget package for FluentUI. You can use the following command:

dotnet add package Microsoft.Fast.Components.FluentUI

With this package installed, you can switch the HTML over to Blazor components. Here's an example:

@page "/"@using Microsoft.Fast.Components.FluentUI
<FluentCard>  <h2>Hello World!</h2>  <FluentButton Appearance="@Appearance.Accent">    Click Me  </FluentButton></FluentCard>

To report issues or provide feedback on Microsoft.Fast.Components.FluentUI, please visit the microsoft/fast-blazor repository.