BlazorPro.BlazorSize 1.2.2

There is a newer version of this package available.
See the version list below for details.
Install-Package BlazorPro.BlazorSize -Version 1.2.2
dotnet add package BlazorPro.BlazorSize --version 1.2.2
<PackageReference Include="BlazorPro.BlazorSize" Version="1.2.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add BlazorPro.BlazorSize --version 1.2.2
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: BlazorPro.BlazorSize, 1.2.2"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install BlazorPro.BlazorSize as a Cake Addin
#addin nuget:?package=BlazorPro.BlazorSize&version=1.2.2

// Install BlazorPro.BlazorSize as a Cake Tool
#tool nuget:?package=BlazorPro.BlazorSize&version=1.2.2
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

BlazorSize is a JavaScript interop library for Blazor that is used to detect the Broswer's current size, change in size, and test media queries.

BlazorSize was designed to allow Razor Components to implment adaptive rendering. Handle mobile/desktop rendering changes at runtime with ease and complement your apps CSS media queries with programmatic work flows.

Add the NuGet package

Package Manager

Install-Package BlazorPro.BlazorSize -Version 1.2.0


dotnet add package BlazorPro.BlazorSize --version 1.2.0


<PackageReference Include="BlazorPro.BlazorSize" Version="1.2.0" />

Reference the JavaScript interop

Add the JavaScript interop to your application's index.html or _hosts.cshtml

    <script src="_content/BlazorPro.BlazorSize/blazorSize.min.js"></script>

Configure DI

In startup.cs register ResizeListener with the applications service collection.

//services.AddResizeListener(options =>
//                            {
//                                options.ReportRate = 300;
//                                options.EnableLogging = true;
//                                options.SuppressInitEvent = true;
//                            });

Import the namespace

Add a reference to the namespace in your _Imports.razor or at the top of a page.

@using BlazorPro.BlazorSize


This example shows how to get the browsers width/height and check for media query matches. Depending on the matched media query the view can toggle between two components WeatherGrid or WeatherCards.

@inject ResizeListener listener
@implements IDisposable
@page "/fetchdata"

@using BlazorSize.Example.Data
@inject WeatherForecastService ForecastService

<h1>Weather forecast</h1>

<p>This component demonstrates adaptive rendering of a Blazor UI.</p>

<h3>Height: @browser.Height</h3>
<h3>Width: @browser.Width</h3>
<h3>MQ: @IsSmallMedia</h3>

@if (IsSmallMedia)
    <WeatherGrid Data="forecasts"></WeatherGrid>
    <WeatherCards Data="forecasts"></WeatherCards>

@code {
    WeatherForecast[] forecasts;

	// We can also capture the browser's width / height if needed. We hold the value here.
    BrowserWindowSize browser = new BrowserWindowSize();

    bool IsSmallMedia = false;

    protected override async Task OnInitializedAsync()
        forecasts = await ForecastService.GetForecastAsync(DateTime.Now);

    protected override void OnAfterRender(bool firstRender)

        if (firstRender)
			// Subscribe to the OnResized event. This will do work when the browser is resized.
            listener.OnResized += WindowResized;

    void IDisposable.Dispose()
		// Always use IDisposable in your component to unsubscribe from the event.
		// Be a good citizen and leave things how you found them. 
		// This way event handlers aren't called when nobody is listening.
        listener.OnResized -= WindowResized;

	// This method will be called when the window resizes.
	// It is ONLY called when the user stops dragging the window's edge. (It is already throttled to protect your app from perf. nightmares)
    async void WindowResized(object _, BrowserWindowSize window)
		// Get the browsers's width / height
        browser = window;

		// Check a media query to see if it was matched. We can do this at any time, but it's best to check on each resize
        IsSmallMedia = await listener.MatchMedia("(min-width: 768px)");

		// We're outside of the component's lifecycle, be sure to let it know it has to re-render.



Common media queries are already included as helpers to keep you out of the Bootstrap docs. Stay in your code longer and write cleaner statements too!

/// @media(min-width: 576px) { ... }
/// Small devices (landscape phones, 576px and up)
IsSmallUpMedia = await listener.MatchMedia(Breakpoints.SmallUp);

/// @media(min-width: 768px) { ... }
/// Medium devices (tablets, 768px and up)
IsMediumUpMedia = await listener.MatchMedia(Breakpoints.MediumUp);

// Large devices (desktops, 992px and up)
/// @media(min-width: 992px) { ... }
IsLargeUpMedia = await listener.MatchMedia(Breakpoints.LargeUp);

/// Extra large devices (large desktops, 1200px and up)
/// @media(min-width: 1200px) { ... }
IsXLargeUpMedia = await listener.MatchMedia(Breakpoints.XLargeUp);

/// Extra small devices (portrait phones, less than 576px)
/// @media(max-width: 575.98px) { ... }
IsXSmallDown = await listener.MatchMedia(Breakpoints.XSmallDown);

/// Small devices (landscape phones, less than 768px)
/// @media(max-width: 767.98px) { ... }
IsSmallDown = = await listener.MatchMedia(Breakpoints.SmallDown);

/// Medium devices (tablets, less than 992px)
/// @media(max-width: 991.98px) { ... }
IsMediumDown = = await listener.MatchMedia(Breakpoints.MediumDown);

/// Large devices (desktops, less than 1200px)
/// @media(max-width: 1199.98px) { ... }
LargeDown = = await listener.MatchMedia(Breakpoints.LargeDown);

/// Small devices (landscape phones, 576px and up)
/// @media(min-width: 576px) and(max-width: 767.98px) { ... }
IsSmallOnly = = await listener.MatchMedia(Breakpoints.OnlySmall);

/// Medium devices (tablets, 768px and up)
/// @media(min-width: 768px) and(max-width: 991.98px) { ... }
IsMediumOnly = = await listener.MatchMedia(Breakpoints.OnlyMedium);

/// Large devices (desktops, 992px and up)
/// @media(min-width: 992px) and(max-width: 1199.98px) { ... }
IsOnlyLarge = = await listener.MatchMedia(Breakpoints.OnlyLarge);

/// <summary>
/// Combines two media queries with the `and` keyword.
/// Values must include parenthesis.
/// Ex: (min-width: 992px) and (max-width: 1199.98px)
Breakpoints.Between(string min, string max)

string BetweenMediumAndLargeOnly => Breakpoints.Between(Breakpoints.MediumUp, Breakpoints.LargeDown);
// out: "(min-width: 768px) and (max-width: 1199.98px)"

IsBetweenMediumAndLargeOnly = await listener.MatchMedia(BetweenMediumAndLargeOnly);

NuGet packages (4)

Showing the top 4 NuGet packages that depend on BlazorPro.BlazorSize:

Package Downloads

A collection of Blazor components


A Blazor navbar component based off TailWindCss. It has the bare minimum styles to function with the option to add your own classes. It's built so it can be fully customizable and reusable.


A replacement service only for use with Telerik REPL for Blazor and BlazorSize. This is for demos only and should not be used outside of Telerik REPL for Blazor.


A testing library to provide helper extensions for BlazorSize.

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on BlazorPro.BlazorSize:

Repository Stars
A collection of examples related to Telerik UI for Blazor Components:
Version Downloads Last updated
6.1.0 13 12/1/2021
6.0.0 1,327 11/10/2021
6.0.0-pre2 334 10/5/2021
6.0.0-pre 147 8/23/2021
5.0.0 14,176 5/27/2021
5.0.0-pre 177 5/25/2021
3.2.1 11,733 3/9/2021
3.2.0 856 3/5/2021
3.1.0 40,962 11/30/2020
3.0.0 950 11/23/2020
2.3.0 27,374 8/11/2020
2.0.2 11,146 4/21/2020
1.2.2 7,287 1/26/2020
1.2.1 307 1/23/2020
1.2.0 380 1/22/2020

      Fixes initalization issues with Client-Side Blazor