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Getting started - Blazor WebAssembly (.NET 7)

Get started with the Enterprise-class Blazor Bootstrap Component library built on the Blazor and Bootstrap CSS frameworks.

Install Nuget Package​

Looking to quickly add Blazor Bootstrap to your project? Use NuGet package manager.

Install-Package Blazor.Bootstrap -Version 3.2.0

Add CSS references​

After the <base href="/" /> tag in the head section of the wwwroot/index.html file, add the following references:

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
<link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet" />
<link href="_content/Blazor.Bootstrap/blazor.bootstrap.css" rel="stylesheet" />
note

If you use the Blazor WebAssembly App Empty template (without demonstration code and Bootstrap), add the following references to the head section in the wwwroot/index.html. There is a known GitHub issue Blazor empty template doesn't load scoped CSS.

<link href="_content/Blazor.Bootstrap/Blazor.Bootstrap.bundle.scp.css" rel="stylesheet" />

Add script references​

Insert the following references into the body section of the wwwroot/index.html file, immediately after the _framework/blazor.webassembly.js reference:

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL" crossorigin="anonymous"></script>
<!-- Add chart.js reference if chart components are used in your application. -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.4.1/chart.umd.js" integrity="sha512-ZwR1/gSZM3ai6vCdI+LVF1zSq/5HznD3ZSTk7kajkaj4D292NLuduDCO1c/NT8Id+jE58KYLKT7hXnbtryGmMg==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<!-- Add chartjs-plugin-datalabels.min.js reference if chart components with data label feature is used in your application. -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-datalabels/2.2.0/chartjs-plugin-datalabels.min.js" integrity="sha512-JPcRR8yFa8mmCsfrw4TNte1ZvF1e3+1SdGMslZvmrzDYxS69J7J49vkFL8u6u8PlPJK+H3voElBtUCzaXj+6ig==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<!-- Add sortable.js reference if SortableList component is used in your application. -->
<script src="https://cdn.jsdelivr.net/npm/sortablejs@latest/Sortable.min.js"></script>
<script src="_content/Blazor.Bootstrap/blazor.bootstrap.js"></script>
tip

The chart.js reference is optional. Include it only when the Chart components are used in the application.

Register services​

Add Blazor Bootstrap service in the Program.cs

builder.Services.AddBlazorBootstrap();

Register tag helpers in _Imports.razor

@using BlazorBootstrap;

Remove default references​

The default Blazor template includes demonstration code, icons, and Bootstrap. To remove these components, follow these steps:

  1. Delete the bootstrap and open-iconic folders from the wwwroot directory:

    • Delete the wwwroot/css/bootstrap folder.
    • Delete the wwwroot/css/open-iconic folder.

  2. Remove the following line from wwwroot/index.html file:

    <link href="css/bootstrap/bootstrap.min.css" rel="stylesheet" />

  3. Remove the following line from wwwroot/css/app.css file:

    @import url('open-iconic/font/css/open-iconic-bootstrap.min.css');

Starter template​

GitHub Repo: Blazor Bootstrap - Blazor WebAssembly App (.NET 7)

Blazor Bootstrap - Blazor WebAssembly App

Sample Code​

index.html​

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <title>NET7.BlazorWebAssemblyApp</title>
    <base href="/" />
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet" />
    <link href="_content/Blazor.Bootstrap/blazor.bootstrap.css" rel="stylesheet" />
    <link href="css/app.css" rel="stylesheet" />
    <link rel="icon" type="image/png" href="favicon.png" />
    <link href="NET7.BlazorWebAssemblyApp.styles.css" rel="stylesheet" />
</head>

<body>
    <div id="app">
        <svg class="loading-progress">
            <circle r="40%" cx="50%" cy="50%" />
            <circle r="40%" cx="50%" cy="50%" />
        </svg>
        <div class="loading-progress-text"></div>
    </div>

    <div id="blazor-error-ui">
        An unhandled error has occurred.
        <a href="" class="reload">Reload</a>
        <a class="dismiss">🗙</a>
    </div>

    <script src="_framework/blazor.webassembly.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.4.1/chart.umd.js" integrity="sha512-ZwR1/gSZM3ai6vCdI+LVF1zSq/5HznD3ZSTk7kajkaj4D292NLuduDCO1c/NT8Id+jE58KYLKT7hXnbtryGmMg==" crossorigin="anonymous" referrerpolicy="no-referrer"></script> <!-- Add chart.js reference if Chart components are used in the application. -->
    <!-- Add sortable.js reference if SortableList component is used in your application. -->
    <script src="https://cdn.jsdelivr.net/npm/sortablejs@latest/Sortable.min.js"></script>
    <script src="_content/Blazor.Bootstrap/blazor.bootstrap.js"></script>
</body>

</html>

Program.cs​

using Microsoft.AspNetCore.Components.Web;
using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
using NET7.BlazorWebAssemblyApp;

var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.RootComponents.Add<App>("#app");
builder.RootComponents.Add<HeadOutlet>("head::after");

builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
builder.Services.AddBlazorBootstrap();

await builder.Build().RunAsync();

_Imports.razor​

@using System.Net.Http
@using System.Net.Http.Json
@using Microsoft.AspNetCore.Components.Forms
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.Web
@using Microsoft.AspNetCore.Components.Web.Virtualization
@using Microsoft.AspNetCore.Components.WebAssembly.Http
@using Microsoft.JSInterop
@using NET7.BlazorWebAssemblyApp
@using NET7.BlazorWebAssemblyApp.Shared
@using BlazorBootstrap;

MainLayout.razor​

@inherits LayoutComponentBase

<div class="bb-page">

    <Sidebar @ref="sidebar"
             IconName="IconName.BootstrapFill"
             Title="Blazor Bootstrap"
             DataProvider="SidebarDataProvider" />

    <main>
        <div class="bb-top-row px-4 d-flex justify-content-end">
            <a href="https://docs.microsoft.com/aspnet/" target="_blank">About</a>
        </div>

        <article class="content px-4">
            <div class="py-2">
                @Body
            </div>
        </article>
    </main>

</div>

<Modal IsServiceModal="true" />
<Preload />
<Toasts class="p-3" AutoHide="true" Delay="4000" Placement="ToastsPlacement.TopRight" />

@code {
    private Sidebar sidebar = default!;
    private IEnumerable<NavItem> navItems = default!;

    private async Task<SidebarDataProviderResult> SidebarDataProvider(SidebarDataProviderRequest request)
    {
        if (navItems is null)
            navItems = GetNavItems();

        return await Task.FromResult(request.ApplyTo(navItems));
    }

    private IEnumerable<NavItem> GetNavItems()
    {
        navItems = new List<NavItem>
        {
            new NavItem { Id = "1", Href = "/", IconName = IconName.HouseDoorFill, Text = "Home", Match=NavLinkMatch.All},
            new NavItem { Id = "2", Href = "/counter", IconName = IconName.PlusSquareFill, Text = "Counter"},
            new NavItem { Id = "3", Href = "/fetchdata", IconName = IconName.Table, Text = "Fetch Data"},
        };

        return navItems;
    }
}