Learn BLAZOR-WASM with Real Code Examples

Blazor WASM enables full-stack C# development, running .NET code in the browser.

Uses WebAssembly to compile .NET IL (Intermediate Language) into a binary format that browsers can execute.

Supports component-based architecture, enabling reusable UI elements.

Integrates seamlessly with .NET ecosystem, including libraries, dependency injection, and tooling.

Runs entirely client-side, reducing server load and enabling offline capabilities.

Razor components for UI development

Two-way data binding

Event handling in C# instead of JavaScript

JavaScript interop for accessing browser APIs

Lazy loading and modular assemblies to reduce payload

Razor Component - UI element written in C# and Razor syntax

Binding - two-way connection between UI and data model

Event Callback - handles user interactions in C#

Dependency Injection - inject services into components

Routing - navigate between components in SPA

wwwroot/ - static assets (JS, CSS, images)

Pages/ - Razor components mapped to routes

Shared/ - reusable components and layouts

Program.cs - application entry point and DI configuration

_Imports.razor - global using directives

App.razor - root component defining router and layout

Define Razor components (.razor files)

Add C# logic for UI interactivity

Configure services and dependency injection

Set up routing for navigation between components

Test locally and debug using browser and .NET tools

Beginner: create basic SPA with navigation

Intermediate: integrate REST API and data binding

Advanced: use JavaScript interop and custom components

Expert: implement offline caching and PWA features

Auditor: optimize performance and bundle size

Blazor WASM vs React: Blazor uses C#, React uses JS/TS

Blazor WASM vs Angular: Blazor SPA runs in .NET runtime, Angular compiles to JS

Blazor WASM vs Vue.js: Blazor integrates with .NET ecosystem natively

Blazor WASM vs Blazor Server: WASM runs client-side, Server runs on backend

Blazor WASM vs JS frameworks: Strong typing and tooling with C#

2018 – Blazor introduced with Server-side prototype

2019 – Blazor WebAssembly experimental release

2020 – Blazor WASM stable release with .NET Core 3.1

2021 – .NET 5 Blazor enhancements and performance improvements

2022–2025 – Continuous improvements, .NET 6/7/8 support, PWA features, tooling enhancements

Razor Component - reusable UI block

WebAssembly - binary instruction format for browsers

Two-way binding - synchronize UI with data model

JS Interop - call JS functions from C#

PWA - progressive web app with offline support